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About This Manual

This guide describes how to install, operate, and maintain the Digital
Ethernet Twisted Pair Multiport Repeater - the DECrepeater 90T. The
DECrepeater 90T is a 9-port repeater designed for standalone operation
or as a managed repeater in the DEChub 90 Ethernet backplane.

Organization

This manual contains five chapters and three appendices.

•

Chapter 1 provides an overview of the Ethernet Twisted Pair
Multiport Repeater and briefly describes the product’s features.

•

Chapter 2 describes the configuration rules and conditions of operation
for the Ethernet Twisted Pair Multiport Repeater in a ThinWire
Ethernet system or standard Ethernet network.

•

Chapter 3 provides instructions for installing the Ethernet Twisted
Pair Multiport Repeater.

•

Chapter 4 provides information on managing the Ethernet Twisted
Pair Multiport Repeater on a network.

•

Chapter 5 provides basic troubleshooting information.

•

Appendix A details the system specifications and the parts list.

•

Appendix B provides a list of related documents to help you become
more familiar with your new system.

•

Appendix C provides more detailed information on management
issues.

Digital Internal User Only

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Содержание DECrepeater 90T

Страница 1: ...DECrepeater 90T Owner s Manual Order Number EK DETMR OM 001 Digital Equipment Corporation...

Страница 2: ...clause at DFARS 252 227 7013 Copyright Digital Equipment Corporation 1991 All Rights Reserved Printed in U S A FCC NOTICE The equipment described in this manual generates uses and may emit radio freq...

Страница 3: ...tandalone Installation 8 Table Mounting 8 Wall Mounting 8 Connect the cables 11 Install and Verify Devices 13 Backplane Installation 13 Install and verify devices 16 4 Management Managing the DECrepea...

Страница 4: ...er 90T Standalone Troubleshooting 35 DECrepeater 90T Backplane Configuration Troubleshooting 39 A DECrepeater 90T Specifications Physical Dimensions 42 Environmental Specifications 43 Operating Enviro...

Страница 5: ...lt and Non fault conditions 7 4 1 Summary of DECrepeater 90 Commands 21 4 2 DECbridge 90 Messages 31 4 3 DECrepeater Status LEDs 34 5 1 Troubleshooting a DECrepeater 90T Standalone Unit 35 5 2 Trouble...

Страница 6: ......

Страница 7: ...r 2 describes the configuration rules and conditions of operation for the Ethernet Twisted Pair Multiport Repeater in a ThinWire Ethernet system or standard Ethernet network Chapter 3 provides instruc...

Страница 8: ...wn in all upper case letters to differentiate them from regular text For the VMS operating system you can enter commands in either upper case or lower case letters For the ULTRIX operating system comm...

Страница 9: ...th the IEEE 802 3 standard for 10Base2 networks The twisted pair ports comply with the same standard for 10BaseT The repeater can be used in a standalone configuration or as a managed repeater when it...

Страница 10: ...ATION WORKSTATION DECSERVER DECrepeater 90T DECrepeater 90C DECserver 90L Segment Work Group Bridge Work Group COMPUTER 2 Work Group PC DECbridge 90 Backbone SERVER COMPUTER 1 Ethernet ThinWire Digita...

Страница 11: ...vity LED turns on and then off 2 Connect the unit to a properly terminated ThinWire Ethernet segment 3 Connect any personal computers workstations or other 10BaseT devices using a straight through pin...

Страница 12: ...activity The top Port Status Activity LED represents Port 1 and the bottom LED represents Port 8 When on the LEDs indicate that the functional status of the represented port is operational If the LED...

Страница 13: ...INTRODUCTION 5 6 4 5 3 2 1 LJ 00543 TI0 7 8 9 Digital Internal User Only...

Страница 14: ...h 185 Meters Each ThinWire segment must always be terminated with a 50 ohm terminator at each end Twisted Pair Maximum length 100 Meters Twisted pair segments do not require termination The 10BaseT st...

Страница 15: ...ing The DECrepeater 90T status LEDs show the status of the repeater The status may or may not be a fault of the repeater Table 2 2 contains both repeater fault and non repeater fault conditions Each p...

Страница 16: ...ce the DECrepeater 90T on a table top your only requirement to follow the envirionmental specifications found in Appendix A Wall Mounting Select a location for the unit The location should have access...

Страница 17: ...screws should be tight enough to provide resistance if you try to remove the back cover from the wall Do not make them so tight that the cover is distorted or cannot be removed from the wall 4 Remove...

