Cisco Cisco IOS Software Release 12.4(6)T

This section provides the following example:

The following is a typical configuration that enables SAPI 0 procedures that accept X.25 calls on the 
ISDN D channel, on ISDN BRI interface 0:

isdn switch-type basic-ntt

x25 routing

!

interface BRI0

 no ip address

 no ip directed-broadcast

 dialer load-threshold 1 either

 isdn switch-type basic-net3

 isdn x25 dchannel q931-broadcast

!

interface BRI0:0

 ip address 192.168.1.1 255.255.255.252

 no ip directed-broadcast

 no ip mroute-cache

 x25 address 12503372501

 x25 htc 2

 x25 map ip 192.168.1.2 2231146

!

The debug isdn q931, debug isdn events detail, and debug isdn mgmnt EXEC commands have been 
enhanced for Cisco IOS Release 12.4(6)T, to provide information about accepting X.25 calls on the 
ISDN D channel. For purpose of example, bold type in the following output indicates reports seen when 
the isdn x25 dchannel interface configuration command with the optional q931-broadcast keyword is 
enabled:

Router# debug isdn q931

*Sep 28 12:34:29.739: ISDN BR1/1 Q931: RX <- SETUP pd = 8  callref = 0x5C (re-assembled) 

        Bearer Capability i = 0x88C0C2E6 

                Standard = CCITT 

                Transfer Capability = Unrestricted Digital 

                Transfer Mode = Packet 

                Transfer Rate = Packet - not specified 

Router(config-if)# isdn switch-type basic-ntt

Specifies the Japanese NTT or European NET3 central 
office switch type on the ISDN interface.

Router(config-if)# isdn x25 dchannel q931-broadcast

Key ISDN interface command that enables Q.931 
SAPI 0 procedures so that the ISDN D channel will 
correctly accept X.25 calls. See the examples in the 
following section for other commands that are typically 
entered to configure the BRI interface.