Cabletron Systems THN-MIM User's Manual
Contents
1. 2 this device 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 or more of the following measures Reorient the receiving antenna Relocate the equipment with respect to the receiving antenna Move the equipment away from the receiver Plug the equipment into a different outlet so that the equipment and the receiver are on different branch circuits If necessary the user should consult the dealer or an experienced radio television technician for additional suggestions The user may find the following booklet prepared by the F ederal Communication Co2. communication from one Ethernet device to the THN MIM 7593 No other Ethernet devices are allowed on the segment The far end of the 75 or 93 ohm coaxial cable segment must be terminated with a 50 ohm terminator This will ensure that the Ethernet device on the segment will receive the proper collision detection signal in the event of a collision The Ethernet device should be connected as close as possible to the terminator on the far end of the 75 or 93 ohm coaxial cable segment This will ensure that impedance mismatches due to reflection can be predicted The BNC ports of the THN MIM 7593 are connected to earth ground This eliminates the need for grounding the segment connected to the module mpedance mismatches may occur resultingin signal degradation due to the 75 or 93 ohm coaxial cable segment being connected toa 50 ohm terminator This may result in a Increased jitter on the segment ranging from 3 to H 6 ns depending on the mismatch b Under certain conditions false collisions may be created Page 2 2 INSTALLATION The THN MIM 7593 does not report false collisions to the IRM However if anon Cabletron Systems Ethernet device is connected to the segment it is possible for false collisions to be generated Non Cabletron System devices should be thoroughly tested before using them with the THN MIM 7593 2 2 3 Thick net Segments 50 ohm Ethernet type coaxial cable must be used when making up thick net cable
3. segments Each thick net cable segment connected toa THN MIM module must be no longer than 500 meters 1640 feet in length When making up networks requiring shorter cable runs Ethernet standard length 23 4 70 2 and 117 meter cable sections should be used These cable sections may be connected together by a barrel connector to form a cable segment Use of non standard cable lengths may result in impedance mismatches causing reflections to occur These reflections may cause data errors A 50 ohmterminator must be connected to the far end of the thick segment A BNC toN Series adaptor must be connected to the applicable BNC port to attach the thick net segment to the module A maximum of 100 transceivers may be attached to a thick net cable segment and these transceivers must be at least 2 5 meters apart throughout the length of the cable Transceivers should be placed on the black bands that run along the cable that are marked at 2 5 meter intervals For safety only oneend of a thick net segment should be connected to earth ground Connection to earth ground at morethan one point on the segment may allow for the occurrence of dangerous ground currents The BNC ports of the THN MIM are connected to earth ground This eliminates the need for grounding a thick net segment connected to the module Page 2 3 INSTALLATION 2 3 INSTALLATION Install the THN MIM into the MMAC as follows CAUTION Observe all dectrostatic precautio
4. COAXIAL MEDIA INTERFACE MODULE THN MIM INSTALLATION GUIDE CelBLETRON 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 F eb 1992 by Cabletron Systems I P O Box 5005 Rochester NH 03867 0505 All Rights Reserved Printed in the United States of America Order Number 9030034 02 F ebruary 92 MMAC MMAC 8 THN MIM LAN MD TMS 3 and Remote LANVIEW are trademarks of Cabletron Systems Inc LANVIEW and SPECTRUM are registered trademarks of Cabletron Systems Inc NOTICE 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
5. erly This section also contains procedures to check that the physical layer of the network is operating properly An Ethernet node tester that will generate valid data packets such as Cabletron Systems LAN MD is required for this procedure NOTE This procedureshould be performed only after testing each segment to verify that the cable lengths impedance and terminations are within IEEE 802 3 specification limits For the purposes of this procedure it is assumed that two Cabletron Systems LAN MDs are being used For details on the LAN MD refer to the LAN MD User s Manual Using a transceiver and an AUI cable connect aLAN MD tothe segment connected to the applicable BNC port 2 Select andrun test 6 SERVER This LAN MD now acts asa SERVER unit and will act as a packet echoer when used with another LAN MD 3 Usingatransceiver and an AUI cable connect another LAN MD to any other tested segment connected to the MMAC 4 Select and run test 4 NODE the LAN MD connected in step 3 Page 3 1 TESTING AND LANVIEW At least 100 packets should be sent and received with no errors The packets will be received from and sent back to the LAN MD acting as the SERVER When the applicable segment s connected to the THN MIM have successfully completed these tests the segments are ready for normal operation If any failures were noted please contact Cabletron Systems Technical Support 3 3 USING LANVIEW The THN MIM uses Cabl