Страница 18: ...10 INSTALLATION LJ 00701 TI0 Digital Internal User Only...

Страница 19: ...et For a 120 volt wall outlet connect the power supply directly to the wall outlet 3 All the LED indicators turn on for approximately one half second of initial power up then only the Network Activity...

Страница 20: ...12 INSTALLATION PC or Workstation 50 Ohm Terminator T Connector LJ 00703 TI0 Digital Internal User Only...

Страница 21: ...port is properly terminated and network activity is first received the port LED illuminates 2 Verify the operation of each port by sending information to the device being tested Backplane Installatio...

Страница 22: ...eater 90T can be installed into or removed from the DEChub 90 Ethernet backplane while power is supplied to the backplane hot swap 4 Supply power to the backplane new installations only 5 All LEDs tur...

Страница 23: ...INSTALLATION 15 NOTE The Port Status LEDs that indicate unconnected ports should be off when network traffic is established L J 0 0 7 0 4 T I 0 Digital Internal User Only...

Страница 24: ...E The DECrepeater 90T performs the twisted pair crossover cable function internal to the unit Point to point wiring is used when connecting a device to any of the twisted pair ports 2 Verify the opera...

Страница 25: ...in the DEChub 90 Examine port status enabled disabled properly operating or inoperative of repeater ports that share the DEChub 90 backplane with a bridge Examine the work group address database entri...

Страница 26: ...rnet interface therefore the circuit name is needed The Ethernet address should be on the label on the front panel of the DECbridge 90 The following Ethernet circuit names based on system type apply V...

Страница 27: ...ions Protocol MOP option This option comes as part of the regular distribution but is not selected by default and is not included in the Basic Installation It may however be installed from the origina...

Страница 28: ...rd with the Define Bridge Password command The password prompt is represented by the pound sign If you do not define a password the password prompt does not display when you log in You may make three...

Страница 29: ...B_MANAGEMENT ENABLE DISABLE PORT port number ENABLE DISABLE REPEATER hub slot number RESET SHOW ADDRESS start index PORT port number REPEATER hub slot number 1Changes made with the DEFINE command chan...

Страница 30: ...gle digit 1 The work group port is 2 A repeater port is identified by a hub slot number as described above and the port number within the slot of 0 to 8 For example 2 4 designates the fourth port on a...

Страница 31: ...difications to the parameters LIST BRIDGE Displays the non volatile bridge wide parameters SET PORT hub number slot number port number DISABLE Disables the attachment of a specific repeater port in th...

Страница 32: ...pendix C for further details on SHOW ADDRESS The following example displays all addresses contained within the hub configuration Address 5 and address 7 display the same hub slot and port because both...

Страница 33: ...ater and the port status for each port on that repeater The hub number may be 1 or 2 and slot numbers are in the range of 1 through 8 If no parameters are given information displays for all repeaters...

Страница 34: ...e following example displays the response to a SHOW REPEATER command for hub 2 slot 3 DECbridge SHOW REP 2 3 Hub 2 slot 3 ThinWire rev 1 6 ports Hub 2 slot 3 port 0 segment counter 0 status operationa...

Страница 35: ...er and manage the repeaters in both DEChubs with one DECbridge 90 The DECbridge 90 communicates to the DECrepeater 90T units using private signals on the DEChub backplane The two HUB units are connect...

Страница 36: ...3 4 5 6 7 8 VT420 DECrepeater 90C DECrepeater 90T DECserver 90L DECrepeater 90C DECrepeater 90T 08 00 2B 0F 19 23 08 00 2B 1D 07 21 08 00 2B 10 6A 31 08 00 2B 16 23 4C 08 00 2B 10 20 30 08 00 2B A6 43...

Страница 37: ...wer cycle or is reset the bridge begins to poll repeaters for status This includes a special algorithm for determining the ports on repeaters to which particular stations are attached This algorithm t...

Страница 38: ...lot 5 port 6 segment counter 0 status excessive length collision Hub 1 slot 5 port 7 segment counter 0 status excessive length collision Hub 1 slot 5 port 8 segment counter 0 status excessive length c...

Страница 39: ...sable a particular port on a repeater This may be useful if station s attached to that port are causing network difficulties DECbridge SET REPEATER 5 RESET This command resets the repeater to power up...

Страница 40: ...nagement is disabled Enable repeater management with the SET BRIDGE HUB_MANAGEMENT ENABLE command before trying again Hub number and slot number hub slot Hub is 1 or 2 slot is 1 15 Indicates one or mo...

