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ISDN disconnect code between two ISDN PRI controllers

Hello,
I have a voice gateway with two ISDN PRI controllers (VWIC-1MFT-E1); an ISDN PRI controller (Se0/1/0:15) is connected to PSTN and an ISDN PRI controller (Se0/2/0:15) is connected to an analog PBX.
The problem is the reporting of ISDN PRI ISDN controller (Se0/2/0:15) when I try to call a  non-existent number, from the analog PBX.
Infact, the ISDN disconnect cause code reported by ISDN PRI controller (Se0/1/0:15) is correct:

2907680: Mar 30 10:37:12.090 CEST: ISDN Se0/1/0:15 Q931: RX <- DISCONNECT pd = 8  callref = 0xA0B2
    Cause i = 0x8381 - Unallocated/unassigned number
    Progress Ind i = 0x8388 - In-band info or appropriate now available


but, the ISDN disconnect cause code reported by ISDN PRI controller (Se0/2/0:15) is wrong:

2907683: Mar 30 10:37:12.102 CEST: ISDN Se0/2/0:15 Q931: TX -> DISCONNECT pd = 8  callref = 0x940D
    Cause i = 0x8091 - User busy


In this way I can not understand from my analog PBX what is the correct reason of disconnection.
Here the output of debug isdn Q931 debug for a sample call:

Gw1#
2907673: Mar 30 10:37:04.386 CEST: ISDN Se0/2/0:15 Q931: RX <- SETUP pd = 8  callref = 0x140D
    Sending Complete
    Bearer Capability i = 0x8090A3
        Standard = CCITT
        Transfer Capability = Speech 
        Transfer Mode = Circuit
        Transfer Rate = 64 kbit/s
    Channel ID i = 0xA9838E
        Exclusive, Channel 14
    Calling Party Number i = 0xA1, '3'
        Plan:ISDN, Type:National
    Called Party Number i = 0x80, '93359999994'
        Plan:Unknown, Type:Unknown
    Low Layer Compat i = 0x8090A3
2907674: Mar 30 10:37:04.398 CEST: ISDN Se0/1/0:15 Q931: Applying typeplan for sw-type 0x12 is 0x0 0x1, Calling num 3
2907675: Mar 30 10:37:04.402 CEST: ISDN Se0/1/0:15 Q931: Applying typeplan for sw-type 0x12 is 0x0 0x1, Called num 3359999994
2907676: Mar 30 10:37:04.402 CEST: ISDN Se0/2/0:15 Q931: TX -> CALL_PROC pd = 8  callref = 0x940D
    Channel ID i = 0xA9838E
        Exclusive, Channel 14
2907677: Mar 30 10:37:04.402 CEST: ISDN Se0/1/0:15 Q931: TX -> SETUP pd = 8  callref = 0x20B2
    Sending Complete
    Bearer Capability i = 0x8090A3
        Standard = CCITT
        Transfer Capability = Speech 
        Transfer Mode = Circuit
        Transfer Rate = 64 kbit/s
    Channel ID i = 0xA1839F
        Preferred, Channel 31
    Progress Ind i = 0x8183 - Origination address is non-ISDN 
    Calling Party Number i = 0x81, '3'
        Plan:ISDN, Type:Unknown
    Called Party Number i = 0x81, '3359999994'
        Plan:ISDN, Type:Unknown
    Low Layer Compat i = 0x8090A3
2907678: Mar 30 10:37:04.690 CEST: ISDN Se0/1/0:15 Q931: RX <- CALL_PROC pd = 8  callref = 0xA0B2
    Channel ID i = 0xA9839F
        Exclusive, Channel 31
    Progress Ind i = 0x8288 - In-band info or appropriate now available
2907679: Mar 30 10:37:04.698 CEST: ISDN Se0/2/0:15 Q931: TX -> ALERTING pd = 8  callref = 0x940D
    Progress Ind i = 0x8288 - In-band info or appropriate now available
2907680: Mar 30 10:37:12.090 CEST: ISDN Se0/1/0:15 Q931: RX <- DISCONNECT pd = 8  callref = 0xA0B2
    Cause i = 0x8381 - Unallocated/unassigned number
    Progress Ind i = 0x8388 - In-band info or appropriate now available
2907681: Mar 30 10:37:12.090 CEST: ISDN Se0/1/0:15 Q931: call_disc: PI received in disconnect; Postpone sending RELEASE for callid 0xA29C
2907682: Mar 30 10:37:12.098 CEST: ISDN Se0/1/0:15 Q931: TX -> RELEASE pd = 8  callref = 0x20B2
2907683: Mar 30 10:37:12.102 CEST: ISDN Se0/2/0:15 Q931: TX -> DISCONNECT pd = 8  callref = 0x940D
    Cause i = 0x8091 - User busy
2907684: Mar 30 10:37:12.110 CEST: ISDN Se0/2/0:15 Q931: RX <- RELEASE pd = 8  callref = 0x140D
2907685: Mar 30 10:37:12.114 CEST: ISDN Se0/2/0:15 Q931: TX -> RELEASE_COMP pd = 8  callref = 0x940D
2907686: Mar 30 10:37:12.158 CEST: ISDN Se0/1/0:15 Q931: RX <- RELEASE_COMP pd = 8  callref = 0xA0B2
Gw1#


Thank you!

Everyone's tags (2)
3 REPLIES
Hall of Fame Super Gold

Re: ISDN disconnect code between two ISDN PRI controllers

Which exact IOS is this ?

And more important, are you using CM with MGCP or H.323 ?

New Member

Re: ISDN disconnect code between two ISDN PRI controllers

Cisco IOS Software, 2800 Software (C2800NM-SPSERVICESK9-M), Version 12.4(11)T4, RELEASE SOFTWARE (fc3)

H323 of course ...

Hall of Fame Super Gold

Re: ISDN disconnect code between two ISDN PRI controllers

Try 12.4(22) YB5 or perhaps some 15.0

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