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Black Box Switch LE14XXA User's Manual

1. Troubleshooting for specific return procedures ack Box Modular Switches Installation and User Guide 8 99 2 Product Description 8 port and 16 port Modular Switches Black Box LE14XXA series Modular Switches boost the performance of large Ethernet Ns and have the flexibility of both fiber and twisted pair switched ports Their mixed adia capability provides for a variety of configurations including various types of fiber port nnectors and modes as well as allowing a mix of 10 100Mb RJ 45 copper ports in the same it This flexibility is achieved via a family of 4 Port modules that can be integrated with a base it in the factory and in the field to adapt the unit to the individual application s changing xed media requirements for a 10 100 Switch product The Black Box LE14XXA Series provide the switching speed and the reliability to 100thly support multiple workgroups at 100Mbps or 10 Mbps speed The LE14XXA Series fers the flexibility of four eight twelve or sixteen switched 100Mbps or 10 Mbps fiber and or 100 twisted pair ports in all the popular connector types The Black Box LE14XXA Series fers the LE1401A LE1404A and LE1416A models each with a configuration of four port adules 4 Port Modules for fiber types and for copper as well as 3 1 combo 3 RJ 45 and fiber port modules The 4 Port Modules can be configured into a LE14XXA Series Switch se unit in any mix of port connector or media types Designed for us
2. cece seeeeeseeeeseeeenerseeeeeeeeeeeaes 17 3 2 4 Connecting Twisted Pair RJ 45 oo sseeecseesenessceeeseesenesseeesseneseeaes 17 3 3 Table top or shelf mounting 3 3 1 Wall or Vertical Mounting 3 3 2 Rack Mounting cuida ice a eee 3 4 Copper ports Inernal jumper settings for 10 1OOMbps 0 0 eee eeeeeeeeereeee 19 3 5 Fiber ports Internal Jumper settings for LOOMDbpsS ococcicncnicnconiconcnnoncnnnanancnnnos 20 3 6 Combo ports Internal Jumper settings for RJ 45 amp fiber 10 or 100Mbps 21 3 7 Fiber ports Internal Jumper settings for LOMDDS oooonccicninicoconiconcnnancnonananonnnos 22 3 8 Powering the LE14XXA Series Switches ooooooccicnnnocncnnoconcononononoconononn ono nacnnononos 23 3 9 4 port Module 4PM InstallatiON oononionncnncnncnncnncnncnonnonnonncnncnncnncnncnnonncnnnnnn ns 24 3 9 1 Preparation for installing changing and removing 4PMs 24 3 9 2 Installing 4PM cards in the LE14XXA Series chassis cee 26 3 9 3 Removing 4PM cards in the LE14XX A Series chassis ooccncnninnnnn 27 AS OPERA TION iriiri inin EEE OREA EE 29 4 1 Switching Funtionality 0 eee cceecseescseeseeecseeeesesseeeseeecsecaeeesseeasseeseneeaees 29 AD Status EDS soii delta dica 30 4 3 Manual switches for Up link and Full Half Duplex ooococcninnonicncncnnnnnnnanancnnnanno 30 4 4 Auto negotiation option for copper Fast Ethernet ports s 30 4 5 Auto negotiation option for 10 Mbps ports HDX FDX mode ossee 32 4 6 Colli
3. yer port to half duplex mode See Section 3 4 1 LE14XXA Combo 4 port modules there are three LED s for each RJ 45 port which indicate itus as described for the LE1426C in Section 2 2 4 above The fiber port will run at 100Mbs eed at all times and has LEDs that indicate status the same way as described for the Fiber 4 rt modules in Section 2 2 2 above 2 6 Frame Buffering and Latency The Black Box LE14XXA Series are store and forward switches Each frame or cket is loaded into the Switch s memory and inspected before forwarding can occur This chnique ensures that all forwarded frames are of a valid length and have the correct CRC i e gt good packets This eliminates the propagation of bad packets enabling all of the available ndwidth to be used for valid information While other switching technologies such as cut through or express impose minimal ume latency they will also permit bad frames to propagate out to the Ethernet segments nnected The cut through technique permits collision fragment frames which are a result of e collisions to be forwarded to add to the network traffic Since there is no way to filter umes with a bad CRC the entire frame must be present in order for CRC to be calculated the sult of indiscriminate cut through forwarding is greater traffic congestion especially at peak tivity Since collisions and bad packets are more likely when traffic is heavy the result of yre and forward operation is
4. Mixed media combination modules 4 port modules with three fiber ports and one twisted pair port are supported in all of the LE14XXA Series Fiber Switch models All 4Port module manual selection switches and LED s are located on the front panel with the IEC standard AC power connector and a manual ON OFF power switch located at the rear Fan driven cooling air flows left to right 110 220 VAC 47 632 1058 Orr Figure 2 2 1b Rear view Black Box table top amp rack mount 4 Series Switches ack Box Modular Switches Installation and User Guide 8 99 2 2 4 port modules 100Mb fiber 0610 620 05 046 DXHDXeig 020 070 ote 1 ix A MTRJ Small Form Factor SC Type g 2 2 2 Fiber 4 Port Modules LE1420C LE1419C LE1423C LE1422C In a fiber 4 port module all of the fiber ports are of the same speed the same multi or igle mode and the same connector type Multi mode 100Mbps models are available with ST gt MTRJ and VF 45 connectors Single mode 100Mbps models are available with SC nnectors The 100Mb fiber 4 port modules on the Black Box LE14XXA Series normally are set ictory default to operate in full duplex mode for best fiber distance and performance On the 114XXA Series the user may select full or half duplex mode per port with an internal jumper tting See Section 3 4 for the flexibility to adapt to any type of Fast Ethernet devices On Black Box fiber 4PMs there are three LED s per fiber port
5. Note that even though the connector is shielded eithe unshielded or shielded cables and wiring may be used Connect the other end of the cable to the corresponding device 3 Use the LINK LED to ensure proper connectivity by noting that the LED will be illuminated when the unit is powered and proper connection is established 3 3 Table Top or Shelf Mounting The LE14XXA Series Switches can be easily mounted on a table top or any suitable horizontal surface and has four rubber feet to provide stability without scratching finished surfaces 3 3 1 Wall or Vertical Surface Mounting 8 port LE1401A Each LE1401A Switch is shipped with two metal mounting brackets and screws to allow the unit to be mounted in nearly any desired orientation or position The brackets are attached to the metal hub case using one of the metal screws for each bracket and attached to tt LE1401A through the round hole of the bracket A user supplied screw attaches the bracket to the mounting surface It is recommended that the mounting brackets be attached to two opposit corners of the unit When properly attached the brackets will extend slightly below the base o the unit to allow clearance for the rubber feet and for cooling fan exhaust space Wack Box LE1401A Modular Switch Magnum LE1401A optional Proper mounting mounting brackets bracket attachment Figure 3 1 LE1401A metal mounting brackets 3 3 2 Rack mounting models LE1408A and LE1416A In
6. The LE1408A provides a 100Mb fiber backbone facility 14 Black Box Modular Switches Installation and User Guide 8 99 Example 3 16 port LE1416A In another situation similar to Example 2 above a larger central Switch is needed to provide for a 6 segment 100Mb fiber Fast Ethernet backbone and switched copper support fo 4 high speed local servers In addition the router and two dual speed hubs need switched copp ports The total is 14 ports 6 fiber and 8 copper The mixed media flexibility of the Black Box 4 Port Switches provides the user with more than one configuration in this case The two ports not immediately used may be either fib or copper If the probable growth of the central Switch is towards more fiber backbone segments then two 4 port fiber 4PMs are selected to provide 6 required fiber ports and two fo spares and or future backbone expansion The 8 switched copper ports are handled with two R 45 4 Port Modules configured into the LE1416A Should the number of servers expand more than one server can be serviced by a switched LE1416A port by using a small 4 port 100Mbps hub If the probable growth of the central Switch is towards more local high speed servers and users then one 4 port fiber 4PM is selected to provide 4 of the required fiber ports and tu combo 3 RJ 45 1 fiber 4PMs are configured for the other 2 fiber ports plus 6 of the switch copper ports Finally an RJ 45 QPM is configured to provide for the remai
7. The Link LK LED dicates ready for operation when lit another LED indicates operation in full duplex mode aen ON when it is OFF operation is half duplex and an LED indicates Receiving Activity CT on the port A fiber cable must be connected to each 100Mb port and a proper link LK must be made with the device at the other end of the cable in order for the LK LEDs to ovide valid indications of operating conditions 2 3 4 port modules 10 Mb fiber O S The 10 Mb model LE1424C fiber 4 port adule is the same as the 100Mb LE1428C except r 10Mb speed rather than 100Mb speed It pports distances according to the 10Base FL standard i e 2Km distance for multi mode fiber ingle mode for 10km distance may be available as a special order Black Box Modular Switches Installation and User Guide 8 99 2 2 4 4 Port Module RJ 45 copper The Black Box LE14XXA Series copper port module model LE1425C provides four 10 100Mb switched RJ 45 ports The 10 100Mb switched ports are independently N way auto negotiating LE1425C for operation at 10 or 100Mb speed in full or half duplex mode as a default setting They independently move to half duplex mode at 10 Mb or at 100Mb speed if the device at the othe end of the twisted pair cable is half duplex or is not an auto negotiating device On the model LE1425C there are four LED s for each port The LK Link indicate ready for operation when lit the ACT Activity
