Nortel Meridian 1 Manual page 823

Leave the ENB/DIS switch on the 3PE cards set to ENB. If the cards
are disabled, the system will initialize.
41 On the QPC441 3PE cards in network shelf 1 of all groups, label and
disconnect the cables that were connected to the QPC215 SBE Cards in
CPU 1.
Note: Disconnect the cables, but do not remove them yet (as a back-out
contingency).
42 Install NTND14 cable pairs to connect the NT6D65 CNI cards to the
QPC441 3PE cards in the Network Modules (see Table 12-9 and
Figure 12-14). The cables connect to backplane connectors (secondary
shroud connectors) in the Core Module and to faceplate connectors on
the 3PE cards.
Upgrade system installation Upgrading to Meridian 1 system options
Upgrades to Meridian 1 option 81
CAUTION
12-59