Signaling For The Rsc-M; Signaling And Communications Types - Nortel DMS-100 Series Reference Manual

5-2 Introduction to Remote Switching Center Multi-access
Table datafill to CAS link associations
In field LEN of table LNINV, subfield
BAY relates to field GROUP in table
GPPTRNSL
4
5

Signaling for the RSC-M

Virtual remote nodes that have AN capabilities and use CAS protocol,
communicate with the Digital Multiplex System (DMS). The virtual remote
nodes communicate with the DMS over PCM30 links that terminate on the
RSC-M. Channel associated signaling protocol defines the actions between
non-concentrating ANs and the DMS.
This section explains how the British Telephone user part (BTUP) trunk
carrier and DC5 protocol, and the BTUP to CAS Loop Start work together.
The DC5 signaling protocols include two variants: the DC5A and the DC5A
with delay dial (DC5ADD).
This section describes the protocols that the RSC-M uses for communication
and subscriber services. The RSC-M protocols are:

Signaling and communications types

An RSC-M line is not a physical line circuit. An RSC-M line is a 64 Kbit/s
channel in a 2 Mbit/s PCM30 carrier.
Channel associated signaling ANs use call supervisory signaling. Call
supervisory signaling complies with the CAS protocol of ABCD bits on
time-slot 16 (TS16) of each PCM30 link. Messaging channels are assigned
to the same link as the associated bearer channel. Data are entered in the
dedicated channels as though the carrier channels are physical line cards.
The bearer channels provide virtual line circuits. The circuits support voice
calls through connections to dial pulse (DP) or DTMF analog subscriber
stations. The circuits also support voice calls through connections to a
private branch exchange (PBX). This PBX connects to an AN. These
297-8331-815 Standard 10.01 August 1999
(continued)
the CAS protocol for plain old telephone service (POTS)
the DC5A and the DC5ADD protocols
the Custom Local Access Signaling Services (CLASS) protocol with
dual-tone multi-frequency (DTMF) control
Explanation
Refers to P-side links 32 to 39
Refers to P-side links 40 to 47
—end—