8. ble supports F H mode auto negotiation or is set to operate as full duplex the 4 Port Switch 11 negotiate to run full duplex If the attached device or node doesn t support F H mode auto gotiation for example if it is a 10 Mb repeater or a standard 10 Mb hub the 4 Port Switch s 45 ports will default to operate at half duplex 5 Flow control IEEE 802 3x standard Black Box LE14XXA Series Switches incorporate a flow control mechanism for Full 1plex mode The purpose of flow control is to reduce the risk of data loss if a long burst of tivity causes the switch to save frames until its buffer memory is full This is most likely to cur when data is moving from a 100Mb port to a 10 Mb port and the speed difference makes 2 10Mb port unable to keep up It can also occur when multiple 100Mb ports are attempting transmit to one 100Mb port and in other protracted heavy traffic situations LE14XXA Series Fiber Switches implement the 802 3x flow control non blocking on 111 Duplex ports which provides for a PAUSE packet to be transmitted to the sender when 2 packet buffer is nearly filled and there is danger of lost packets The transmitting device is mmanded to stop transmitting into the 4 switch port for sufficient time to let the Switch 34 Black Box Modular Switches Installation and User Guide 8 99 reduce the buffer space used When the available free buffer queue increases the Switch will ser a RESUME packet to indicate the
9. the bottom of the 4PM card with the connector socket inside the unit Be sure the 4PM front panel is guided into the front slot cut out first and then precisely aligned the header pins with the holes in the socket slot mounted on the board Slowly and carefully apply enough pressure on both rear corner of 4PM Module to insert the 4PM card s pins into position A click sound will determine the proper lockup of the two see Figure 3 9 2b If you force the 4PM down when the pins are not properly aligned with the holes in the header the pins will become bent and the 4PM is damaged Once inserted the 4PM card will be secured by the header connector the front panel port slot cut out and retaining screws Use 4 40 Pan Head retaining screws to secure the module rear part and 4 40 Flat Head Black color retaining screws for front panel NOTE Ifa 4PM is difficult to install try it in another port slot Some of the port modules may fit easily in one port slot and be very hard to install in another 28 Black Box Modular Switches Installation and User Guide 8 99 Figure 3 9 2a Inserting 4PM Card into a LE1416A NOTE All 4PM slots need not be filled in order for the LE14XXA Series unit to be operational When leaving 4PM slots empty always use a face plate 4PM FP to cover the slot opening in the front panel This will maintain proper cooling air flor safety and operation as required by FCC CE and other regulations
10. uncompromised earthing path stallation This section describes installation of the LE14XXA Series Switches as well as nnection of the various Ethernet media types L Locating LE14XXA Series Switches The location of a LE14XXA Series Switch is dependent on the physical layout of the twork Typically the Switch is placed in a central wiring location where groups of network vices need to be connected in order to communicate with each other These Switches are gically rack mounted in a wiring closet see Section 3 3 2 below but because they have rubber at they can also be installed on a shelf or table top The compact size of the 8 port LE1401A it allows it to be easily placed in an office or lab area and it can also be either shelf of wall aunted see Section 3 3 1 below Locate an AC receptacle that is within six feet 2 meters of the intended LE14XXA ries site The rugged metal case of the LE14XXA Series will normally protect it from cidental damage in a lab or workplace setting Maintain an open view of the front to visually anitor the status LEDs Keep an open area around the unit so that cooling can occur from the 1all fan on the left side while the unit is in operation See figure below Figure 3 1 Location of 8 port LE1401A s cooling fan exhaust 110 220 VAC 47 63Hz 1 0 0 5A 16 Black Box Modular Switches Installation and User Guide 8 99 3 2 Connecting Ethernet Media The Black Box LE
11. Step 7 The figure below shows the top view of 4PM Card after successfully installed the 4P cards inside the LE1416A Back of Unit Cooling Fan Right Side Four QPM Slots gt Fig 3 9 2b Top View 4PM Module Installed inside a LE1416A Step 8 Once all 4PM cards have been installed including face plates for empty slots the chassis cover should be replaced 3 9 3 Removing 4PM Cards To properly remove a 4PM card from the Fiber Switch follow the 3 steps belos Step 1 Remove chassis cover See procedure in Section 3 9 1 above Caution Be sure the power cord is unplugged Step 2 Remove bottom front retaining screws for the 4PM and Face Plate 29 ack Box Modular Switches Installation and User Guide 8 99 On the bottom front of the unit there are two retaining screws for each 4PM card and face plate slot These screws are used to secure a 4PM card in position see Figure 3 9 3a Remove the front screws first and then screw mounted on the rear top of the 4PM to be removed VV VV Bottom retaining Screws for each QPM card Two retaining screws on the rear top of 4PM CARDS Figure 3 9 3a Front View Face Plate amp 4PM Retaining Screws ep 3 Remove 4PM Card Gently pull the 4PM card up and out of the connector socket see Figure 3 9 3b Figure 3 9 3b Removing a 4PM Card If the slot from which the 4PM card has been removed is to remain unused be sure to install a 4PM face plate cove
12. and User Guide 8 99 ant of the module identifies it as 10 FL to avoid confusion with other similar looking 100Mb yer QPMs 2 2 LE1419C 100Mbps multi mode FX S C 4 port type snap in connector The LE1410C is also a multi mode 100Mbps 100BASE FX Multi Mode SC Connectors yer optic transceiver module similar to the LE1428C has the same LEDs indicating port activity ACT nk LK and FDX HDX operational and the same gt e plate lettering While the functionality of the these two O ACTIVITY gt on g FULL HALF adules is the same the LE1419C is equipped with an DUPLEX MODE type snap in connector instead of an ST type 2 3 LE1421C 100Mbps single mode FX S C type snap in connector The LE1421C is a single mode 100Mbps fiber optic module equipped with a dual SC pe connector It functions as a full fiber optic transceiver to the Modular Switches supporting ur single mode fiber network segments 100BASE FX Single Mode TheLE1421C when installed in a SC Connectors 214XXA Series Modular Switch operating at OMbps full duplex supports single mode fiber 00060 ee ble lengths of as much as 25 Km see Power i E E E ESE EG 1dget Section 4 5 Each port is equipped with an Activity O ACTIVITY rank CT LED LINK LK LED 10 100 Speed and O FULL HALF DX FDX Half or full Duplex mode identical to DUPLEX MODE ose of the LE1419C To distinguish the single ade LE1421C from the multi mode LE
13. and can send receive auto negotiation pulses and when the second of the two connected devices is powered up i e when LINK is established for a port or when LINK is re established on a port after being 33 ack Box Modular Switches Installation and User Guide 8 99 e NOTE some NIC cards only auto negotiate when the computer system that they are in is powered up These are exceptions to the negotiate at LINK enabled rule above but may be occasionally encountered When operating in 100Mb half duplex mode cable distances and hop counts may be nited within that collision domain The Path Delay Value PDV bit times must account for all vices and cable lengths within that domain For Black Box LE14XXA Series Fast Ethernet itched ports operating at 100Mb half duplex the bit time delay is SOBT 5 Auto negotiation for 10 Mb ports half or full duplex mode Full duplex Ethernet provides separate Transmit and Receive data paths enabling nultaneous bi directional collision free data movements on a port The network topology must a star type not a bus type With full duplex mode the cable distance is only limited by 2 physical layer line driver and cable attenuation There are no collision domain restrictions or nitations The LE14XXA Series Switches perform half or full duplex mode auto negotiation dependently on all switched ports If the device or node on the other end of a port s attached
14. associated cables will function properly 5 Ifthe problem still exists contact Black Box 2 When Calling for Assistance If you determine that your LE14XXA Series Modular Switch is malfunctioning do not attempt to alter or repair the unit It contains no user serviceable parts Contact Black Box at 724 746 5500 Before you do make a record of the history of the problem Black Box will be able to provide more efficient and accurate assistance if you have a complete description including the nature and duration of the problem when the problem occurs the components involved in the problem any particular application that when used appears to create the problem or make it worse 3 Shipping and Packaging Information If you need to transport or ship your LE14XXA Series Modular Switch Package it carefully We recommend that you use the original container If you are shipping the LE14XXA Series Modular Switch for repair make sure you include everything that was in the original package Before you ship contact Black Box to get a Return Materials Authorization RMA number Ship the package to Black Box Corporation 1000 Park Drive Lawrence PA 15055 Phone 724 746 5500 Fax 724 746 0746 Black Box Modular Switches Installation and User Guide 8 99 amp Black Box Corporation The World s Source for Connectivity Copyright 1999 Black Box Corporation All rights reserved ES 1000 Park D
15. that more bandwidth is available for good packets when the traffic ad is greatest To minimize the possibility of dropping frames on congested ports each Black Box 114XXA Series Switches dynamically allocates buffer space from an 8 MB memory pool suring that heavily used ports receive very large buffer space for packet storage Many other ritches have their packet buffer storage space divided evenly across all ports resulting in a aall fixed number of packets to be stored per port When the port buffer fills up dropped ckets result The other two LE14XXA Series Switches LE1408A and LE1416A dynamically ocates buffer from an 4MB memory pool This dynamic buffer allocation provides the pability for the maximum resources of the LE14XXA Series unit to be applied to all traffic ads even when the traffic activity is unbalanced across the ports Since the traffic on an erating network is constantly varying in packet density per port and in aggregate density the 10 Black Box Modular Switches Installation and User Guide 8 99 LE14XXA Series Switches are constantly adapting internally to provide maximum network performance with the least dropped packets When the Switch detects that its free buffer queue space is low the Switch sends industry standard full duplex only PAUSE packets out to the devices sending packets to caus flow control This tells the sending devices to temporarily stop sending traffic which allows traffic catch
