Cabletron Systems MR-9000C User's Manual
Contents
1. internally connected to earth ground by the MR 9000C This eliminates the need for grounding the segments connected to the BNC ports EBERSOLE FIR NAAA 3000000000000 00 68 808 5 2 S222 202 299 9 0 0000000 00 0000000070000 000 025055 E 90000 00000 000008 9000000000 0 00000 005 000000099200 tT TR TIE IND 4 to 20 MHz normal 5 to 15 MHz worst case 78 ohms normal 76 to 80 ohms worst case Greater than 20 0 ohms to 30 volts normal 0 to 5 volts worst case 100 mV normal 75 to 150 mV worst case 0 5 ns normal 1 0 ns worst case 900 mV normal 550 mV worst case SPECIFICATIONS AND REQUIREMENTS 8 Logic Ref 9 Collision 7 No Connection 10 Transmit 6 Power Return 11 Logic Ref 5 Receive 12 Receive 4 Logic Ref 13 Power 12VDC 3 Transmit 14 Logic Ref 2 Collision 15 No Connection 1 Logic Ref 15 Position D Type Receptacle Connector Shell Connected to Case Figure 2 1 AUI Pin Connections The MR 9000C power supply senses and adapts to the input voltage and frequency Input frequency 47 63 Hz 120 volts nominal 9 120V normal 5 A 90 to 130 V worst case 220 volts nominal 15 A 9 220V normal 25 A 180 to 264 V worst case Output Voltage 12 Vdc normal 11 5 to 15 5 Vdc worst case Overload protection Input 1 3AG 2 amp fuse not user serviceable Output 1 3AG 1 amp fuse not user serviceable Page 2 3 SPECI2. is available from the U S Government Printing Office Washington D C 20402 Stock No 004 000 00482 5 ul CONTENTS CONTENTS CHAPTER 1 INTRODUCTION ll OVERVIEW i UR RR perpe inte oe Abe 1 1 12 GETTING HELD 1 2 CHAPTER 2 SPECIFICATIONS AND REQUIREMENTS 2 1 SPECIFICATIONS oa 2 1 General Specifications 2 1 BNC Interface Port 1 8 2 2 AUI Interface Port 9 oet 2 2 AUI Connector Pin Configuration 2 3 Power SUDDIy oed ca vate DEN UR 2 3 Environmental Requirements 2 4 Saleby ooo 2 4 SerVICO us ud a E 2 4 Physica 2 4 2 2 NETWORK DESIGN GUIDELINES 2 5 2 3 SITE SELECTION GUIDELINES 2 6 CHAPTER 3 INSTALLING THE MR 9000C 3 1 INSTALLING THE MR 9000C s eeeeeeeeeeeeeeee rennen 3 1 3 2 POWERING UP THE MR 9000C 3 3 CHAPTER 4 TESTING AND TROUBLESHOOTING 4 1 OPERATIONAL CHECK ttes 4 1 42 USING LAN VIEW aai preteen 4 3 iii CONTENTS iv INTRODUCTION CHAPTER 1 INTRODUCTION 11 OVERVIEW The MR 9000C Multiport Repeater conforms to IEEE 802 3 specifications It can connect up to eight thin net Ethernet coaxial segments to a thick or thin ne
3. D UOI pac Nader DN Delay times any segment in to all segments out Start of packet 1180 ns normal 1450 ns max Collision to JAM 1060 ns normal 1550 ns max Preamble Input 40 bits minimum to a maximum of 64 bits Packets that do not meet this range are discarded as runts or giants Output 64 bits minimum last 2 bits are 1 1 JAM output JAM pattern 1 0 is sent to all segments when one segment detects a collision Minimum packet repeated 96 bits including preamble Packet fragments are extended using the JAM data pattern FAULT protection Segment disconnect occurs after 32 consecutive collisions or when a segment s collision detector is on for longer than 2 to 3 ms FAULT protection resets automatically after one packet is transmitted onto the FAULT protected segment without causing a collision Page 2 1 SPECIFICATIONS AND REQUIREMENTS Internal transceiver Terminations Grounding Frequency range RX and CP pair input impedance differential RX and CP pair input impedance common mode Common mode voltage range at RX or CP Pair Input sensitivity at RX or CP pair Waveform symmetry TX Pair Output voltage into 78 ohms TX pair Page 2 2 BNC receptacle with gold center contact for use with BNC type plugs and RG 58 thin net cable Cabletron Systems TMS 3 transceiver Each segment is internally connected to a 50 ohm terminator Each segment connector shield is
4. FICATIONS AND REQUIREMENTS Operating temperature range 5 to 40 C Non operating temperature range 30 to 90 C Operating humidity 5 to 95 non condensing MO K ONNIN Q009002020 200000000 DRONE 69 9 006 ERS AAEH aeS Designed in accordance with UL478 UL910 725 2 b CSA IEC TUV VDE class Meets FCC part 15 Class A limits NOTE It is the responsibility of the person who sells the system to which the MR 9000C will be a part of to ensure that the total system meets allowed limits of conducted and radiated emissions SU Rea S acted Service ORNN NOTA x 3000059500420 6 55 SELLE ORIEN OQ0Q00 0000000 0006040606800 ESSERE CLAN AOSD EE I NEAN Voca MTBF MHBK 217D 20 970 hrs projected MTTR 0 5 hr STATA 0 909 0 000000 Dimensions 3 2H x 15 0W x 12 4D inches 8 13 x 38 1 x 31 5 cm Weight 7 lbs Shipping Weight 8 lbs Page 2 4 SPECIFICATIONS AND REQUIREMENTS 2 2 NETWORK DESIGN GUIDELINES In general if your network components meet 802 3 specifications the MR 9000C will function correctly Thick net cable segments must be 50 ohm Ethernet type coaxial cable Thin net cable segments must be 50 ohm RG 58A U type coaxial cable Thick net cable segments can be no longer than 500 meters 1640 feet Cable segments that are shorter than the maximum length shou
