Chapter 4 Testing And Troubleshooting - Cabletron Systems TRMIM-22 Installation Manual

Token ring media interface modules
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TESTING AND TROUBLESHOOTING
This section contains procedures to verify that the connections
between the concentrator module and the token ring stations are
functioning properly. A description of the LANVIEW LEDs is also
provided.
4.1 INSTALLATION CHECKOUT
Perform the following to check the installation of the concentrator
module:
1. Be sure that the token ring stations and the MMAC match the
AC power source (120 Vac or 240 Vac) and are powered on.
2. Trace the ring path through the network, to be sure that there
are no breaks in the ring and that it is free from logical design
errors. While tracing the ring:
a. Check each cable connection at the MIM.
b. Verify the pinouts for every connection.
c.
Check the cable conductors for continuity. Cable testers are
available for this task.
d. Check that cable connections at patch panels and wall plates
are secure.
3. Check the network ring speed:
a. Verify that the ring speed matches the station and cable
specifications mentioned in Chapter 2, Installation
Requirements/Specifications.
b. Be sure that all devices in the ring network are set to the
same ring speed. Check all MIMs and stations in the
network.
TESTING AND TROUBLESHOOTING
CHAPTER 4
Page 4-1

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