Nortel DMS-250 - About this Document; When to Use this Document; Intended Audience; How this Book Is Organized

Digital Switching Systems DMS-250 ISDN Reference Manual MWC14 (CSP14)
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About this document
This document serves as the primary rate interface (PRI) applications hand-
book for DMS-250 switch telecommunications managers and coordinators.
It describes the applications engineered for the PRI connection between a
DMS-250 switch and a private branch exchange (PBX).
When to use this document
This document provides references, procedures, and detailed information
about the following features:
• ISDN hardware
• ISDN messaging
• customer-deliverables
Intended audience
This document provides references, procedures, and detailed information
about ISDN hardware, messaging, PRI applications, and
customer-deliverable features. This document describes the DMS-250
switch hardware configuration and available software features; it is a
reference manual for operating company personnel using the ISUP
DMS-250 switch.
How this book is organized
This document contains the following chapters, followed by a list of terms.
• Chapter 1, “Introduction,” describes channels supported by PRI, defines
PRI applications, and gives an overview of the protocol for open systems
interconnection (OSI) and ISDN layers.
• Chapter 2, “DS-1 configurations,” provides an overview of how a
DMS-250 switch connects a DS-1 trunk to a single-line PBX; describes
the hardware configuration for the DS-1, commissioning details, and
performance and maintenance details. Included is an overview of digital
trunk controller versions and integrated trunk access.
• Chapter 3, “D-channel handler,” describes hardware configuration,
installation, and verification procedures. Also included information
about troubleshooting, test equipment, and PRI D-channel backup
facility.