5. MR 9000C ETHERNET MULTIPORT REPEATER USER S GUIDE CaBICTROT YSTEMS The Complete Networking Solution CABLETRON SYSTEMS P O Box 5005 Rochester NH 03867 0505 NOTICE NOTICE Cabletron Systems reserves the right to make changes in specifications and other information contained in this document without prior notice The reader should in all cases consult Cabletron Systems to determine whether any such changes have been made The hardware firmware or software described in this manual is subject to change without notice IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY INCIDENTAL INDIRECT SPECIAL OR CONSEQUENTIAL DAMAGES WHATSOEVER INCLUDING BUT NOT LIMITED TO LOST PROFITS ARISING OUT OF OR RELATED TO THIS MANUAL OR THE INFORMATION CONTAINED IN IT EVEN IF CABLETRON SYSTEMS HAS BEEN ADVISED OF KNOWN OR SHOULD HAVE KNOWN THE POSSIBILITY OF SUCH DAMAGES Copyright April 1992 by Cabletron Systems Inc P O Box 5005 Rochester N H 03867 0505 All Rights Reserved Printed in the United States of America Order number 9030006 03 April 1992 LANVIEW is a registered trademark and MR 9000C TMS 3 LAN MD and ST 500 are trademarks of Cabletron Systems Inc Ethernet is a trademark of Xerox Corporation FCC NOTICE This device complies with Part 15 of FCC rules Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this devi
6. Systems LAN MD node testers and ST 500 transceivers 1 Connect one LAN MD to the network as shown in Figure 4 1 1 ST 500 transceivers 2 MR 9000C 3 LAN MD Figure 4 1 Operational Check Configuration Page 4 1 TESTING AND TROUBLESHOOTING 2 Select and run test 6 SERVER on the LAN MD Once the test completes successfully the LAN MD acts as a server it will echo packets when used with another LAN MD 3 Connect the second LAN MD to one of the repeater BNC ports as shown in Figure 4 2 2 EK d 1 3 did 2 MR 9000C 3 LAN MD Figure 4 2 Echoing Packets Through the Repeater 4 Select and run test 4 Node Check on the LAN MD that you connected in step 3 The Node transmits packets from one LAN MD through the repeater to the other LAN MD where they are echoed and returned to the first LAN MD If you send and receive at least 100 packets with no errors the repeater has passed the Node test 5 Repeat steps 3 and 4 for each BNC port on the repeater 6 Remove the LAN MD that you connected in step 1 Page 4 2 TESTING AND TROUBLESHOOTING 7 Onthe remaining LAN MD select and run test 3 XCVR On Net to ensure that there is traffic on the network 8 Remove a terminator from any of the segments connected to the repeater The FAULT LED for that segment should illuminate 9 Reconnect the terminator that you removed in step 6 10 Check that the FAULT LED for that segment goes
7. The LED flash is pulse stretched for viewing effect Collision OLLISION This red LED flashes when the repeater port detects a collision condition or a jabber packet on the network The flash frequency may increase as network traffic increases since more collisions are likely to occur The LED is pulse stretched for viewing effect Fault PAUL This red LED turns on when the repeater disconnects the segment from the network The repeater disconnects a segment when 32 consecutive collisions occur on the segment or when the collision detector remains on for longer than 2 to 3 ms The FAULT LED goes off the repeater reconnects the segment after one packet is transmitted onto the network without causing a collision Page 4 4 POWER SUPPLY CORD The mains cord used with this equipment must be a 2 conductor plus ground type with minimum 0 75 mm square conductors and must incorporate a standard IEC appliance coupler on one end and a mains plug on the other end which is suitable for the use and application of the product and that is approved for use in the country of application GERMAN Die Netzleitung die mit diesem Geraet benuetzt wird soll eined zwei Leiter mit Erdleiter haben wobei die Leiter mindestens 0 75 mm sind mit einer normalen IEC Geraetesteckdose an einem Ende veersehen sind der fuer den Gebrauch and die Anwendung des Geraetes geeignet und der zum Beneutzen im Lande der Anwendung anerkannt ist SPANISH E
