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Engineering recommendations
This chapter provides recommendations to simplify the configuration and
engineering of the ISDN digital trunk controller (DTCI) primary rate
interface (PRI).
PRI configurations
The configurations for single DS-1 per PRI, single PRI per DS-1, and the
usage of non-PRI channels on the DS-1 switch are given in the following
paragraphs.
Single DS-1 per PRI
In this release, multiple DS-1s can contain B-channels that are controlled by
a single PRI D-channel.
Single PRI per DS-1
The DMS-250 switch supports multiple D-channels and PRIs within a single
DS-1.
Usage of non-PRI channels on DS-1
Any channels within the DS-1 that are not used as B-channels (that is,
controlled by the D-channel for circuit-switched calls) need not be left idle
(that is, containing idle code, hex 7F). The DTCI allows these non-PRI
channels to be provisioned as a per-trunk signaling (PTS) trunk. In other
words, any AB-trunk supported by DMS-250 switch can be datafilled on the
non-PRI channels.
D-channel handler to DS-1 mapping
There exists a one-to-one mapping between the D-channel handler and the
DS-1, as datafilled in table TRKSGRP.
Recommended D-channel handler to DS-1 mapping on DMS-250 DTCI
This does not apply; the mapping is determined by the datafill.
Digital Switching Systems DMS-250 ISDN Reference Manual MWC14 (CSP14)
11-1
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