Nortel Meridian 1 Manual page 30

3 Connect the external cable from the Core/Network module I/O panel
connector, labeled "PRI/DTI" (if equipped), to the network interface.
4 Install one PRI/DTI card in this module as the primary clock reference,
and install the rest of the PRI/DTI cards in the peripheral cabinet CE
shelf. For installation procedures, refer to Circuit card installation and
testing (553-3001-211).
5 Verify that the PRI/DTI cards in the peripheral cabinet CE shelf are
connected to the MDF.
6 Connect all external cables from the MDF to the PE shelf connectors on
the cabinet I/O panels and the IPE module I/O panels. Refer to the
appropriate procedure in Meridian 1 system installation procedures
(553-3001-210) for IPE module cabling procedures.
Upgrade system installation Upgrading to Meridian 1 system options
SL-1 A, M, S, and MS system upgrades 2-17