8. ce must accept any interference received including interference that may cause undesired operation NOTE This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment uses generates and can radiate radio frequency energy and if not installed in accordance with the operator s manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause interference in which case the user will be required at his own expense to correct the interference If this equipment does cause interference to radio or television which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Re orient the receiving antenna Relocate the MR 9000C with respect to the antenna Move the MR 9000C away from the receiver Plug the MR 9000C into a different outlet so that the MR 9000C and the receiver are on different branch circuits If necessary you should consult the dealer or an experienced radio television technician for additional suggestions You may find the following Federal Communication Commission booklet helpful Interference Handbook This booklet
9. ceiver manual CAUTION You must disable the SQE Test function on the transceiver connected to the MR 9000C A repeater interprets the SQE test pulse as a collision and sends out a JAM signal when it detects a SQE pulse SQE induced JAM traffic can effectively disable your network All Cabletron Systems transceivers have an On Off switch for the SQE test function 3 1 INSTALLING THE MR 9000C VLVSSSSS Turm 3 2 Cable Support Bar 3 Mounting Screws 2 4 On Off Switch Figure 3 1 Installation 5 Attach the cable segment s to the BNC ports 1 8 Note The repeater BNC ports are internally grounded and terminated If you do not attach a terminated cable segment to a particular port that port s FAULT LED will illuminate To extinguish the FAULT LED attach a 50 ohm terminator directly to the port s BNC connector A FAULTed port will not affect the operation of the other repeater ports 6 Plugthe power cord into the power receptacle located next to the On Off switch 4 on the back of the repeater 7 Plugthe power cord into a wall receptacle 8 Use the cable ties to provide strain relief for the cables and the power cord Strap the cables to the cable support bracket located on the back of the repeater Page 3 2 INSTALLING THE MR 9000C 32 POWERING UP THE MR 9000C When you turn on the MR 9000C two LEDs on the front panel should illuminate The PWR LED 1 Fig 3 2 indicates that t
10. e two of those segments must be inter repeater links that is point to point cable segments with no taps 2 3 SITE SELECTION GUIDELINES Before you set up your MR 9000C be sure the selected site meets the following guidelines The surface area must be at least 21 inches wide 18 inches deep and 6 inches high The site must be within 7 feet of an appropriate power outlet The site temperature must be between 5 and 40 C Temperature changes must be no greater than 10 C per hour Page 2 6 INSTALLING THE MR 9000C CHAPTER 3 INSTALLING THE MR 9000C When you unpack the MR 9000C verify that you receive the following one 8 foot power cord cable support bracket two 8 32 x 375 inch screws e three 6 inch cable ties The bracket screws and cable ties are used to support the cables 3 1 INSTALLING THE MR 9000C Installing the MR 9000C is a simple process of attaching the cable support bar plugging in the Ethernet cables to the appropriate ports and then connecting the repeater to an AC power source 1 Using the two 8 32 inch screws 3 Fig 3 1 attach the cable support bar 2 to the repeater 2 Put the repeater on the selected site Be sure that the site meets the guidelines listed in Chapter 2 3 Attach an AUI cable no longer than 50 meters in length to the AUI port 1 on the repeater 4 Attach the other end of the AUI cable to an external transceiver Refer to the applicable trans
11. he repeater is receiving power e The XCVR PWR LED 2 indicates that the repeater is providing power to the transceiver connected to the repeater s AUI port MR 9000C wru LANVIEW MULTIPORT ETHERNET IEEE 802 3 REPEATER JAM CABLETRON T MS Figure 3 2 Power Indicators Some FAULT LEDs for individual ports may be illuminated as well Though each port is terminated internally the cable segments attached to the repeater s BNC connectors must also terminated If a port does not have a cable segment attached to it you may want to connect a 50 ohm terminator directly to the port to turn off the port s FAULT indicator Page 3 3 INSTALLING THE MR 9000C Page 3 4 TESTING AND TROUBLESHOOTING CHAPTER 4 TESTING AND TROUBLESHOOTING This chapter contains a procedure to perform an operational check on the MR 9000C It also explains how to use the LANVIEW LEDs to help troubleshoot network problems 3 1 OPERATIONAL CHECK If you suspect that you have a problem with your MR 9000C use this procedure to verify that it is operating correctly Before checking the repeater you should test each cable segment with a time domain reflectometer and verify that cable lengths and impedances are within IEEE and 802 3 limits You can run the following tests with the repeater connected to the network To perform the operational check you need two Ethernet node testers The following procedure uses Cabletron
