Chapter 15: 2.0 Mb ISL maintenance
Contents
This section contains information on the following topics:
Overview on page 165
ISL maintenance on page 174
Overview
This chapter provides a DCHI reference list of D-channel commands, an technical document
reference for maintenance messages, and maintenance testing information.
This chapter provides the information required to implement ISL
on the system including:
• hardware and software installation
• implementation of components needed to provide basic call service
ISDN features are treated separately in the chapter devoted to ISDN feature
implementation.
This chapter assumes that ESN implementation is already in place. It also assumes that the
reader has a basic understanding of NARS and CDP.
Two modes of ISL are available: shared and dedicated. This chapter covers ISL installation in
dedicated mode using dedicated and leased lines. Shared mode installations are done
according to the instructions supplied for PRI, with the noted exceptions.
ISL hardware requirements
ISL, regardless of the operation mode, uses analogue or digital
TIE lines as B-channels.
ISDN Primary Rate Interface Maintenance November 2011 165
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