Nortel Meridian 1 Manual page 502

If the option 21/21E and option 51C columns are positioned side-by-side, you
must install column spacer kits and route cables between the columns as
outlined in Meridian 1 system installation procedures (553-3001-210). If the
columns are not adjacent to each other, installing external cables between the
option 21/21E and option 51C is required to connect network loops in the
option 21/21E to network cards in the option 51C column. The number of
cables required depends on the number of network cards installed. The
required cables are listed below.
For NT8D04 Superloop Network cards:
— NT8D88 cables connect the option 51C network cards to the
Core/Network module I/O panels
— NT8D98 cables connect the I/O panels in the Core/Network module to
the IPE module I/O panels
— NT8D92 cables connect the peripheral controller to the IPE module I/O
panels
For QPC414 Network cards:
— NT8D86 cables connect the option 51C network cards to the
Core/Network module I/O panels
— NT8D73 cables connect the I/O panels in the Core/Network module to
the IPE/PE module I/O panels
— NT8D86 cables connect the peripheral controller to the IPE module I/O
panels (this cable type is also used to connect the QPC414 Network card
to Meridian Mail or DTI/PRI cards)
Refer to Upgrade engineering (553-3001-150) for additional information on
cable requirements.
An NT8D01 Controller card is provided to support the intelligent peripheral
cards in the new IPE module. If analog peripheral cards are used in the IPE
module, one NT8D21 Ringing Generator must be installed.
Upgrade system installation Upgrading to Meridian 1 system options
Meridian 1 option 21 upgrades 8-59