16. the 4PM Card package has all necessary accessories to install it properly The 4PM Card package for field installation comes along with a 4PM Card two 7 16 stand offs two 4 40 Pan Head screws two 4 40 black color Flat head screws and two Headers pin ep 2 Remove Chassis Cover The LE14XXA Series chassis are combined with top and bottom part and assembled gether with the help of 20 Philips head screws There are 7 screws located on front top of the it and three screws each on the left and right edges Remove these screws Once these are moved the top cover is easily lifted off the chassis base When the chassis top cover has been moved the interior of the unit 20 Phillips Head Screws on Top dN Caution Be careful not to disturb the power supply exposed gure 3 9 1a Removing hassis Cover 26 Black Box Modular Switches Installation and User Guide 8 99 Looking down into the LE14XXA Series unit notice that there are individual 4PM connector sockets along with two stand offs for each 4PM card position There are four 4PM slots located on the front of the LE1416Amodel whereas LE1401A and LE1408A has two 4P slots in the front See Figure 3 9 1b AC Power Inpu LED Stafus Slot Al Eight QPM Slots Figure 3 9 1b LE1416A Top View with Chassis Cover Step 3 Remove bottom front and modules rear top Retaining Screws in any 4PM or Face Plates On the bottom front of the unit there are two retaining screws
17. transmitter to start sending the packets Of course the transmitting device must also support the 802 3x flow control standard in order to communicati properly during normal operation Note When in Half Duplex mode the Modular switch implements a back pressure algorithmon 10 100 Mb ports for flow control That is the switch prevents frames from entering the device by forcing a collision indication on the half duplex ports that are receiving This temporary collision delay allows the available buffer space to improve as the switch catches up with the traffic flow 4 7 Power Budget Calculations for LE14XXA Series 4PM s with Fiber Media Receiver Sensitivity and Transmitter Power are the parameters necessary to compute the power budget To calculate the power budget of different fiber media installations using LE14XXA models the following equations should be used OPB Optical Power Budget P min Pr min where P Transmitter Output Power and Pr Receiver Sensitivity Worst case OPB OPB 1dB for LED aging 1dB for insertion loss Worst case distance Worst case OPB in dB Cable Loss in dB Km where the Cable Loss for 62 5 125 and 50 125um M m is 2 8 dB km and the Cable Loss for 100 140 Multi mode is 3 3 dB km and the Cable Loss for 9 125 Single mode is 0 5 dB km The following data has been collected from component manufacturer s HP s and Siemens we sites and catalogs to provide
18. 0 Mbps 3 Up link push button for RJ 45 4 port only Figure 4 3 Up link push itton on RJ 45 4 port The unit has a manual Up link ish button located on the front panel next to 10 100Mb RJ 45 4 port 1 which it controls It ables the port s cable to either connect to a user station node push in or to be cascaded push t to a 10 100Mb repeater or switching hub in the network Verify proper Up link push tton position by noting Port 1 s LK link LED status which is illuminated when a proper ik is made 4 Auto negotiation for Fast Ethernet copper ports The LE14XXA Series Fast Ethernet copper ports can be set for either fixed 100Mb eed or for 10 100 F H N way auto negotiation per the IEEE802 3u standard The selection is ade via an internal jumper see Section 3 4 for jumper setting instructions The factory default tting is for auto negotiation At 100Mb fixed speed the user may select half or full duplex ade by internal jumpers for each RJ 45 port separately 32 Black Box Modular Switches Installation and User Guide 8 99 One frequently used application for the 4 Port Switch copper ports is to connect on of them using a fiber media converter to another Switch in the network backbone or to some other remote 100Mb device In this case it is desirable to operate the fiber link at 100Mb spee and at either half or full duplex mode depending on the capabilities of the remote device Standard commercially available Fast Etherne
19. 10 Mbps Operating Environment Ambient Temperature 32 to 120 F 0 to 50 C Storage Temperature 5 to 140 F 20 to 60 C Ambient Relative Humidity 10 to 95 non condensing Packaging Enclosure Rugged High strength metal Suitable for stand alone or rack mounting Dimensions 1 75 in H x 17 0in W x 9 0inD 9 0 in W for QS580 4 45cm H x 43 2cm W x 22 9cm D 22 5 cm W for QS580 Weight 4 0 lb 1 8 Kg for rack mount models 2 5 lb for table top Cooling method Fan cooled 9 cfm Power Supply Internal AC Power Connector IEC type male recessed rear of chassis with adjacent manual ON OFF switch on AC model only Input Voltage 110 to 240 VAC auto ranging Input Frequency 47 to 63 Hz auto ranging Power Consumption 20 watts typical 8 port model 35 watts typical 16 port model Redundant power supplies available as options 48VDC Power Supply Optional Power Input Voltage 36 to 70 VDC auto ranging Terminal Block in rear GND Power Consumption same as for AC models see above 2 Black Box Modular Switches Installation and User Guide 8 99 For Dual Source and Redundant DC supply options see Appendices For optional 23 Telco rack mount brackets order Model RMB 23W Agency Approvals UL listed UL1950 cUL CE Emissions meet FCC Part 15 Class A Warranty Three years return to factory Made in USA ack Box Modular Switches Installation and User Guide 8 99 2 Model Information B
20. 1419C the label Sgl M is at the top of the faceplate the LE1421C 38 Black Box Modular Switches Installation and User Guide 8 99 5 2 4 LE1422C 100Mb multi mode FX 4 Port MTRJ small form factor connector LE1422C is a multi mode fiber optic 4 port module equipped with a small form fact MTRJ type connector It looks almost like an RJ 45 port but it is black in color The MT RJ s small size and ease of connection make it a good choice for 100Mbps fiber to the desktop Ethernet connectivity When installed in a LE14XXA Series full duplex Switch it supports fiber optic cable distances up the IEE standard 100Mbps shared collision domain distance limits i e typically 2 km at full duplex and 412m at half duplex 100BASE FX MTRJ Connectors eo ACTIVITY DS 3 FULLHALF DUPLEX MODE small form factor The functionality of this 100BASE FX multi mode 4PM is same as the ST and SC types and it is equipped with the same ACTIVITY ACT LINK LK LEDs to indicate proper connectivity with the remote device and FDX HDX indicate the FULL OR HALF DUPLEX MODE at the port It has the same 100Mb FX lettering on the faceplate Note th the other end of the fiber cable may have a different connector not necessarily an MT RJ type 5 2 5 LE1423C 100Mbps multi mode FX 4 Port VF 45 small form factor connector 39 ack Box Modular Switches Installation and User Guide 8 99 LE1423C is a 4 port mul
21. 14XXA Series Fiber Switches are specifically designed t support all standard Ethernet media types within a single Switch unit This is accomplished by using a family of 4 port Modules 4PMs which can be individually selected and configured per port See Section 2 4 for a description of the 4PMs The various media types supported along with the corresponding IEEE 802 3 anc 802 3u standards and connector types are as follows IEEE Standard Media Type Max Distance Port Module Fiber 100BASE FX mm Fiber 2 0km 6 562 ft LE1428C LE1419C sgl m Fiber 18 0km 95K ft LE1421C small form factor mm Fiber 2 0km 6 562 ft LE1422C LE1423C 10BASE FL mm Fiber 2 0km 6 562 ft LE1424C Copper 10BASE T amp 100BASE TX twisted pair 100m 328 ft LE1425C 1 mm multi mode 2 sgl m single mode 3 2 1 Connecting Fiber Optic S T type twist lock The following procedure applies to installations using a 4PM with ST type fiber connectors This procedure applies to ports using a LE1428C or LE1424C 1 Before connecting the fiber optic cable remove the protective dust caps from the tips the connectors on the 4PM Save these dust caps for future use 2 Wipe clean the ends of the dual connectors with a soft cloth or lint free lens tissue dampened in alcohol Make certain the connectors are clean before connecting Note One strand of the duplex fiber optic cable is coded using color bands at regular intervals you must use the color coded stra
22. 150 m 492 ft 100BASE FX half duplex multi mode 412 m 1350 ft 100BASE FX full duplex multi mode 2 0 km 6 562 ft 100BASE SX short wavelength HDX m m 300 m 935 ft 100BASE FX half duplex single mode 412 m 1350 ft 100BASE FX full duplex single mode 15 0 km 49 215 ft Connectors for copper wiring Twisted Pair at 10 100Mb RJ 45 shielded female front mounted for LE14XXA Series Fast Ethernet copper ports use Cat 5 cable Fiber Multi mode connector types Fiber Port SC type snap in Fiber optic multi mode 100BASE FX Fiber Port ST type twist lock Fiber optic multi mode 100BASE FX ack Box Modular Switches Installation and User Guide 8 99 Fiber Port MTRJ type plug in Fiber optic multi mode 100BASE FX Fiber Port VF 45 type plug in Fiber optic multi mode 100BASE FX Fiber Port ST type twist lock Fiber optic multi mode 10ASE FL Fiber Single mode connector types Fiber Port SC type Fiber optic single mode 100BASE FX Manual switch selections and jumpers Up link Push button Crossover sw for one RJ 45 port per LE1425C Fiber default Full duplex Internal jumpers may select HDX mode Copper default Auto negotiation Internal jumpers may alternatively lect fixed 100Mb full duplex or fixed 100Mbps half duplex LEDs Per Port LK Steady ON when media link is operational ACT ON with receiver port activity FDX HDX ON Full Duplex Mode OFF Half Duplex Mode 100 10 ON 100Mbps speed OFF
