ISDN Port Configuration
273
28 ISDN PORT CONFIGURATION
This chapter provides an overview of SmartNode ISDN ports and describes the tasks involved in
configuring ISDN ports in SmartWare. For detailed information on syntax and usage guidelines for
the commands listed under Configuration Tasks refer to Chapter 19, “Interface ISoIP Mode”, in the
SmartWare
Command Reference Guide.
This chapter includes the following sections:
•
Introduction
•
Warnings
•
ISDN Port Configuration Tasks
•
Examples
28.1 Introduction
ISDN ports are the physical ISDN connections on the SmartNode devices. There are two types of
ISDN ports:
•
The ISDN basic rate interface (BRI), and
•
The ISDN primary rate interface (PRI).
A BRI port supports two 64kbit/s B-channels for switched voice or data connections, one 16kbit/s D-
channel for signaling and always-on data transfer. BRI ports are sometimes called S0 ports. The
related PSTN access service is also called Basic Rate Access (BRA).
The PRI port supports thirty 64kbit/s B-channels, one 64kbit/s D-channel and one synchronization
timeslot on a standard E1 (G.704) physical layer. PRI ports are also called S2m ports. The related
PSTN access service is also called Primary Rate Access (PRA).
28.1.1 ISDN Reference Points
The ISDN standards define a number of reference points on the interfaces between the various
equipment types on an ISDN access line. Figure
illustrates these reference points. The
understanding of these reference points and where they are located is necessary for the configuration
of the SmartNode ISDN ports.
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