Assigning Sparing Panel Connections For A 12-Port Ds3 Or E3 - Nortel Passport 15000 Hardware Description

192 Chapter 4 Control and function processors

Assigning sparing panel connections for a 12-port DS3 or E3

FP
241-1501-200 5.2S2
Logically assign a connection from a specific slot on an FP to a specific
connection on the sparing panel, and align it with a connection to each
connection of all equipment between the sparing panel and the far-end final
termination of the FP connection. Choose the sparing panel connections
before doing the cabling procedure. Record each port connection at the
faceplate of all equipment on a site record and on labels for the cables and
panels. Some sparing panel faceplates have writable labels for each
connection.
A sparing panel has a transmit (Tx) and receive (Rx) pair for each port. When
cabling Passport FPs and sparing panels, do Tx-to-Tx and Rx-to-Rx for all
equipment from the FP up to the far-end termination of the FP connection.
For the 12-port and 4-port cards that have the 8W8 mini-coax D-sub
connectors on the faceplate, the actual port numbers are not indicated on the
other end of the prefabricated signaling cables. The other end can be another
8W8 or a cluster of 8 BNC cables numbered 1 to 8. The pattern of pin (port)
numbering is the same for all mini-coax connectors. Use the following to
determine the port-to-port connections:
• the figure "Labels of mini-coax and BNC cable connections on a 4-port
NTHR58 cable assembly" (page 170)
• the figure "Port mappings of the 8W8 cable connections of a 12-port DS3
or E3 FP" (page 193)
• the table "Mapping an 8W8 and BNC cable to a termination panel from
a DS3Ch FR FP" (page 171)
Note that BNC 1 to 8 labels correspond to 8W8 pins A1 to A8 respectively,
but the actual port number depends on whether the cable is plugged into P0,
P1, or P2. In the figure "Port mappings of the 8W8 cable connections of a
12-port DS3 or E3 FP" (page 193), the port mappings of P0 apply to any of
the 4-port FPs with the 8W8 mini-coax D-sub connectors.
The 12-port DS3 or E3 sparing panel NTQS31 can operate as a fanout panel
for up to six DS3 or E3 FPs with 8W8 connectors, that is, with no sparing.