23. Black Box Modular Switches Installation and User Guide 8 99 April 1999 LE14XXA Modular Switches Customer Call our Technical Support Specialists to discuss your application Support For 24 hour technical support Call 724 746 5500 or Fax 724 746 0746 Information To order Call 724 746 5500 7 00 A M to 8 00 P M EST Mail order Black Box Corporation 1000 Park Drive Lawrence PA 15055 Black Box Modular Switches Installation and User Guide 8 99 Black Box Modular Switches Installation and User Guide Trademarks UL is a registered trademark of Underwriters Laboratories Important The LE14XXA Modular Switches contain no user serviceable parts Attempted service by unauthorized personnel shall render any and all warranties null and void If problems are experienced with an LE14XXA consult Section 6 Troubleshooting of this User Guide 1999 Black Box Corporation Printed in the United States of America Contacting Black Box Corporation Please use the mailing address and phone and fax numbers listed below Black Box Corporation 1000 Park Drive Lawrence PA 15055 Phone 724 746 5500 Fax 724 746 0746 P N 84 00020 Rev A 08 99 Black Box Modular Switches Installation and User Guide 8 99 FCC STATEMENT FEDERAL COMMUNICATIONS COMMISSION AND CANADIAN DEPARTMENT OF COMMUNICATIONS RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates uses and can radiate radio frequency energy and i
24. If full duplex will not function properly in your setup internal jumpers allow the speed and mode of the LE14XXA Series fiber 4 ports to be Jumper Settings for 100Mbps Fiber Half or Full Duplex JP1 2 6 7 9 10 Pin 1 2 6 7 9 10 JJ EDX 2100 config 100 Mb HDX 100 contig 100 Mb p 100Mbps Half Factory Settings Duplex 0 Ooo 9 10 11 12 2 F Jumper Settings for HDX FDX Bottom QPM Retaining Two 50 Pin NOEM Connectors nra Figure 3 5 Fiber ports internal jumper settings Note Be certain that the main power is disconnected before opening the unit or changing any internal jumper settings 21 ack Box Modular Switches Installation and User Guide 8 99 ced even if the attached device may or may not support full duplex This is desirable when 2re are unknown devices presently or potentially connected which will not operate correctly th full duplex Examples include hubs which support only half duplex by default Therefore the default setting of full duplex fiber ports is generally desirable because is widely used and allows for the connection of various devices without re nfiguration specially along with switches Under certain conditions where the connected vice is half duplex and does not support full duplex or the connected device does not support ll duplex properly no full duplex is better and the internal jumper settings will permit this to selected on a per port basis 5 Combo 3 1 ports internal
25. SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD Todas las instrucciones de seguridad y operaci n deber n ser le das antes de que el aparato el ctrico sea operado Las instrucciones de seguridad y operaci n deberan ser guardadas para referencia futura Todas las advertencias en el aparato el ctrico y en sus instrucciones de operaci n deben ser respetadas Todas las instrucciones de operaci n y uso deben ser seguidas El aparato el ctrico no deber ser usado cerca del agua por ejemplo cerca de la tina de ba o lavabo s tano mojado o cerca de una alberca etc El aparato el ctrico debe ser usado nicamente con carritos o pedestales que sean reconnendados por el fabricante El aparato el ctrico debe ser montado a la pared o al techo s lo como sea recommendado por el fabricante Servicio E usuario no debe intentar dar sercicio al equipo el ctrico m s all a lo descrito en las instrucciones de operati n Todo otro servicio deber ser referido a personal de servicio calificado El aparato el ctrico debe ser situado de tal mannera que su posici n no interfiera su uso La colocaci n del aparato el ctrico sobre una cama sof alfombra o superficie similar puede bloquea la ventilaci n no se debe colocar en libreros o gabinetes que impidan el flujo de aire por los orificios de ventilaci n El equipo el ctrico deber ser situado fuera del alcance du fuentes de calor como radiadores registros de calor estufas u
26. ST Connectors connector It functions as a fiber optics transceiver to support 100BASE FX C3 network segments When installed in a A eee ee ees i KS LE14XXA Series Fiber Switches it Ke Keg ee supports fiber optic cable distances up the IEEE specified 100Mbps shared collision O dd EINK domain distance limits i e typically 2km at G FULL HALF DUPLEX MODE full duplex and 412m at half duplex The module is equipped with an Activity ACT LED a Link LK LED which indicates proper connectivity with the remote device when lit and the FDX HDX LED indicat the full or half duplex mode Lettering on the front of the module identifies it as 100 FX to avoid confusion with other similar looking 10 Mb fiber 4PMs 5 2 la LE1424C 10 Mbps multi mode FL ST 4 port type twist lock connector The LE1424C is a multi mode 10 Mbps fiber optic module equipped with a dual ST type connector It looks similar to the 100Mb LE1428C but has the lettering 10 Mb on the front to distinguish it It supports fiber optic cable distances up the IEEE standard 10 Mb distance limits i e typically 2km at full duplex and at half duplex Each port has an Activity ACT LED indicating packets being received a Link LK LED that indicates proper connectivity with the remote device when lit and a FDX HDX LED to indicate full duplex mode when lit or half duplex when off Lettering on tl 37 ack Box Modular Switches Installation
27. TS PAGE TS SPECIFICATION Sd A aa 1 TA Technical Speciications ia 1 1 2 Model Information senie eea aai eei enia aieeaa 4 2 INTRODUCTION rreran ri EREA VEN REE E EEEE 5 2 1 Inspecting the Package and Product ssssssessssssesterstsesesrrsesrsrrsrerreststsrererersrees 5 2 2 Product Description Black Box Modular Switches 16 2 2 1 Modular Switch chassis Models oocoiononncninnoncnnonononononan cacon cnn no non oncnncnnnnonos 5 2 2 2 4 port modules LOOMD fiber ooooccccnnononicicnnncnnnonnnonononnonono canon cnn ononacnnnncnos 7 2 2 3 4 port module 10 Mb fiber oooooncncnicnccnonocccnnncnnnonononono cnn oncnn cnn na non oncnccnnnnonos 7 2 2 4 4 port module RJ 45 COpper ssesssesessssisesssssssersrsrsrsrsrstsrsrsrsrstnrnrsrsrseseet 8 2 2 5 4 port modules 3 1 3 RJ 45 and 1 fiber 0 eee eeeeseeeeeteeeees 8 2 2 6 Frame Buffering and Latency 0 ees eesseseeessceeeseesceeeseeecseeseeesseeasesaeees 9 23 Features and Benefits cx cadrete 11 DAA pplications vicseds cons tices EE EEN AAEE EER RRE 12 J INSTALLATION ile cirios 15 3 1 Locating the LE14XXA Series Switches oooocccicinnocncnnoncnconononnnnconononnononacnnononos 15 3 2 Connecting Ethernet Media eee ccsesseeseseeeeseeseseeseeecseesesesseeerseeseesseeeeaeeas 16 3 2 1 Connecting Fiber Optic ST type twist lock oo eects eteeeeeeeees 16 3 2 2 Connecting Fiber Optic SC type snap in eee eeteseeeeneneeeeeees 17 3 2 3 Connecting Fiber Optic Single Mode
28. a router and for a dual speed hub serving a local workgroup of over a dozen users inters etc The LE1408A equipped with one Fiber and one RJ 45 4 port modules provides an onomical solution configured with 8 switched ports four 100Mbps fiber and four 10 100 RJ in a rack mount box No Media Converters are needed The Fiber 4PM can be selected to ovide any 100Mbps fiber media connector type desired 4PMs with multi mode or single ade fiber types are available This requirement for connecting local devices over twisted pair cabling is handled by 2 LE1408A using a RJ 45 4 Port Module The 4PM provides a switched port for two local zh speed servers another for the router another for the users connecting into a 16 port dual eed hub such as the LE1408A Since 100Mb fiber Ethernet has severe distance limitations at half duplex it is cessary in high speed backbones to operate fiber links in the full duplex mode Many low end itches that only have RJ 45 N way 10 100Mb ports would need to have a media converter on ch fiber line But most media converters do not support auto negotiation and would not enable 2 fiber backbone lines to operate full duplex But the LE1408A with built in switched fiber rts at 100Mb speed with full duplex mode as a default setting on fiber ports and with some 45 N way 10 100Mb ports as well handles this application readily Internet 100Mb Fiber Link segment 100Mb Servers gure 2 4b
29. ack Box Modular Switches Installation and User Guide 8 99 Each 3 1 combo 4 port has an Activity ACT LED indicating packets being received ink LK LED that indicates proper connectivity with the remote device when lit a X HDX LED to indicate full duplex mode when lit or half duplex when off In addition the 45 ports have a speed LED indicating 100Mb when lit or 10 Mbps when off The fiber rt is always 100Mbps speed 2 8 LE1427C 3TP 1F 3 10 100Mb RJ 45 and 1 100Mb Fiber ST multi mode Connector Combo 4 Port 1e LE1427C is also a Combo 4 port supports three auto negotiating twisted pair ports at 100Mbps and one fiber port with 100Mbps multi mode similar to the FX SC connector It s the same LEDs indicating port activity ACT Link LK 10 100 Speed FDX HDX erational and the FDX LED for multi mode 100Mbps fiber optic transceiver module similar the LE1426C 2 9 LE1429C 3 1 3 10 100Mb RJ 45 and 1 100Mb Fiber SC Single mode Connector Combo 4 Port Module The LE1428C is also a 3 1 Combo 4 port module It is the same as the LE1426C 1 combo module except the fiber port is single mode See Section 5 2 3 for a description of 2 100Mb single mode fiber port 2 10 4PM FP The 4PM FP is a blank face plate that must be installed in empty 4PM slot When the 314XXA chassis contains less than required ant mounted 4PMs the empty front slots must covered with the 4PM FP face plate in order ma
30. ance It can segment 10 Mbps and 100Mbps units hubs and servers in the existing network into multiple domains providing greatly increased bandwidth In this case two 100Mb fiber connections are required 1 connect to more distant LAN centers and a configuration with two combo 3 RJ 45 1 fiber built in 4PMs is used The LE1401A provides complete network connectivity so that all 10 Mb and 100MI nodes operate in a unified manner functioning as one plug and play switched network facility It filters and forwards packets from one segment to another containing the local traffic and allowing only the packets which need to be forwarded to go outside to the appropriate other segments This is ideal for a central departmental switch in a high performance LAN center Figure 2 4 illustrates this example Fig 2 4a AFTER LE1401A Switch 100Mbps Fiber provides central p connectivity while maintaining full 10 Mbps and 100Mbps bandwidth on each segment 100Mbps Fiber Segment 13 ack Box Modular Switches Installation and User Guide 8 99 c lt ample 2 8 port LE1408A In another application a Switch is needed to provide a Fast Ethernet backbone The ckbone consists of four high speed LAN segments each operating over 100MB full duplex yer lines In addition to interconnecting the fiber backbone segments in the network center the vitch needs to provide high speed switched support for two central servers for a 100MB nnection to