12. l cable principal de la red el ctrica utilizado con este equipo debe tener 2 conductores y 1 toma de tierra con un m nimo de 0 75 mm cada uno y necesita tener un aparato de acoplamiento standard IEC en un extremo y un enchufe para el cable principal de la red el ctrica en el otro extremo lo cual sea adecuado para el uso y applicati n del producto y lo cual sea aprobado para uso en el pais de applicaci n FRENCH Le cordon d alimentation reliant cet appareil au secteur doit obligatoirement avoir deux fils conducteurs de 0 75 mm minimum et un fil de terre It doit galament tre quip du c te apparil d une fiche agr e IEC et du c te secteur d une prise adapt e l usage du produit et aux normes du pays l appareil est utilis
13. ld be Ethernet standard length 23 4 70 2 or 117 meters Note Non standard cable lengths can cause impedance mismatches which cause signal reflections and data errors Thin net cable segments can be no longer than 185 meters 607 feet in length Terminate all cable segments with a 50 ohm terminator A thick net segment can have a maximum of 100 transceivers spaced at least 2 5 meters apart Transceiver cable taps should be placed on the black bands on the cable The bands are placed at 2 5 meter intervals A thin net cable can have a maximum of 30 transceivers spaced at least 0 5 meters apart The BNC ports in the MR 9000C are connected to earth ground eliminating the need for grounding the segments connected to the BNC ports Warning Cable segments that are earth grounded at more than one point on the segment can develop dangerous ground currents For safety only one end of any thick or thin net segment should be connected to earth ground Page 2 5 SPECIFICATIONS AND REQUIREMENTS NETWORK DESIGN GUIDELINES CONTINUED The transceivers that the MR 9000C will be connected to must have their SQE test function turned off The AUI cable that connects the MR 9000C to a transceiver must be IEEE 802 3 type cable and must be 50 meters or less in length From its source address to its destination address a data packet may pass through a maximum of four repeaters and five cable segments If you use five segments of cabl
14. off 11 Repeat steps 8 through 10 for each segment connected to the repeater s BNC ports If the repeater passes all of the tests it passes the operational check 42 USING LANVIEW LANVIEW is a built in diagnostic and monitoring system Incorporated into the entire Cabletron Systems product line LANVIEW lets you quickly scan a series of LEDs to get a sense of network activity and help you isolate physical layer problems This section explains each of the MR 9000C LANVIEW LEDs MR 9000 wm LANVIEW MULTIPORT ETHERNET IEEE 802 3 REPEATER CABLETRON TEMS o ane 8 Figure 4 3 LANVIEW LEDs BERLE SR MORS ares el BoP EN 3 Power evn When lit this green LED indicates that the MR 9000C is receiving power The On Off switch is located on the back of the unit next to the power cord connection Transceiver Power ACVE PW When lit this green LED indicates that the MR 9000C is providing power to the transceiver connected to port 9 the repeater s AUI port Page 4 3 TESTING AND TROUBLESHOOTING When this red LED flashes the repeater is propagating a collision from the segment where the collision occurred to all segments connected to the repeater The repeater transmits the jam pattern 1 0 to all segments when it detects a collision on any segment na LED flashes when the repeater port receives data from the network
15. t cable segment You can connect any combination of Ethernet Version 1 Version 2 and IEEE 802 3 equipment The MR 9000C can transmit re timed data packets e regenerate preambles e extend collision fragments automatically partition problem segments e automatically reconnect non problem segments The MR 9000C Multiport Repeater incorporates Cabletron Systems LANVIEW monitoring and diagnostic system LANVIEW gives a visual indication of problems such as power failures collisions and cable faults LANVIEW can alert you to a problem condition and indicate the nature of the problem which streamlines troubleshooting MR 9000C RECEIVE LANVIEW MULTIPORT ETHERNET IEEE 802 3 REPEATER CaBIGTROn ooo 0900089 ao nrn v Page 1 1 INTRODUCTION 1 2 GETTING HELP If you need additional support related to the MR 9000C or if you have any comments suggestions or questions concerning this manual contact Cabletron Systems Technical Support at Cabletron Systems P O Box 5005 Rochester N H 03867 0505 Phone 603 332 9400 Page 1 2 SPECIFICATIONS AND REQUIREMENTS CHAPTER 2 SPECIFICATIONS AND REQUIREMENTS 2 1 SPECIFICATIONS Listed below are the electrical and physical specifications of the MR 9000C Cabletron Systems reserves the right to change these specifications at any time without notice APPRENDI RAO NITION IRE IUU
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