This document provides information on how to configure ISDN BRI for
"Anlagenanschluss" in Germany.
There are no specific requirements for this document.
This document is not restricted to specific software and hardware
The information in this document was created from the devices in a
specific lab environment. All of the devices used in this document started with
a cleared (default) configuration. If your network is live, make sure that you
understand the potential impact of any command.
Technical Tips Conventions for more information on document
In Germany (and possibly in some other countries), local telephone
companies offer an ISDN line called "Anlagenanschluss". This line, or very
often a "hunt-group" of multiple lines, refers to a group of lines with the
same subscriber number. Anlagenanschluss intends to connect only one ISDN
device such as a private branch exchange (PBX).
This section describes how you can use these ISDN lines on a Cisco
In order to use Anlagenanschluss on a Cisco router, configure the
isdn static-tei 0 interface configuration command on
the BRI interface(s) as shown here:
Router# configure terminal
Router(config)# interface bri 0
Router(config-if)# isdn static-tei 0
Warning: Interface must be cleared after reconfiguring the TEI.
!--- Issue the shutdown and no shutdown commands
!--- to activate new TEI configuration.
Router (config-if)# shutdown
Router (config-if)# no shutdown
Without the isdn static-tei 0 command, the
ISDN Layer 2 status gets stuck in the "TEI_ASSIGNED" state, and the output of
debug isdn q921 command repeats these two
RX SABMEp c/r = 1 sapi = 0 tei = 0
RX IDCKRQ ri = 0 ai = 0