31. arent to system software Front mounted LEDs world wide AC power supply Front panel LED s on each 4 port module display the status of each port for easy monitoring An internal auto ranging AC power supply allows LE14XXA Series Switches to be used throughout the world A 48VDC power supply is optional see Appendix B 12 Black Box Modular Switches Installation and User Guide 8 99 2 4 Applications Black Box LE14XXA Series Modular Switches offer high performance and flexibilit and are easily used in a variety of applications including client server computing performance upgrades of departmental networks and collapsed backbone applications The Dual Speed characteristic of the LE14XXA Series Switches enables them to inter connect a series of subnet one subnet per LE14XXA Series Switch in a LAN traffic center The subnet connections ma be via either fiber or twisted pair cabling and may be 100Mbps or 10 Mbps speed and full or half duplex mode The mixed media capability is ideal for upgrading existing Ethernet LAN networks where existing cabling must be accommodated The fiber built in media capability is ideal for integrating future proof fiber cabling into the LAN structure Example 1 LE1401A In a typical 10 Mb network performance upgrade some existing cascaded 10 Mbps hubs connect a group of users who share one 10 Mb traffic domain The LE1401A 4port Series Switch provides eight 10 100Mb traffic domains for increased perform
32. e in departments with multiple workgroups in remote offices and in twork traffic centers the LE14XXA Series Switches are easy to install and use Addresses of ached nodes are automatically learned and maintained adapting the switching services to twork changes and expansions Front mounted LEDs provide status information on each port 1e LE14XXA Series Switches provide high performance plug and play operation in convenient dle top and rack mount packages 2 1 LE14XXA Series chassis models The LE14XXA Series Modular Switches come in three chassis sizes an 8 port table p an 8 port rack mount and a 16 port rack mount Each is configurable with a selection of ad port i e 4 port modules providing the capability of 4 8 12 and 16 switched ports The port modules are normally factory installed but may be changed or added in the field See ction 5 The 8 port LE1401A table top chassis is compact in size and suitable for shelf aunted use in network wiring centers The LE1408A and LE1416A are 19 rack mountable Black Box Modular Switches Installation and User Guide 8 99 Switches with two or four 4 port slots in the front i e with a capacity of 8 or 16 switched ports The LE1408A and LE1416A rack mount units are typically used in larger network wirin centers Figure 2 2 1a Front view 8 port LE1401A table top 8 port LE1408A and 16 port LE1416 Modular Switches 8 Port Rack Mount 16 Port Rack Mount
33. ed and mode of the LE14XXA Series RJ 45 copper 4 ports to be fixed even if the attached device may or may not support auto negotiation This is desirable when there are unknown devices presently or potentially connected which will not operate correctly with auto negotiation Examples include some NICs and most Media Converters 3 7 Fiber 10Mb ports internal jumper settings for 10Mb fixed Half or Full Duple at all ports The factory default setting is for half duplex on all fiber 10Mbps ports which is generally popular HDX works well under most circumstances If half duplex on 10Mbps will not function properly in your setup internal jumpers allow the duplex mode of tl LE14XXA Series fiber 4 ports to be changed even if the attached device supports full duplex This is desirable when there are devices connected which will not operate correctly with half duplex Examples include Switches that support full duplex only Jumper Settings for 10Mb Fiber Half or Full Duplex III A A 123 JPzA HOX 10M contol YES L 0 FDX TOM config TEDI_OPEN_ ___OPEN J nDx erom config 10Mbps Full 10Mbps Half Duplex Duplex Printed Circuit card par Bottom QPM Retaining Two 50 Pin 4PM Connectors serts into main board Jumper Settings for HDX FDX J Al Settings for HDX FDX 23 ack Box Modular Switches Installation and User Guide 8 99 Figure 3 7 10Mbps Fiber ports internal jumper settings te Be certain that the
34. esseeseseeseeesseesesesseserseesesesseeesaeeas 41 6 2 When Calling for Assistance srne on a aen EAR RER EEE RE cnn EEE 41 6 3 Shipping and Packaging Informati0N ooocncinnnnnnnonnnnncnnncnn conan crono con rnnan cnn racnncnnnos 42 vi Black Box Modular Switch Installation and User Guide 08 99 1 SPECIFICATIONS 11 Technical Specifications Performance Aggregate Filtering Rate 2 380 800 frames sec for 16 100Mbps ports for LE1416A all ports are wire speed 1 190 400 frames sec for 8 100Mbps ports for LE1401A amp LE1408A Aggregate Forwarding Rate for Modular Switch Fast Ethernet ports all ports are wire speed 1 190 400 frames per second 16 port units 595 200 frames per second 8 port units Data Rate 10 Mbps and 100Mbps Address Table Capacity 24K node addresses 12K on 8 port models with address aging Packet buffer Size 8 MB dynamic 4MB for 8 port Latency 5 us packet time 100 to 100Mbps 15 us packet time 10 to 10 Mbps and 10 to 100Mbps Network Standards Ethernet V1 0 V2 0 IEEE 802 3 10BASE T TEEE 802 3u 100BASE TX 100BASE FX Maximum 10 Mbps Ethernet Segment Lengths Unshielded twisted pair 100 m 328 ft Shielded twisted pair 150 m 492 ft 10BASE FL multi mode fiber optic 2km 6 562 ft 10BASE FL single mode fiber optic 10 km 32 810 ft Maximum Standard Fast Ethernet Segment Lengths 10BASE T CAT 3 4 5 UTP 100 m 328 ft 100BASE TX CAT 5 UTP 100 m 328 ft Shielded twisted pair
35. f not installed and used properly that is in strict accordance with the manufacturer s instructions may cause interference to radio communication It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC rules which are designed to provide reasonable protection against such interference when the equipment is operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be necessary to correct the interference Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment This digital apparatus does not exceed the Class A limits for radio noise emission from digital apparatus set out in the Radio Interference Regulation of the Canadian Department of Communications Le pr sent appareil num rique n met pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de classe A prescrites dans le R glement sur le brouillage radio lectrique publ par le minist re des Communications du Canada iii Black Box Modular Switches Installation and User Guide 8 99 10 11 12 13 14 15 16 17 18 m gawe NORMAS OFICIALES MEXICANAS NOM ELECTRICAL
36. for each 4PM card sk as well as two other retaining screws on the rear top of the module These four screws are used to secure a 4PM face plate in position These screws are also used to secure the individual 4PM cards which can be subjected to significant forces from the attached cables See Figure 3 9 1c Two Bottom retaining Screws for each QPM card Two retaining screws on the rear top of ZIA Figure 3 9 1c Front View 4PM Retaining Screws hold Face Plates 27 ack Box Modular Switches Installation and User Guide 8 99 2 ep 1 ep 2 ep 3 ep 4 ep 5 ep 6 Installing 4PM Cards in the LE14XXA Series Up to four front mounted 4PM cards may be installed in one LE1416A Fiber Hub unit Follow these steps to install a 4PM Remove top chassis cover See procedure in Section 3 9 1 above Screw down tightly the two 7 16 stand offs on the top of pre installed stand offs from the factory Align the two headers pin on the top of the two sets of socket fixed at the bottom side of the 4PM module Note After firmly attached the sockets and the header pin move the mounted pins slightly tilted towards the front of the chassis Jumper Settings for HDX FDX and Auto Negotiation The figure here illustrates the basic layout of an individual 4PM card Each 4PM card fits into the wo Set of Ten 10 Pin PM Connector inserts into main board selected 4PM connector socket slot Align the connector pins on
37. guidance to network designers and installers Module LE1424C 10 Mb Multi FL mode LE1428C 100Mb Multi FX mode ri 4 23 5 31 LE1421C eee 18 i300 97125 15 31 ee mode 0 4 i LE1422C 100Mb Multi 2 1300 62 5 12 31 FX mode 0 4 23 5 31 35 ack Box Modular Switches Installation and User Guide 8 99 T2 422c L00Mb Multi 1300 l62 5 12 14 31 15 5 16 5 7 FX mode 0 4 5 Vote The use of either multi mode or single mode fiber to operate at 100Mbps speed over long distances i e in excess of approx 400 meters can be achieved only if the following factors are both applied e The 100Mb fiber segment must operate in full duplex FDX mode i e the full duplex factory default setting for 100Mbps fiber ports must be used and e The worst case OPB of the fiber link must be greater than the fiber cable s passive Attenuation Attenuation Cable loss LED aging loss Insertion loss safety factor Introduction LE14XXA Series 4 Port Modules 4PM This chapter describes each 4 Port Module 4PM including appearance functionality and status displays L Inspecting the Package and Product This section applies only to 4PMs shipped as separate items i e 4PMs not factory installed in a LE14XXA Series 4PM slot Examine the shipping container for obvious damage prior to installing a 4PM notify the carrier of any damage which you believe occurred during shipment or del
38. indicates receiving activity on that port the 10 100 LED indicates operation at 100Mb speed when ON and at 10 Mb speed when OFF when auto negotiation is not disabled and the FDX HDX LED is ON to indicate full duplex operation and OFF to indicate half duplex mode A twisted pair cable must be connected into each RJ 45 10 100Mb port and a proper link LK lit must be made with the device at the othe end of the cable in order for the LEDs to provide valid indications of operating conditions Internal jumper settings See Section 3 4 allow technicians to over ride the auto negotiation feature and to manually set each port at full duplex or half duplex One port on eacl RJ 45 4 port module is equipped with a Media Dependent Interface Crossover MDI X push button switch to simplify cascaded or up link connections 2 2 5 Combo 4 Port Modules 3 1 3 RJ 45 and 1 fiber port The combo 4 port modules are 0 0 0 0 0 0 0 0 f l combination of copper and fiber media available as three 10 100 switched RJ 45 100 10 copper ports and one 100Mb switched multi mode fiber ST or SC port or single mode SC port LE1426C ack Box Modular Switches Installation and User Guide 8 99 The RJ 45 ports run at 10 100Mbps with N way auto negotiation capability whereas 2 fiber port runs at 100Mbps with half or full duplex capability manually selected The fault condition is full duplex Internal jumpers settings allow technicians to set the 100Mb
