Unable to conference more than 4 people in H323.

[Siddharam M]

Hi,

i have a CCM cluster located in my central office. and i have a H323 gateway's in all my locations.

I have selected local router as Conference bridge for conferences. I can add upto 4 people in the conference without any issue but when i am trying to add 5th person in conf the 1st participant gets dropped automatically.

I have already set the Maximum ad hoc conference value to 8

CCM v8.5

Router : 2911 and PVDM3-64

sccp ccm group 1
 associate ccm 1 priority 1
 associate ccm 2 priority 2
 associate profile 1 register CFB00077deac9d0
 registration retries 5
 registration timeout 8
 keepalive retries 7
 keepalive timeout 50
 connect retries 5
 connect interval 60
 switchback method graceful
 switchback interval 120
!
sccp ccm group 2
 associate ccm 1 priority 1
 associate ccm 2 priority 2
 associate profile 2 register MTP00077deac9d0
 registration retries 5
 registration timeout 8
 keepalive retries 7
 keepalive timeout 50
 connect retries 5
 connect interval 60
 switchback method graceful
 switchback interval 120
!
dspfarm profile 2 transcode  
 codec g711ulaw
 codec g711alaw
 codec g729ar8
 codec g729abr8
 codec g729br8
 codec g729r8
 maximum sessions 4
 associate application SCCP
!
dspfarm profile 1 conference  
 codec g711ulaw
 codec g711alaw
 codec g729ar8
 codec g729abr8
 codec g729r8
 codec g729br8
 maximum sessions 3
 associate application SCCP
!

Can someone help me on this..

Thanks in advance.

[Manish Gogna]

The default max no of conference participants on IOS CFB is 8. If you already have the cucm service parameter also set to a higher number, then in both the scenarios ( cucm CFB or IOS CFB ) , then you should be able to add more than 4 participants. Can you try a test conference with CUCM based CFB by adjusting the Device pool / MRGL and see if that works or not. A detailed ccm trace for a failed call when adding 5th participant to the conf would be helpful to see what could be going wrong.

HTH

Manish

[Siddharam M]

Hi Manish,

I can see below error logs in the CCM trace.. AllocateMtpResourceReq failed is the msg i am getting.

But i don't know what is exactly it means..

MediaTerminationPointControl(3)::getResourcesAllocated -- No matching caps for either side A or side B, MTP not allocated|2,100,17,145046.2^10.18.33.207^Port 20085

MediaTerminationPointControl(3)::getResourcesAllocated -- match1=0 match2=0|2,100,17,145046.2^10.18.33.207^Port 20085
MediaTerminationPointControl(3)::getResourcesAllocated -- allocateErrBitset=0x60|2,100,17,145046.2^10.18.33.207^Port 20085
MediaTerminationPointControl(3)::SendMTPResourceErrToSender - ERROR  AllocateMtpResourceReq failed -- Ci=36867484, errBitset=0x64|2,100,17,145046.2^10.18.33.207^Port 20085
MediaResourceCdpc(159561)::resource_rsvp_AllocateMtpResourceErr Device=MTP_3 deviceCapIntersec=0|2,100,17,145046.2^10.18.33.207^Port 20085
MediaResourceCdpc(159561)::adjustDeviceTblMTP - mCepn=77b46497-ff7e-46ac-93e8-5687856b42c7, allocateErrBitset=0x64, devCapIntersect=0x0, mandatoryCaps=0x0, resourceCount=1|2,100,17,145046.2^10.18.33.207^Port 20085
MediaResourceCdpc(159561)::adjustDeviceTblMTP - Codec Mismatch|2,100,17,145046.2^10.18.33.207^Port 20085
MediaResourceCdpc(159561)::removeDevicePidTableEntry - cepn=77b46497-ff7e-46ac-93e8-5687856b42c7 deviceName=MTP_3 deviceTblSize=3|2,100,17,145046.2^10.18.33.207^Port 20085
MediaResourceCdpc(159561)::waiting_MrmAllocateMtpResourceReq - CI=36867484 Count=1 TryPassThru=0|2,100,17,145046.2^10.18.33.207^Port 20085

Issue  is happening only to my remote locations, the main office where my CUCM cluster is located i have not observed any issue.

I am attaching my g/w router config. pls let me know if any issue related to config.

Thanks,

Sid