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Community Member

Trace Help

Hi,

I have a site where users are reporting problems dialing numbers. They hear the annunciator telling them their call 'cannot be completed as dialled...', this is not a CSS issue as the call proceeds through the MGCP 2821 gateway router.

The dial string appears correct as I have checked 'isdn q931' on the gateway router.

The same call can be made from a personal/business mobile phone and eventually will suceed from the Cisco phone after several attempts.

We have 3 x other sites that put their calls out of the same MGCP 2821 Gateway router (30 channel PRi E1) and there are no reports of the same issue.

98% of staff on the site in question are using the old 7912G handsets.

My question is;

What trace do I need to set up on CUCM in order to try and trouble-shoot what happens when the call fails?

For information this issue has been happening on CUCM 6.0/6.1/7.0 and now 7.1 (we have been upgrading CUCM over the last 2 weeks in prepartion for OCS/CUPS integration).

Regards Kim.

3 REPLIES
Hall of Fame Super Gold

Re: Trace Help

Can you begin posting the complete output of "debug ISDN Q931" for the failed call ?

Community Member

Re: Trace Help

Thanks p.b.

This is the debug. Please note that the 900000 is 9 for an outside line, the next 5 digits are a 'Virtual Fixed Link' code that sends the mobile call over a provider network at a reduced tariff. This code is prepended to the dialled mobile number.

I have looked at this carefully and have now notified the Virtual Fixed Link help desk as they may have an intermittent fault in not recognising this code.

In the meantime I have removed this code from any mobile number dialled by staff to see if calls are successful.

1506233 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:02:14 478447: *Aug 31 11:08:44.598: ISDN Se0/0/0:15 Q931: RX <- RELEASE_COMP pd = 8 callref = 0x899B

1506232 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:02:14 478446: *Aug 31 11:08:44.582: ISDN Se0/0/0:15 Q931: TX -> RELEASE pd = 8 callref = 0x099B

1506231 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:02:14 478445: Cause i = 0x809C - Invalid number format (incomplete number)

1506230 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:02:14 478444: *Aug 31 11:08:44.550: ISDN Se0/0/0:15 Q931: RX <- DISCONNECT pd = 8 callref = 0x899B

1506049 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:02:08 478443: Facility i = 0x9FAA06800100820100A3060201DE020103

1506048 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:02:08 478442: *Aug 31 11:08:38.678: ISDN Se0/0/0:15 Q931: TX -> FACILITY pd = 8 callref = 0x8A06

1506047 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:02:08 478441: Facility i = 0x9FAA06800100820100A1210201DE0201043080120439393932A5800A01041208383233313938303100000000

1506046 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:02:08 478440: *Aug 31 11:08:38.674: ISDN Se0/0/0:15 Q931: RX <- FACILITY pd = 8 callref = 0x0A06

1505797 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:01:58 478439: Exclusive, Channel 4

1505796 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:01:58 478438: Channel ID i = 0xA98384

1505795 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:01:58 478437: *Aug 31 11:08:29.558: ISDN Se0/0/0:15 Q931: RX <- SETUP_ACK pd = 8 callref = 0x899B

1505794 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:01:58 478436: Plan:Unknown, Type:Unknown

1505793 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:01:58 478435: Called Party Number i = 0x80, '900000XXXXXXXXXXX'

1505792 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:01:58 478434: Plan:Unknown, Type:Unknown

1505791 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:01:58 478433: Calling Party Number i = 0x0081, '8689'

1505790 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:01:58 478432: Facility i = 0x9FAA06800100820100A114020100020100800C4B61746965204D617274696E

1505789 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:01:58 478431: Exclusive, Channel 4

1505788 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:01:58 478430: Channel ID i = 0xA98384

1505787 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:01:58 478429: Transfer Rate = 64 kbit/s

1505786 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:01:58 478428: Transfer Mode = Circuit

1505785 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:01:58 478427: Transfer Capability = Speech

1505784 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:01:58 478426: Standard = CCITT

1505783 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:01:58 478425: Bearer Capability i = 0x8090A3

1505782 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:01:58 478424: *Aug 31 11:08:29.490: ISDN Se0/0/0:15 Q931: TX -> SETUP pd = 8 callref = 0x099B

Thanks for the response.

Hall of Fame Super Gold

Re: Trace Help

Correctly, you have to complain to telco as they are the one that refuse the call:

1506231 XXX.XXX.XXX.XXX local7-debug 2009-08-31 11:02:14 478445: Cause i = 0x809C - Invalid number format (incomplete number)

In the meanwhile, you can add "isdn sending-complete" and "no isdn outgoing-ie facility" to make the setup perfectly clean.

Please send debugs taken from router directly for ease of reading.

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