Страница 41: ...to display valid commands 180501 Appears whenever a loopback diagnostic is run and passed on the backbone port If the backbone port is not receiving any messages this diagnostic is run every 10 minut...

Страница 42: ...t The brightness of the LED is directly proportional to the level of network activity Port 0 Status This LED indicates the status of the ThinWire input to the repeater It is illuminated to indicate fu...

Страница 43: ...shoot a DECrepeater 90T installed in a DEChub 90 configuration DECrepeater 90T Standalone Troubleshooting The following table troubleshooting information for a DECrepeater 90T in a standalone configur...

Страница 44: ...y the network activity LED portion of testing has passed If the network LED fails to illuminate Replace the repeater Port status LED is off Ensure that the cable has activity on it If the LED still fa...

Страница 45: ...alling the other network cables for each port that you are going to use If the status LED for the unconnected ports do not turn off while the LED for the connected port remains on there is a possible...

Страница 46: ...38 Troubleshooting 6 4 5 3 2 1 LJ 00543 TI0 7 8 9 Digital Internal User Only...

Страница 47: ...DEChub 90 is off there is a problem with the DEChub 90 power supply See the troubleshooting procedures in the DEChub90 Owner s Manual If the power LED on the DEChub 90 power supply is on are other com...

Страница 48: ...eplace the DECrepeater 90T The port 0 network activity LED is off The DECrepeater or any other unit in the DEChub 90 may not be connected to an active segment Connect a known active segment to any uni...

Страница 49: ...0T in a DEChub 90 Backplane If Then Do this If the condition still exists verify that the cable and station are good If the cable and station is good replace the DECrepeater 90T If the port LED turns...

Страница 50: ...ries Physical dimensions Environmental specifications Electrical specifications Parts List Physical Dimensions The physical dimensions of the DECrepeater 90T are as follows Dimension Measurement Heigh...

Страница 51: ...C to 50 C 41 F to 122 F Maximum rate of change 20 C hr 36 F hr Relative humidity 10 to 95 non condensing Wet bulb temperature 32 C 90 F maximum Dew point 2 C 36 F minimum Altitude Sea level to 2 4 km...

Страница 52: ...0T Power Supply Specification Value Voltage domestic 104 Vac to 128 Vac nominal 120 Vac Voltage international 208 Vac to 256 Vac nominal 240 Vac AC cord length 6 feet Current at 120 volts 25 amps Curr...

Страница 53: ...rs on the DECrepeater 90T Table A 1 MJ Pin Out Pin Signal 1 RD 2 RD 3 TD 4 Not used 5 Not used 6 TD 7 Not used 8 Not used Parts List Table A 2 Parts List Replacement Part Part Number DECrepeater 90T D...

Страница 54: ...DECSY CG Ordering Information Customers may order documents by phone or by mail In the Continental USA and Puerto Rico Call 800 DIGITAL or send mail to Digital Equipment Corporation Peripherals and S...

Страница 55: ...l Personnel Digital personnel may order these documents from Digital Equipment Corporation 444 Whitney Street Northboro MA 01532 Attn Publishing and Circulation Services NRO2 2 I5 Order Processing Sec...

Страница 56: ...0 seconds there is something wrong If using two hubs be sure the MMJ cable is wired correctly and it not shorted or broken If using only one hub the MMJ connector should be disconnected Only one DECbr...

Страница 57: ...each before giving up and going on to the next one If you add a station or move it to another port you can expect it to take about 10 minutes before SHOW ADDRESS will recognize this move If you remov...

Страница 58: ...of the address table This continuous learning timeout and relearning of the Ethernet addresses means that devices routinely residing in a particular work group may or may not be in the address table...

Страница 59: ...4 network BNC 4 port MJ 4 power 4 Console carrier commands 21 Console carrier Cont establishing a session from ULTRIX 19 to 20 establishing a session from VMS 18 to 19 user interface 20 Cover 4 Crosso...

Страница 60: ...otocol partitioned 27 MJ pin out 45 MJ port connector 4 N Network activity display 4 Network connector BNC 4 Network Control Program NCP 18 Networks CSMA CD 1 IEEE 802 3 1 O Operating altitude 43 dew...

Страница 61: ...43 relative humidity 43 temperature 43 Specifications environmental 43 power supply 44 Standalone installation 8 to 13 T Temperature 43 maximum rate of change 43 Troubleshooting 41 DECrepeater 90T in...

Страница 62: ......

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