6. etron Systems built in visual diagnostic and status monitoring system LANVIEW A network troubleshooter can quickly scan the LANVIEW LEDs to observe network status diagnose network problems and identify which node or segment is faulty The following discusses the function and the purpose of each LANVIEW LED onthe THN MIM NOTE Thereis onePort OK and Recdve RCV LED for each port on the module Port OK POK LED When lit this LED indicates that the port is connected to the network If the LED is not lit one of the following conditions exist a Theoccurrence of 33 consecutive collisions on the attached segment or the collision detector was on for more than 2 4 ms causing the port to be electrically disconnected from the MMAC b The port was turned off by Local Management The port has yet to receive a valid data packet after segmentation or upon power up Receive RCV LED This LED normally flashes on and off to indicate that the MMAC is repeating the data packet The rate at which the LED flashes will increase as network activity increases Page 3 2
7. h 75 or 93 ohm coaxial cable Thin net cable segments using 75 or 93 ohm cable Page 1 1 INTRODUCTION can be connected directly to the module Each of these segments supports one device TheentireTHN MIM or each port on the MIM can becontrolled via the IRM in your The IRM can be accessed directly through a console port on the front panel or be controlled and managed in band using Cabletron Systems Remote LANVIEW Windows SPECTRUM or SNMP compliant network control management software Each port on the THN MIM has two LANVIEW LEDs the Port OK POK LED and the Receive RCV LED The POK LED remains lit as long as the port is connected tothe network If a port is segmented from the network the LED will not be lit The RCV LED will be lit when activity is detected on the segment These LE Ds help diagnose physical layer problems as they arise 12 USING THIS MANUAL This manual provides instructions on installing the THN MIM into the MMAC attaching coaxial segments tothe MIM and testing those segments after they have been attached tothe MIM This manual assumes that the user has a general working knowledge of Ethernet and of I E EE 802 3 type data communications networks and their physical layer components If additional support is needed related to the Cabletron Systems THN MIM or if you have any additional comments improvements suggestions or questions feel free to contact Cabletron Systems Technical S
8. hat thetotal system meets allowed limits of conducted and radiated emissions Designed in accordance with UL478 UL910 NEC 725 2 b CSA IEC TUV VDE class A Meets FCC part 15 Class A limits SERVICE MTBF MHBK 217D gt 156 462 hr predicted MTTR lt 0 5 hr PHYSICAL Dimensions 13 4 D x 11 5 H x 2 W inches Weight 2 165 14 RELATED USER MANUALS The manuals listed below should be used to supplement the procedures and other technical data provided in this manual The procedures contained in these manuals will be referenced rather than repeated in this manual e Cabletron Systems TMS 3 Transceiver User s Manual e Cabletron Systems LAN MD Portable Ethernet Tester User s Manual Page 1 4 INSTALLATION CHAPTER 2 INSTALLATION 2 1 INTRODUCTION The Cabletron Systems THN MIM is designed for quick and easy installation into an No special skills tools are required to install this module 2 2 NETWORK DESIGN GUIDELINES The following network design guidelines must be followed when connecting segments to the THN MIM If not unsatisfactory network performance may result 2 2 1 Thin net Segments This applies to the THN MIM only For the THN MIM 7593 see section 2 2 2 e 500hmRG 58A U type coaxial cable must be used when making up a thin net cable segment A 50 ohm terminator must be connected to the far end of the thin net segment maximum of 30 connections may be made to a thin net cable
9. mmission helpful How Identify and Resolve Radio TV Interference Problems This booklet is available from the U S Government Printing Office Washington D C 20402 Stock No 004 000 00345 4 CONTENTS TABLE OF CONTENTS CHAPTER 1 INTRODUCTION 1 1 INT RODUCT LON 1 1 1 2 USING THIS MANUAL 1 2 1 a 1 2 1 4 RELATED USER 1 5 1 4 CHAPTER 2 INSTALLATION 2 1 INTRODUCTION 2 1 2 2 NETWORK DESIGN 2 1 2 2 1 Thin net SEQGMeNts cece cee eeeeeeeeeeeeeeecaetetaeteaeetaeeeeeeaes 2 1 2 2 2 Thin net Segments TH N MIM 7593 2 2 2 2 3 Thick net 2 3 23 INSTALLATION eels Gruen ven iene 2 4 CHAPTER TESTING AND LANVIEW SL INTRODUCTION 3 1 3 2 INSTALLATION 3 1 USING EANVIEW ener 3 2 CONTENTS INTRODUCTION CHAPTER 1 INTRODUCTION 11 INTRODUCTION Cabletron Systems Coaxial Media Interface Module THN MIM provides 12 Ethernet IE E E 802 3 coaxial cable connectors per module When used with the MMAC 8 enclosure up to 84 coaxial segments can be c
