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ISDN PRI Installation
42
PRI installation: RT
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 an empty network shelf, along with the
power converter card, depending on the shelf type. See
Tables 49
and
50
for
card slot positions.
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,
refer to
“PRI cabling information” on page 169
.
See
and
for cabling arrangements with and without an Echo
Canceller.
The recommended order of PRI connections for the Universal I/O Panel
(P0715058) for NT8D11 CE/PE Module (system option 21) follows:
— with Echo Canceller, J4 and J12 for the T1, J8 for the Echo Canceller
— without Echo Canceller, J4, J8, and J12 for the T1s