Nortel Meridian 1 Manual page 556

Network cables are required to connect network loops in the cabinet to
network cards in the column. The number of cables required depends on the
number of network cards installed. These are the cables:
— NT8D88 cables that connect network cards to the Core/Network module
I/O panels
— NT8D98 cables that connect the I/O panels in the Core/Network module
to the IPE module I/O panels
— NT8D92 cables that connect the peripheral controller to the IPE module
I/O panels
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 8-113