10. ns when handling the THN MIM Static discharges will damage the module 1 Remove the unit from the shipping box 2 Slide the two foam end caps off the unit 3 Remove the unit from the protective plastic bag and set the THN MIM a static free area Save the shipping box materials in case the module has to be reshipped 4 Slide the module into the card cage 5 Secure the module to the by turning the knurled knobs CAUTION BesuretheTHN MIM is firmly attached to the MMAC by turning the knurled knobs Failure to do so may result in improper operation Install the thick or thin net cable segment s to the BNC ports s on the module If a thick net cable segment is attached to a port on the module a BNC to N Series adaptor must be attached to the port The THN MIM is now ready for operation It is recommended that the segments be tested prior to transmitting data Refer to Section 3 2 INSTALLATION CHECKOUT Page 2 4 TESTING AND LANVIEW CHAPTER 3 TESTING AND LANVIEW 3 1 INTRODUCTION This section lists procedures to ensure that the segments connected to the Cabletron Systems THN MIM are operating properly A description of LANVIEW LEDs and their function in troubleshooting physical layer network problems are also provided 3 2 INSTALLATION CHECK OUT This section contains procedures to test that the physical layer of the network and a coaxial segment connected to the THN MIM are operating prop
11. onnected to The THN MIM can be mixed with other Media Interface Modules to provide a variety of different media connections This means that you can use a combination of twisted pair fiber optic and coaxial cabling from Each port on the THN MIM is repeated by the Intelligent Repeater Module IRM This feature assures data integrity and maximum data path distance by regenerating and re timing data packets each time they enter the This feature also assures fault isolation since the MMAC will segment problem ports from the network automatically If a port is segmented the port will be reconnected automatically to the network once the port has received a valid data packet Either thick or thin Ethernet cable can be connected tothe THN MIM Thin net cable segments using 50 ohm Ethernet type cable can be connected directly to the module Each of these segments can be up to 185 meters in length and can support up to 29 users Thick net cable segments made of 50 ohm Ethernet type cable can also be connected to the modules A BNC to N Series adaptor must be used to convert the thick net cable to a thin net cable Each thick net segment can be up to 500 meters in length and can support up to 99 users If 12 thick net segments are connected toa THN MIM up to 6000 meters of cable supporting 1024 host systems can be attached to that one module Another model the THN MIM 7593 is designed for use wit
12. segment These connections must be at least 0 5 meter apart e For safety only one end of a thin net segment should be connected to earth ground Connection to earth ground at morethan one point on the segment may allow for the occurrence of dangerous ground currents The BNC ports of the THN MIM are connected to earth ground This eliminates the need of grounding the thin net segments connected to the module e Connections on a thin net cable segment to host systems or transceivers are made by BNC tee connectors The male end of the BNC tee connector is used to connect directly to the host or to the transceiver The female ends of the tee connector must be connected to another part of the segment or to a terminator Page 2 1 INSTALLATION Since the ports on the module are internally terminated the end of the segment that will be connected to the module will not bea tee connector or terminator 2 2 2 Thin net Segments THN MIM7593 only The following network design guideline must be followed when connecting 75 93 ohm coaxial cable segments to the TH N MIM 7593 If not unsatisfactory network performance may result The length of the 75 or 93 ohm coaxial cable segment is dependent on signal loss from one end of the cable segment to the other Signal loss must not exceed 4 db when measured with a 5 MHz sine wave or 6 5 db when measured with a 10 MHz sine wave A 75 or 93 ohm coaxial cable segment will only support point to point
13. upport at Cabletron Systems P O Box 5005 Rochester NH 03867 0505 Phone 603 332 9400 13 SPECIFICATIONS Listed below are the specifications for the Cabletron Systems THN MIM Page 1 2 INTRODUCTION NOTE Cabletron Systems reserves the right to change these specifications at any time without notice BNC INTERFACE Ports 1 12 Type Internal Transceiver Terminations Grounding INDICATORS POK RCV BNC receptacle with gold center contact for use with BNC type plugs and RG 58 thin net cable Cabletron Systems TMS 3 Transceiver For further information refer to the TMS 3 Transceiver User s Manual Each segment is internally connected toa 50 ohm terminator in the port Each segment connector shield is internally connected to earth ground by the THN MIM This eliminates the need for grounding the segments connected to the BNC ports Indicates that the port is connected the network When the module is first installed into the the LED will not be lit until the first data packet passes through the port Indicates that the module is receiving a data packet from that segment ENVIRONMENTAL REQUIREMENTS Operating temperature 5 to 40C Non operating temperature 30 to 80 C Operating humidity 5 to 95 non condensing Page 1 3 INTRODUCTION SAFETY WARNING It is theresponsibility of the person who 5815 thesysten of which theTHN MIM will bea part toensuret
Download Pdf Manuals
Related Search