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ISDN PRI Installation
54
PRI installation: NT, 51/51C, 61/61C
PRI circuit card locations
Each PRI circuit card requires two adjacent slots on a shelf. As many as five
circuit cards can be plugged into any empty network shelf, along with the
power converter card, depending on the shelf type. See
Tables 49
and
50
for
card slot positions.
If additional network shelves are required, use the NT8D35 Network Module.
See
Meridian 1 system installation procedures
(553-3001-210).
Cable requirements
Shielded 22 AWG (0.644 mm) cable is recommended for connecting the PRI
to the cross connect point. This cable consists of two shielded twisted-pair
conductors and two shields.
The transmit and the receive pairs must be individually shielded and enclosed
in a polyvinyl jacket. This type of cable is commonly referred to as
“6-conductor” cable. T1 cable shielding should be grounded at the
cross-connect point.
To manufacture cables of different lengths than the standard cables provided,
see
“PRI cabling information” on page 169
.
The recommended order of PRI connections for the Universal I/O Panel
(P0715058) for the NT6D39 CE/Network Module (system option 51/61) is as
follows:
— with Echo Canceller, J4, J12, and J24 for the T1 and J8, J20, and J28 for
the Echo Canceller
— without Echo Canceller, J8, J12, J20, J24, and J28 for the T1s