Call conferencing doesn't work

Unanswered Question
Jul 15th, 2009
User Badges:

We have CCM 3.3 (i know, we are upgrading to the newer version of 7.X soon) and when we try to do a call conference with 3 people in the office, it just doesn't work. What service in CCM is this using?

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Jaime Valencia Wed, 07/15/2009 - 13:02
User Badges:
  • Cisco Employee,
  • Hall of Fame,


IPVMS, try resetting the CFB from GUI, if it doesn't work bounce the service. I'm assuming you're using SW CFB, for HW CFB you might try no sccp/sccp



if this helps, please rate

cisco_goh Wed, 07/15/2009 - 21:12
User Badges:

In version 6.0, i restart the service “Cisco IP Voice Media Streaming App”.

Enable CallManager detailed trace, you should find "out of resource" or simulator message.

Conferencing resource can be configured as a profile on the Voice Gateway if you have enough DSP resource. How to find out?

Do the "Max sess ?" under the "dspfarm profile 1 conference", you only need one!!

You can also do a "sho inv" - look at PBDM's.

voice-card 0


dsp services dspfarm


dspfarm profile 1 conference

codec g711ulaw

codec g711alaw

codec g729ar8

codec g729abr8

codec g729r8

codec g729br8

conference-join custom-cptone jointone

conference-leave custom-cptone leavetone

associate application SCCP

Max sess ?


sccp ccm group 500

bind interface GigabitEthernet0/1.5

associate ccm 500 priority 1

associate profile 1 register GW-CNF


sccp local GigabitEthernet0/1.5

sccp ccm identifier 500 version 4.1



Now add "Hardware conferance bridge" "GW-CNF" in CallManager and add to Resource Group for phones. Restart CallManager.

After Restart check CFB registration, and test.

julienf28 Thu, 07/16/2009 - 07:56
User Badges:

Figured out that the conference bridge isn't registered to the CM. what I need now is the correct syntax in the VGP to reset the PVDM DSPfarm. Anybody can help?


This Discussion