Conference problem on CM 6.1

Unanswered Question
Jun 29th, 2009

Hi,

I am having problem with conferencing on Call Manager 6.1 . I have three sites with one central Call Manager and I am using software conference bridge. Two sites are working fine but from one site whenver I try to make conference call by calling external number, the call gets disconnect on the first call. The Codec configuration on all the sites are same and gateway configuration is also same. Anybody has any idea on this type of issue?

Thanks

I have this problem too.
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James Hawkins Tue, 06/30/2009 - 06:00

First thing to check would be that the devices at the problem site have media resource group lists that include the software conference resource.

mrahman0302 Tue, 06/30/2009 - 09:17

Hi James,

The media resource group list includes the conference resource. I ran the debug on the problem site gateway and found resource unavailable. Here is the debug report:

Bearer Capability i = 0x8090A2

Standard = CCITT

Transfer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0xA98396

Exclusive, Channel 22

Display i = 'Tommi Citrix Phone'

Calling Party Number i = 0x0081, 'yyyy'

Plan:Unknown, Type:Unknown

Called Party Number i = 0x80, '1xxxxxxxxxx'

Plan:Unknown, Type:Unknown

*Jun 30 15:00:03.058: ISDN Se0/0/0:23 Q931: RX <- CALL_PROC pd = 8 callref = 0x

9CD8

Channel ID i = 0xA98396

Exclusive, Channel 22

*Jun 30 15:00:03.958: ISDN Se0/0/0:23 Q931: RX <- PROGRESS pd = 8 callref = 0x9

CD8

Cause i = 0x82FF - Interworking error; unspecified

Progress Ind i = 0x8281 - Call not end-to-end ISDN, may have in-band inf

o

*Jun 30 15:00:08.010: ISDN Se0/0/0:23 Q931: RX <- CONNECT pd = 8 callref = 0x9C

D8

*Jun 30 15:00:08.014: %ISDN-6-CONNECT: Interface Serial0/0/0:21 is now connected

to 14032752006 N/A

*Jun 30 15:00:08.014: ISDN Se0/0/0:23 Q931: TX -> CONNECT_ACK pd = 8 callref =

0x1CD8

*Jun 30 15:00:14.038: %ISDN-6-DISCONNECT: Interface Serial0/0/0:22 disconnected

from 14037962139 , call lasted 40 seconds

*Jun 30 15:00:14.038: ISDN Se0/0/0:23 Q931: TX -> DISCONNECT pd = 8 callref = 0

x1CD7

Cause i = 0x80AF - Resource unavailable, unspecified

*Jun 30 15:00:14.074: %ISDN-6-DISCONNECT: Interface Serial0/0/0:21 disconnected

from 14032752006 , call lasted 6 seconds

*Jun 30 15:00:14.078: ISDN Se0/0/0:23 Q931: TX -> DISCONNECT pd = 8 callref = 0

x1CD8

Cause i = 0x80AF - Resource unavailable, unspecified

*Jun 30 15:00:14.110: ISDN Se0/0/0:23 Q931: RX <- RELEASE pd = 8 callref = 0x9C

D7

*Jun 30 15:00:14.114: ISDN Se0/0/0:23 Q931: TX -> RELEASE_COMP pd = 8 callref =

0x1CD7

*Jun 30 15:00:14.158: ISDN Se0/0/0:23 Q931: RX <- RELEASE pd = 8 callref = 0x9C

D8

*Jun 30 15:00:14.162: ISDN Se0/0/0:23 Q931: TX -> RELEASE_COMP pd = 8 callref =

0x1CD8

Appreciate your help.

paul.higgsboyo@... Wed, 07/01/2009 - 01:18

Try ringing the external number first and then pressing the "?" button twice to see what CODEC is in use to the external destination. All the problems I have ever seen with software conferencing is to do with CODEC mismatches.

mrahman0302 Thu, 07/02/2009 - 06:54

I found that codec is being used G729 when I have called external number. The site I am having problem is set to G711. Should I change it to G729?

Thanks

paul.higgsboyo@... Thu, 07/02/2009 - 14:46

software conference bridges only support g711 so you need to check why that one site is making external calls using g729. check the region isnt configured to use g729 locally and maybe recheck the config on the gateway has a voice class codec that can negotiate g711. also, is the gateway being used to make the call on the same site as the phone you cant perform the conference from.

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