Signaling For The Star Remote System; Introduction; Voice And Data Communications; Ds-1 Superframe Format - Nortel DMS-100 Series Maintenance Manual

3 Signaling for the Star Remote System

Introduction

This section addresses the following aspects of Star Remote System
functionality:
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Voice and data communications

Voice and data calls are transferred between the host peripheral module (PM)
and the Star Hub, and the Star Hub and Star Module over DS-1 Superframe
format links using extended Superframe format (ESF) signaling. The host PM
can be a
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DS-1 Superframe format

Information transmits between the host PM and Star Hub over DS-1 links. The
Star Module and Star Hub communicate over DS-1 links. DS-1 links operate
at a rate of 1.544 Mbyte/s with a sampling frequency of 8000 frames each
second.
The DS-1 frame contains 24 8-bit bytes and a framing bit for a total of 193 bits
for each frame. The 8-bit bytes fit into time slots or channels for a total of 24
channels in each frame. The framing bit goes before the 24 channels. These
channels carry either speech information, signaling information, or operations
information. The following figure shows the format of a DS-1 frame.
voice and data communications
integrated services digital network (ISDN) Basic Rate Interface (BRI)
signaling (functional signaling only, no support for stimulus signaling)
communications protocols
signaling functions and capabilities
line trunk controller (LTC) with the NTMX77AA unified processor or
NTSX05AA processor (LTC+)
line group controller (LGC) with the NTMX77AA unified processor
(LGC+)
remote cluster controller 2 (RCC2) with an NTAX74AA processor
DMS-100 Family NA100 Star Remote System XPM15 and up
3-1