Module Backplane Connections - Nortel Meridian 1 Manual

9-30 Meridian 1 option 51 upgrades

Module backplane connections

553-3001-250 Standard 14.00 August 1996
Refer to Appendix B: "Terminal and modem connections" on page B-1 for
instructions on connecting terminals and modems to the option 51C.
Core/Net module backplanes, like all circuit boards, have a primary side and
a secondary side. The primary side, which faces the front of the module,
contains the primary shrouds that provide mating for the card edge
connectors. The secondary side of the backplane, which faces the rear of the
module, contains the secondary shrouds that provide mating for the cable
connectors. The columns of secondary shrouds are designated 18 through 12
(from left to right when looking at the rear of the backplane) and the cable
connector locations within each shroud are designated A through F (from top
to bottom).
Before you connect cables to the backplane, visually inspect the secondary
shroud connectors to make sure there are no bent pins. To connect cables:
1 Orient the cable connector so the strain relief paddle is to the right.
2 Partially insert the cable connector so its guides mate to the
corresponding backplane connector shroud.
3 Apply a small amount of pressure to push the cable connector straight
into the backplane connector. You will feel a distinct click when the
connector seats.
Pins may be bent or broken if you try to insert the cable connector at
an angle. Do not push the connector in any farther after you hear the
distinct click.
Using the cable extraction tool
To disconnect cables from the Core/Net module backplane, use the P0741489
Extraction Tool provided, located in the rear of the module (behind the I/O
safety panel).
CAUTION