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XSR Users 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.
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