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Cabletron Systems MR-2000C User Manual

Manual is about: MULTI-PORT REPEATER

Summary of MR-2000C

  • Page 1

    Mr-2000c multi-port repeater user’s guide cvrbook page 1 friday, january 26, 1996 2:07 pm.

  • Page 2

    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 desc...

  • Page 3

    3.1 introduction .............................................................................................................. 3-1 3.2 installation check-out ....................................................................................... 3-1 3.3 using lanview...................................

  • Page 4

    Section 1 introduction 1.1 introduction. The cabletron systems mr-2000c multiport repeater is an easy to install meth- od of connecting two thin-net cable segments to a thick or thin-net cable segment, or to a fiber optic link segment. This repeater fully conforms to ieee 802.3 specifications and pr...

  • Page 5

    Delay times: (port 1 into port 2 out) start of packet: 1450 ns max. Collision to jam: 1550 ns max. Delay times: (port 2 into port 1 out) start of packet: 1150 ns max. Collision to jam: 1000 ns max. Preamble: input: minimum of 40 bits to a maximum of 64 bits re- quired. Output: 64 bits min. (last 2 b...

  • Page 6

    There is one receive , collision , and fault led for each segment. The leds for receive and collision are pulse stretched for increased viewing effect. Receive indicates that the repeater is receiving a data packet on that segment. Collision indicates that a collision is occurring on that seg- ment....

  • Page 7

    At rx or cp pair:0 to 30 v 0 to 5 v input sensitivity at rx or cp pair: +/-100 mv +/-75 to +/-150 mv waveform symmetry tx pair:+/-0.5 ns +/-1.0 ns output voltage into 78 ohms tx pair:+/-900 mv +/-55 mv interface connector type: 15 position d type receptacle. Pin 1 logic ref . Pin 9 collision - 2 col...

  • Page 8

    Output: (2) 3ag 1 amp fuses. Environmental requirements operating temperature: +5 ° to +40 ° c non-operating temperature: -30 ° to +90 ° c operating humidity: 5 to 95% (non-condensing) safety warning it is the responsibility of the person who sells the system to which the mr-2000c will be a part of ...

  • Page 9

    Section 2 preparation for operation 2.1 introduction. The mr-2000c multiport repeater is designed for quick and easy installation. No special skills or tools are required to install the repeater on an ethernet network. 2.2 network design guidelines. The following network design guidelines must be fo...

  • Page 10

    • the transceiver to which the mr-2000c will be connected to must meet ieee 802.3 standards and not have the sqe test function enabled. • the aui cable connecting the mr-2000c to the transceiver on the network must be ieee 802.3 type cable and must not exceed 50 meters in length. • from its source a...

  • Page 11

    Ensure that the external transceiver to which the mr-2000c will be connected does not have the signal quality error (sqe or “heart- beat”) test function enabled. The mr-2000c will not operate if the transceiver has the sqe test function enabled, and the network will be unusable. Refer to the applica...

  • Page 12

    Section 3 testing and lanview 3.1 introduction. This section lists procedures to test the mr-2000c multiport repeater after it has been connected to the network. A description of lanview and its function in troubleshooting phys- ical layer network problems is also given. 3.2 installation check-out. ...

  • Page 13

    7. Reconnect the terminator removed in step 6. 8. Check that the fault led for that segment goes off. 9. Repeat steps 6 through 8 for each segment connected to the mr-2000c. When the mr-2000c multiport repeater has successfully completed these tests, the repeater is ready for normal operation. If an...

  • Page 14

    Collision (collision) led this led normally flashes on and off to indicate that a collision is occurring on the indicated segment. The rate at which the led flashes will increase as network activity increases since more collisions are likely to occur. Fault (fault) led when the fault led is lit, thi...