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ISDN PRI Installation
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PRI installation: ST, STE, 21, 21E
X11 release 18 requires ST and 21 upgrade to STE or 21E. This chapter
includes the PRI installation procedure for all four systems.
PRI circuit card locations
Each PRI circuit card requires two adjacent slots on a shelf. PRI cards can be
placed in the following slots:
— for ST/STE, slots in Common Equipment (CE) shelf and DTI Expansion
Tier
— for 21/21E, slots in NT8D11 Common/Peripheral Equipment Module
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.