39. intain proper cooling air flow and for fety etc Fig 5 2 10 Blank Face Plate 42 Black Box Modular Switches Installation and User Guide 8 99 6 0 TROUBLESHOOTING If problems should develop during installation or operation follow the suggestions below prior to calling Technical Support for help If you are unsure of any procedure described in this chapter or if the LE14XXA is not operating as expected do not attempt to repair or alter the unit Contact Black Box for assistance 6 1 Before Calling for Assistance 1 If you have difficulty installing or operating the LE14XXA Modular Switches refer tc Chapters 3 and 4 Make sure that the various other components of the network are working 2 Check the cables and connectors to make sure that they have been properly connected and the cables wires have not been crimped or in some way impaired during installatio1 3 Check that the AC power cord is plugged into a functioning electrical outlet Make su that the AC power cord is properly plugged into the Modular Switches Use the PWF LED to verify that the unit is receiving proper power 43 ack Box Modular Switches Installation and User Guide 8 99 4 If the problem is isolated to a network device other than the LE14XXA Series Modular Switch replace the problem device with a known good device Verify whether or not the problem is corrected If it is not go to step 5 If the problem is corrected the Modular Switches and its
40. ivery Inspect the contents of this package for any signs of damage and ensure that the items listed below are included This package should contain One or more 4PMs Installation instructions with illustrations Remove the 4PM s from the shipping container Be sure to keep the shipping container should you need to ship any of the 4PMs separately at a later date In the event there are items missing or damaged contact your supplier If you need to return the unit use the original shipping container if possible Refer to Chapter 5 for specific return procedures 2 Product Description 36 Black Box Modular Switches Installation and User Guide 8 99 An important feature of the LE14XXA Series is the use of 4 Port Modules 4PMs and for flexible mixed media connectivity to RJ 45 and fiber media use of Combo 4 port module Since the LE14XXA Series have dual speed capability for copper port the front port slots are designed to support all standard Ethernet media types at 10 o 100Mps speed Each 4PM provides one port for connecting one Ethernet segment with its individual connector type and media For a list and brief illustration of 4 Port Module types refer to Section 2 4 Each 4PM is individually described in the following sections 5 2 1 LE1428C 100Mb multi mode FX S T 4 port Module twist lock connector The LE1428C is a multi mode 100Mbps fiber optic 4 port module equipped with a dual ST type 100BASE FX and 10BASE FL
41. jumper settings for 10 100 RJ 45 Auto Negotiation or 10 or 100Mb or for fixed Half or Full Duplex 100Mb per port The factory default setting is Auto Negotiation on all RJ 45 ports and full duplex on fiber 10 Mbps or 100Mbps ports which is generally Jumper Settings for 10 100Mbps RJ 45 Auto Negotiation 10 or 100Mbps RJ 45 amp Fiber Half or Full Duplex 10 100 Mbps 10 or100Mbps Full 10 or100Mbps Half Auto Negotiation Duplex Factory Settings For RJ 45 amp Fiber port Bottom QPM Retaining A Two 50 Pin a QPM Connectors mserts into main board gure 3 6 Combo ports internal jumper settings Note Be certain that the main power is sconnected before opening the unit or changing any internal jumper settings pular Auto Negotiation on RJ 45 and FDX on fiber port works well under most cumstances but cannot always be depended upon to work as expected If full duplex will not nction properly in your setup internal jumpers allow the speed and mode of the LE14XXA 22 Black Box Modular Switches Installation and User Guide 8 99 Series Combo 4ports to be fixed even if the attached device may or may not support full duplex This is desirable when there are unknown devices presently or potentially connected which will not operate correctly with full duplex Examples include hubs that support only hal duplex by default If auto negotiation will not function properly in your setup internal jumpe allow the spe
42. lack Box Modular Switches MODEL DESCRIPTION LE1401A 8 port 10 100 Switch holds up to two 4 port Modules with 4 switched ports each Shelf or table top mounting For mixed media flexibility combinations of RJ 45 and various fiber port connector types modes and speeds can be configured Full speed filtering and forwarding at 100Mbps speed across all ports self learning 12K node address table and large 4MB packet buffers Front mounted LEDs internal auto ranging power supply LE1408A Same as Model LE1401A Switch but in a 19 rack mount package with mounting brackets LE1416A Same as Model LE1408A but with 24K node address table and 8MB packet buffers Holds up to four 4 port Modules 4PMs 19 rack mount package with mounting brackets LE14XXA Series 4Port Modules LE1419C Fiber module for LE14XXA Series Switches with four 100Mbps multi mode FX SC connectors LE1428C Fiber module for LE14XXA Series Switches with four 100Mbps multi mode FX ST connectors LE1421C Fiber module for LE14XXA Series Switches with four 100Mbps single mode FX SC connectors LE1422C Fiber module for LE14XXA Series Switches with four 100Mbps multi mode FX MTRJ connectors LE1423C Fiber module for LE14XXA Series Switches with four 100Mbps multi mode FX VF 45 connectors LE1424C Fiber module for LE14XXA Series Switches with four 10 Mbps multi mode FL ST type connectors LE1425C RJ 45 module for LE14XXA Series Switches with four 100Mbps au
43. ladding respectively Single mode fiber allows full bandwidth at longer distances and may be used to connect 10 Mb nodes up to 10 Km apart or 18Km with the LE1421C The same procedures as for multi mode fiber applies to single mode fiber connectors Follow the steps listed in Section 3 2 2 above Connecting Twisted Pair RJ 45 CAT3 CATS5 Unshielded or Shielded The RJ 45 ports of the LE14XXA Series can be connected to the following two media types 100BASE TX and 10BASE T CAT 5 cables should be used when making 100BASE TX connections When the ports are used as 10BASE T ports CAT 3 may be used In either case the maximum distance for unshielded twisted pair cabling is 100 meters 328 ft Media IEEE Standard Connector Twisted Pair CAT 3 4 5 10BASE T RJ 45 Twisted Pair CAT 5 100BASE TX RJ 45 OTE Itis recommended that high quality CAT 5 cables which work for both 10 Mb and 100Mb be used whenever possible in order to provide flexibility in a mixed speed network since dual speed ports are auto sensing for either 10 and 10O0Mb s The following procedure describes how to connect a 10BASE T or 100BASE TX twisted pair segment to the RJ 45 port The procedure is the same for both unshielded and shielded twisted pair cables 18 Black Box Modular Switches Installation and User Guide 8 99 1 Using standard twisted pair media insert either end of the cable with an RJ 45 plug intc the RJ 45 connector of the port
44. main power is disconnected before opening the unit or changing any ternal jumper settings ierefore the default setting of half duplex fiber ports is generally desirable because it is dely used and allows for the connection of various devices without re configuration where the nnected device is half duplex and does not support full duplex i e Hub and media converters xte For 10Mbps fiber ports the user can set the jumpers either at full duplex or half duplex on the four ports There is no individual port duplex options for 10 Mb port 3 Powering the LE14XXA Series Switch The Black Box LE14XXA Series Switches incorporate an internal universal power pply and has a recessed male IEC connector for the AC power cord at the left rear A manual wwer ON OFF switch is adjacent A six foot 115 VAC 60 Hz standard power cord is supplied th each unit shipped within the United States and Canada Figure 3 5 LE14XXA Series 110 220 ON AC power connector KAS P OEE The auto ranging power supply supports installation environments where the AC ltage is from 90 to 260 volts with a power input frequency of between 47 and 63 Hz The 8 rt units will consume just under 20 watts of power typically and the 16 port units will nsume about 35 watts typically When connecting the Ethernet cabling there is no need to power down the unit dividual segments can be connected or disconnected without concern for AC power related oblems
45. n power is sconnected before opening the unit or changing any internal jumper settings pended upon to work as expected If auto negotiation will not function properly in your tup internal jumpers allow the speed and mode of the LE14XXA Series RJ 45 copper 4 rts to be fixed even if the attached device may or may not support auto negotiation This is sirable when there are unknown devices presently or potentially connected which will not erate correctly with auto negotiation Examples include some NICs and most Media ynverters 20 Black Box Modular Switches Installation and User Guide 8 99 Therefore the default setting of auto negotiation copper ports is generally desirable because it is widely used and allows for the connection of various devices without re configuration Under certain conditions where the connected device is full duplex and does not support Auto negotiation or the connected device does not support Auto negotiation properly no auto negotiation is better and the internal jumper settings will permit this to be selected on a per port basis See Section 4 4 for additional information on auto negotiation functionality 3 5 Fiber ports internal jumper settings for 100Mb fixed Half or Full Duplex per port The factory or default setting is for full duplex on all fiber 100Mbps ports which is generally popular It works well under most circumstances but cannot always be depended upon to wor as expected
