Replace cable nt8d81ba with nt8d81aa – Nortel Networks NN43001-563 User Manual
Page 445
Replace cable NT8D81BA with NT8D81AA
445
Procedure 73
Preventing ground loops on connection to external LAN equipment
Step
Action
1
Connect the customer-provided shielded CAT5 Ethernet cable to the
external LAN equipment. Ensure that the external LAN equipment
is powered-up.
2
Use an ohmmeter to measure resistance to ground between the free
end of the shielded RJ-45 cable and the building ground.
The ohmmeter must measure Open to ground before plugging it
into the shielded RJ-45 coupler on the end of the NTMF94DA.
If it does not measure Open, install the unshielded RJ-45 coupler
(provided) on the end of the NTMF94DA to prevent ground loops
to external LAN equipment.
—End—
Replace cable NT8D81BA with NT8D81AA
This section explains how to replace the NT8D81BA cable with the
NT8D81AA cable and how to install the NTCW84JA special IPE filter.
Cables are designated by the letter of the I/O panel cutout (A, B, C, and so
on) where the 50-pin cable connector is attached. Each cable has three
20-pin connectors (16 positions are used), designated 1, 2, and 3, that
attach to the backplane. Using the designations described, the backplane
ends of the first cable are referred to as A-1, A-2, and A-3. The locations of
the cable connectors on the backplane are designated by the slot number
(L0 through L9 for NT8D11, L0 through L15 for NT8D37) and the shroud
row (1, 2, and 3). Using these designations, the slot positions in the first slot
are referred to as L0-1, L0-2, and L0-3.
In NT8D37BA and NT8D37EC (and later vintage) IPE modules, all 16 IPE
card slots support 24-pair cable connections.
shows the cable connections from the backplane
to the inside of the I/O panel.
Figure 155 "Backplane slot designations"
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563
01.01
Standard
Release 5.0
30 May 2007
Copyright © 2007, Nortel Networks
.