- Enterasys Security Router User's Guide

XSR User’s Guide 11-1
11
Configuring Integrated Services Digital Network
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 will accept incoming
calls only if screened by the Dialer. The XSR’s ISDN services BRI and PRI lines via the following
NIMs on XSR 1800 and 3000 Series routers:
• 1, 2 or 4 port Channelized NIM card for PRI lines.
• 1 or 2 port BRI-S/T NIM card.
• 1 or 2 port BRI U NIM card.
Caution: Configuration of XSR 1200 Series routers is significantly different than for XSR 1800
and 3000 routers. For example, only interfaces FastEthernet 0, ATM 0, and BRI 0 (as well as
their sub-interfaces) are configurable on the XSR 1200 Series. For more information, refer to the
XSR 1220/1235 Getting Started Guide.