User`s guide

XSR User’s Guide 187
9
Configuring Integrated Services
Digital Network (ISDN)
This chapter outlines how to configure the Integrated Services Digital
Network (ISDN) Protocol on the XSR in the following sections:
 XSR ISDN features
 Understanding ISDN
 ISDN configuration topology
– BRI
– PRI
– Leased line
 ISDN configuration examples
– T1 PRI
– E1 PRI
– ISDN BRI
– BRI Leased
– BRI Leased PPP
– BRI Leased Frame Relay
 Call Status Call Codes
ISDN Features
The XSR’s BRI interface and T1/E1 controller in PRI mode acts as a utility that
can set up and tear down calls under the control of higher level functionality,
usually the Dialer. The ISDN module expects to receive from the Dialer a full
description of the call to be placed and will accept incoming calls only if
screened by the Dialer. The XSR’s ISDN services BRI and PRI lines via the
following NIMs:
 1, 2 or 4 port Channelized NIM card for PRI lines.