Introduction; Isdn Reference Points - Patton electronics SmartNode Series Software Configuration Manual

SmartWare Software Configuration Guide

Introduction

This chapter provides an overview of ISDN ports and describes the tasks involved in configuring ISDN ports
in SmartWare.
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).

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.
points and where they are located is necessary for the configuration of the SmartNode ISDN ports.
Basic Rate Access Line point-to-point
TE
Phone
Basic Rate Access point-to-multipoint (S-bus)
TE
Phones
Primary Rate Access Line
TE
Phone
Legend:
TE Terminal Equipment (Phone)
NT1 Network Termination 1 (Modem)
NT2 Network Termination 2 (PBX)

Introduction

Figure 31 illustrates these reference points. The understanding of these reference
S T
NT2
PBX
TE
S/T
NT1
S T
NT2
PBX
Figure 31. ISDN reference points
U
NT1
U
U
NT1
LE Local Exchange
LT Line Termination
ET Exchange Termination
18 • ISDN Overview
LT ET
LE
Local Exchange
LT ET
V
LT ET
211