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Cabletron Systems MR-2000C User Manual

Multi-port repeater
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MR-2000C
MULTI-PORT REPEATER
USER'S GUIDE

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Summary of Contents for Cabletron Systems MR-2000C

  • Page 1 MR-2000C MULTI-PORT REPEATER USER’S GUIDE...

  • Page 2: Table Of Contents

    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 INCIDEN- TAL, INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT NOT LIMITED TO, LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL OR...
  • Page 3 USING LANVIEW... 3-2 Cabletron Systems warrants that the MR-2000C shall be free from defect in material and workmanship for a period of one (1) year from the date of initial shipment by Cabletron Systems. The foregoing warranty does not apply to any products which have been subjected to misuse, neglect, accident, or modification.

  • Page 4: Section 1 - Introduction

    (AUI) cable is then used to connect the external transceiver to an AUI port, also located on the rear of the repeater. All three segments are linked when they are attached to the repeater. The MR-2000C will transmit re-timed data packets, regenerate preambles, extend collision fragments, automatically par- tition problem segments, and automatically reconnect non-problem segments.
  • Page 5 Indicates that the repeater is receiving power. Indicates that the repeater is providing power to the transceiver connected to the repeater. Indicates the MR-2000C is propagating a collision on one segment to the other segment connected to the repeater. NOTE...
  • Page 6 Indicates that a collision is occurring on that seg- ment. Indicates that the MR-2000C has electrically dis- connected that segment from the network because of a cable fault or 32 consecutive collisions. BNC receptacle, with gold center contacts, for use with BNC type plugs and RG-58A/U thin-net ca- ble.
  • Page 7 8 Logic Ref. Connector Shell: POWER SUPPLY REQUIREMENTS Parameter Input Voltage Vac 47-63 Hz Input voltage is user selectable. The MR-2000C is shipped ready for use with 120 volt AC input. 120 Volts Selected: 220 Volts Selected: Input Current: POWER SUPPLY REQUIREMENTS (CONT)

  • Page 8: Related User Manuals

    SAFETY It is the responsibility of the person who sells the system to which the MR-2000C will be a part of to ensure that the total 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.

  • Page 9: Section 2 - Preparation For Operation

    Use of non-standard cable lengths may result in impedance mismatches causing reflections to occur. These reflections may cause data errors. • Each thin-net cable segment that will be connected to the BNC port on the MR-2000C must be no longer than 185 meters (606 feet) in total length.

  • Page 10: Site Selection Guidelines

    • 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.
  • Page 11 11. Using the cable ties provided, strain relief all cables and the power cord to the cable support on the backside of the repeater. The MR-2000C is now ready for operation. It is recommended that the installation be tested prior to trans- mitting data. Refer to Section 3.2 - INSTALLATION CHECK-OUT .

  • Page 12: Section 3 - Testing And Lanview

    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.
  • Page 13 When lit, this LED indicates that the MR-2000C is providing power to the external transceiver con- nected to the MR-2000C. If this LED is not lit, power is not being provided to the transceiver and the problem may be in the MR-2000C.
  • Page 14 Fault (FAULT) LED When the FAULT LED is lit, this indicates that the MR-2000C has disconnected that segment from the network because 32 consecutive collisions have occurred on the segment, or because the collision detector was on for longer than approximately 2.4 ms. The FAULT LED will go out after one packet...

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