46. nd on the associated ports at eacl end of the fiber optic segment 3 Connect the Transmit TX port light colored post on the 4PM to the Receive RX port of the remote device Begin with the color coded strand of the cable for this first TX to RX connection 4 Connect the Receive RX port dark colored post on the PM to the Transmit TX pc of the remote device Use the non color coded fiber strand for this 5 The LINK LED on the front of the 4PM will illuminate when a proper connection has been established at both ends and when power is ON in the unit If LINK is not lit aft cable connection the normal cause is improper cable polarity Swap the fiber cables at the 4PM connector to remedy this situation 17 ack Box Modular Switches Installation and User Guide 8 99 Connecting Fiber Optic S C type Snap In The following procedure applies to installations using a 4PM with SC type fiber connectors i e using LE1419C LE1421C single mode When connecting fiber media to SC connectors simply snap on the two square male connectors into the SC female jacks of the 4PM until it clicks and secures Connecting Single Mode Fiber Optic When using single mode fiber cable be sure to use single mode fiber port connectors Single mode fiber cable has a smaller diameter than multi mode fiber cable 9 125 microns for single mode 50 125 or 62 5 125 microns for multi mode where xx xx are the diameters of the core and the core plus the c
47. ning 2 copper port plus two for spares and or future expansion Should the need arise to add a built in fiber backbone port in the future the RJ 45 4PM could be removed and another 3 1 combo 4PM installed in the field Alternatively a 100MB Media Converter such as the LH1500A ST R2 may be used on a copper port with internal jumpers See Section 3 4 set to support fixed 100MB FDX on the RJ 45 port Internet 100Mb Servers and Workstations 100Mb Workgroup Fig 2 4c LE1416A provides a 100Mb mixed media backbone Switch 15 ack Box Modular Switches Installation and User Guide 8 99 Installation Before installing the equipment it is necessary to take the following precautions 1 If the equipment is mounted in an enclosed or multiple rack assembly the environmental temperature around the equipment must be less than or equal to 50 2 If the equipment is mounted in an enclosed or multiple rack assembly adequate air flow must be maintained for proper and safe operation 3 If the equipment is mounted in an enclosed or multiple rack system placement of the equipment must not overload or load unevenly the rack system 4 If the equipment is mounted in an enclosed or multiple rack assembly verify the equipment s power requirements to prevent overloading of the building s electrical circuits 5 If the equipment is mounted in an enclosed or multiple rack assembly verify that the equipment has a reliable and
48. nnector types and speeds 4 port modules are available with 1OOMb mm ST SC VF 45 MTRJ single mode SC and 10 Mb ST type connectors The configuration of the fiber ports in the factory or in the field allows the LE14XXA Series Switches to adapt to mixed and changing fiber types in any application Configurable with RJ 45 copper ports 10 100 auto negotiation RJ 45 4 port modules provide twisted pair segment connections with N way auto negotiation or with manual speed and mode settings per port Mixed media configurations for maximum flexibility Combinations of port module types can be configured in the same unit adapting the LE14XXA Series Switches to varying quantities and types of fiber vs copper media Port module changes can even be done in the field Full duplex or Half duplex operation auto sensing All fiber and RJ 45 copper ports are capable of half or full duplex individually selected All RJ 45 ports support 10 100 auto negotiation or can be user selected for the desired operating mode and speed 16 port 12 port 8 port and 4 port models With two chassis sizes 16 port and 8 port configurable with 4 port 4PMs capacity options complement the mixed media configurability Plug and Play installation for high performance switching Black Box LE14XXA Series Switches are self learning for node addresses They can be placed into operation without complex set up procedures even in large networks They operate transp
49. onnections to other hubs etc The RJ 45 pins normally TP crossover push button DOWN are per the standard for hubs to users twisted pair wiring 1 receive 2 receive 3 transmit 6 transmit other pins not used When the TP crossover push button is UP the pins of the RJ 45 po are per the standard for up links using twisted pair wiring i e the transmit and the receive pairs are exchanged 1 transmit 2 transmit 3 receive 6 receive other pins no used 5 2 7 LE1426C 3TP 1F 3 10 100Mb RJ 45 and 1 100Mb Fiber SC multi mode Connector Combo 4 Port 10 100BASE T and 100BASE FX Combo Quad Port Connectors The LE1426C Combo 4 port supports three auto negotiating twisted pair ports at 10 100Mbps FDX HDX and one i fiber port with 100Mbps multi mode FX SC O activity 2 connector The three RJ 45 ports on the right FULL HALF DUPLEX RJ 45 FULL HALF DUPLEX FIBER LINK operate the same as those in the same place on the QPM RJ45 module The fiber SC connector functions as a fiber optics transceiver to support LOOBASE FX network segments When installed in a LE14XXA Series Fiber Switches it supports fiber optic cable distances up the IEEE standard 100Mbps distance limits i e typically 2km at full duplex and 412m at half duplex The factory default setting is for full duplex operation and a jumper on the module must be moved to select half duplex See Section 3 4 41
50. or damage to the unit Power supply options are available to suit the LE14XXA Series Switches to special zh availability communications and or heavy industrial grade applications including 48VDC with single DC input 48VDC with dual source DC input 48VDC with dual redundant internal power supply units and dual source DC input AC with dual redundant internal power supply units and dual source AC input 24 Black Box Modular Switches Installation and User Guide 8 99 See the Appendices of this manual for more details Use an RFQ for other variations 25 ack Box Modular Switches Installation and User Guide 8 99 4 Port Module 4PM Installation The LE14XXA Series Modular Switches are normally received from the factory with required 4PM modules installed There may be situations where 4PM cards need to be added replaced In cases where additional 4PM cards are needed the face plate for an available front aunted slot must be removed The following procedure describes this operation 1 Preparation for Installing and Removing 4PMs STOP Be sure the power cord is unplugged from the chassis before attempting to remove and or replace any 4PM cards Failure to do so may result in damage to the unit and will void the warranty aution Avoid Static Discharge The port modules like most electronic equipment are sensitive to static discharge Use proper ESD measures when handling port modules ep 1 Make sure
51. otros aparatos incluyendo amplificadores que producen calor El aparato el ctrico deber ser connectado una fuente de poder s lo del tipo descrito en el instrucivo de operaci n o como se indique en el aparato Precauci n debe ser tomada de mal manera que la tierra fisica y la polarizaci n del equipo no sea eliminada Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos poniendo particular atenci n a los contactos y recept culos donde salen del aparato El equipo el ctrico debe ser limpiado nicamente de acuerdo a las recommendaciones del fabricante En caso de existir una antena externa deber ser localizada lejos de las lineas de energia El cable de corriente deber ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u orificios de ventilaci n Servicio por personal calificado deber ser provisto cuando El cable de poder o el contacto ha sido da ado u Objectos han ca do o l quido ha sido derramado dentro del aparato o El aparato ha sido expuesto a la lluvia o El aparato parece no operar normalmente o muestra un cambio en su desempe o o El aparato ha sido tirado o su cubierta ha sido da ada iv Black Box Modular Switches Installation and User Guide 8 99 TABLE OF CONTEN
52. r in it If another 4PM card is replacing the one that has been removed follow the steps as described for installing a 4PM card discussed in Section 3 9 1 30 Black Box Modular Switches Installation and User Guide 8 99 4 0 OPERATION This chapter describes the functions and operation of the LE14XXA Series 4 1 Switching Functionality A LE14XXA Series provides switched connectivity at Ethernet wire speed among al of its ports The LE14XXA Series supports10 100Mbs for copper media and 10 or 100Mb separate traffic domain for fiber port to maximize bandwidth utilization and network performance All ports can communicate to all other ports in a LE14XXA Series but local traffic on a port will not consume any of the bandwidth on any other port LE14XXA Series units are plug and play devices There is no software configuring t be done at installation or for maintenance The only hardware configuration settings are user options for UP LINK on RJ 45 4 port Half Full duplex mode and 10 or 100Mbps selection f the switched ports can be done through jumper settings inside the unit The internal functions c both are described below Filtering and Forwarding Each time a packet arrives on one of the switched ports the decision is taken to eithe filter or to forward the packet Packets whose source and destination addresses are on the same port segment will be filtered constraining them to one port and relieving the rest of the networl from p
53. rive Lawrence PA 15055 724 746 5500 Fax 724 746 0746 45
54. rocessing them A packet whose destination address is on another port segment will be forwarded to the appropriate port and will not be sent to the other ports where it is not needec Traffic needed for maintaining the operation of the network such as occasional multi cast packets are forwarded to all ports The LE14XXA Series Switches operate in the store and forward switching mode which eliminates bad packets and enables peak performance to be achieved when there is heavy traffic on the network Address Learning All 16 port LE14XXA Series units have address table capacity of 24K node address 12K for 8 port models suitable for use in large networks They are self learning so that as 31 ack Box Modular Switches Installation and User Guide 8 99 ides are added or removed or moved from one segment to another the 4 Port Switch tomatically keeps up with node locations An address aging algorithm causes least used addresses to fall out in favor of new quently used addresses To reset the address buffer cycle power down and up w Status LEDs For all LE14XXA Series models PWR Power LED ON when AC power is applied to the unit LK Steady ON Link status for 10 Mbps and 100Mbps operation ACT ON with port activity for 10 Mbps and 100Mbps operation F H Full Half duplex LED ON when the port is running full duplex OFF for half duplex 100 10 Speed LED ON when the speed is 100Mbps OFF when the speed is 1
55. sion based flow ContrOl oooonnicnnonnncnnnnncnnnocannncnnnnnnocnnoncnn canon cnc rncnnoncnncnnanono 32 4 7 Power budget Calculation for LE14XXA Series 4PM s Fiber media 33 5 4 PORT MODULES AS SEPARATE ITEMS IN A SHIPMENT Jooooonocioconicinnncnonincnnnos 34 5 1 Inspecting the Package and Product oocononnncniononcnncnnnccnnonanononn conan cnnnn cnn cncnncnnannno 34 Black Box Modular Switches Installation and User Guide 8 99 5 2 Product Description comida daa e 34 5 2 1 LE1428C 100Mb multi mode FX ST twist lock connector 35 5 2 1a LE1424C 10 Mb multi mode FL ST twist lock connector 35 5 2 2 LE1419C 100Mb multi mode FX SC snap in connector 04 36 5 2 3 LE1421C 100Mb single mode FX SC snap in connector 36 5 2 4 LE1422C 100Mb FX Small Form Factor plug in connector 37 5 2 5 LE11423C 100Mb FX Small Form Factor plug in connector 37 5 2 6 LE1425C 10 100Mbps RJ 45 for standard twisted pair 5 2 7 LE1426C 3TP 1F Combo Twisted Pair and 100Mb Fiber SC mm 39 5 2 8 LE1427C 3TP 1F Combo Twisted Pair and 100Mb Fiber ST mm 39 5 2 9 LE1429C 3TP 1F Combo Twisted Pair and 100Mb Fiber SC sglm 40 5 2 10 4PM FP Face Plate cece ecseseeseeseeseceeeeseeeeseeseseeseserseeesseeaeeeeateas 40 6 0 TROUBLESHOOTING ion 41 6 1 Before Calling for Assistance ecesssseeeesee
56. sions and will allow both unshielded isted pair UTP and shielded twisted pair STP cable connections The LE1425C 4 port module is equipped with a Media Dependent Interface ossover MDI X push button to allow for one cascaded connections This feature eliminates 2 need for a special twisted pair crossover 10 100BASE T 4Port ble when connecting to a hub or another RJ 45 Connectors ritch With the push button in the IN X sition the PM TP port is used for Cross Over scaded and up link connections i e a Push Switch OM O ACTIVITY 2 LINK a FULLISALF aN coven Black Box Modular Switches Installation and User Guide 8 99 connection to another hub or switch typically When used for segments going to workstatior and other user node device connections the MDI X push button should be in the OUT position The LE1425C will support 1OBASE T unshielded twisted pair wiring UT environments with maximum segment distances up to 100m 325 ft or shielded twisted pair wiring STP of 150m 500 ft Each port has an Activity ACT LED indicating packets being received a Link LK LED that indicates proper connectivity with the remote device when lit FDX HDX LED to indicate full duplex mode when lit or half duplex when off and a speed LED indicating 100Mb when lit or 10 Mbps when off Important Note For the LE1425C Crossover Push button OUT for workstations and user connections IN for Up Link c
57. stallation of a LE1408A and LE1416A Mixed Media Fiber Switch in a 19 rack is simple procedure The units are 1U 1 75 high When properly installed the front mounted LED status indicators should be in plain ack Box Modular Switches Installation and User Guide 8 99 2w and easy to read Rack mount installation requires special rack mounted brackets and rews included with each LE1408A and LE1416A unit The brackets attach to the front sides the Switch which is then fastened into a standard 19 rack 1 RJ 45 ports internal jumper settings for 10 100Mb auto negotiation or for xed Half or Full Duplex 100Mb per port The factory or default setting is for auto negotiation on all RJ 45 ports which is generally pular It works well under most circumstances but cannot always be Jumper Settings for Auto Negotiation or for 100MB Half or Full Duplex Jumper Po unction Factory Setas Speed JP2 3 6 7 10 11 Pin 2 3 6 7 10 11 Auto Negotiation 10 100 Mb JP1 2 7 8 11 12 Pin 1 2 7 8 11 12 J HDX 100 config Factory Settings 10 100 Mbps 100Mbps Pi n 100Mbps Half JP1 2 6 7 9 10 PPin 1 2 6 7 9 10 FDX 100 config plex Ji 1234 Jumper Settings for HDX FDX and Auto Negotiation Auto Negotiation Duplex Bottom QPM Retaining Two 50 Pin No QPM Connectors inserts into main board Uplink Switch gure 3 4 RJ 45 ports internal jumper settings Note Be certain that the mai
58. t media converters mostly do not support auto negotiation properly and require that the switched port to which they are connected be at 100Mb fixed speed Attachment to 10 100 auto negotiation ports typically will not work properly The 4 Port Switch s RJ 45 ports handle this situation by changing the internal jump settings see Section 3 4 When 4Port Switch s RJ 45 copper ports are set for auto negotiation and connected an another auto negotiating device there are 4 different speed and F H modes selection dependil on what the other device supports These are 1 100Mb full duplex 2 100Mb half duplex 10 Mb full duplex and 4 10 Mb half duplex The auto negotiation logic will attempt to operate in descending order and will normally arrive the highest order mode that both devices can support at that time Since auto negotiation is potentially an externally controlled process the original highest order mode result can change at any time depending on network changes that may occur If the device at the other end is no an auto negotiating device the 4Port Switch s RJ 45 ports will try to detect its idle signal to determine 10 or 100 speed and will default to half duplex at that speed per the IEEE standard General information Auto negotiation per port for 802 3u compliant switches occurs when the devices at both ends of the cable are capable of operation at either 10 Mb 100Mb speed and or in full or half duplex mode
59. ti mode fiber FX small form factor VF 45 connector used imarily in 100Mbps fiber to the desktop links Its size is similar to the MT RJ port but the 3 45 shell is slightly larger When not in use its appearance is distinctive because it has a tiny aged door over the port hole to act as a dust cover 100BASE FX MV45 Connectors When installed in a LE14XXA Series odular Switches at full duplex it supports fiber tic cable distances up the IEEE standard 100Mbps G stance limits i e typically 2 km at full duplex and 2m on half duplex The small size about the same as an RJ 45 O ACTIVITY LINK duces the size of wiring panels in wiring closets FULLMALE rile providing the advantage of future proof fiber DUPLEX MODE tic technology small form factor The cable port is a plug in connector with th fiber strands terminated in one housing that cannot be improperly inserted The module is uipped with a LINK LK LED to indicate proper connectivity with the remote device an CTIVITY ACT LED that flashes to show when Fast Ethernet packets are being received and FDX HDX LED indicate the full duplex mode when lit or half duplex when off 2 6 LE1425C Twisted Pair 10 100Mb TP 4 Port The LE1425C module supports Ethernet twisted pair segments of any standard length is equipped with 4 port RJ 45 connector with 10 100 and auto negotiating capability on each rt The RJ 45 connector is shielded to minimize emis
60. to negotiating RJ 45 ports one of which has an up link push button LE1426C 3TP 1F module for LE14XXA Series Switches with three 10 100MB auto negotiating RJ 45 ports and one fiber port with 100Mbps multi mode FX SC connector LE1427C 3TP 1F module same as LE1426C but with fiber ST type multi mode connector LE1429C 3TP 1F module same as LE1426C but with fiber SC type single mode connector Black Box Modular Switches Installation and User Guide 8 99 2 Introduction 2 1 Inspecting the Package and Product Examine the shipping container for obvious damage prior to installing this product notify the carrier of any damage which you believe occurred during shipment or delivery Inspect the contents of this package for any signs of damage and ensure that the items listed below are included This package should contain 1 1 1 LE1401A LE1408A LE1416A Modular Switches AC Power Cord U S and other 115 VAC only Set of two wall mounting brackets for LE1401A Model only Set of metal Ears for optional 19 rack mounting for LE1408A amp LE1416A only Installation and User Guide this manual Remove the items from the shipping container Be sure to keep the shipping contain should you need to re ship the unit at a later date In the event there are items missing or damaged contact Black Box If the unit needs be returned please use the original shipping container if possible Refer to Section 6
61. up to occur without dropping packets Then normal packet buffering and processing resumes This flow control sequence occurs in a small fraction of a second and is transparent to an observer See Section 4 6 for additional details Another feature implemented in LE14XXA Series Switches is a collision based flow control mechanism when operating at half duplex only When the Switch detects that its free buffer queue space is low the Switch prevents more frames from entering by forcing a collision signal on all receiving half duplex ports in order to stop incoming traffic The latency the time the frame spends in the Switch before it is sent along or forwarded to its destination of the LE14XXA Series Switches varies with the port speed type and the length of the frame is a variable here as it is with all store and forward switches For 10 Mb to 10 Mb or 10 Mb to 100Mb or 100Mb to 10 Mb forwarding the latency is 15 microseconds plus the packet time at 10 Mb For 100Mb to 100Mb forwarding the latency is microseconds plus the packet time at 100Mb 11 ack Box Modular Switches Installation and User Guide 8 99 3 Features and Benefits 100Mb switching services for large high performance Ethernet LANs LE14XXA Series Switches provide Fast Ethernet switching on all ports They perform high speed filter forward operations on the traffic giving each port s segment a full 100Mb or 10 Mb of bandwidth Configurable with fiber ports all co

Black Box Switch LE14XXA User's Manual

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