Wednesday, April 20, 2011

How to add a hardware conference bridge to callmanager


For this configuration i used a 2911 router with dsp's configured as a dspfarm for CUCM server. You have to configure that if you want to do a meet me conference between 2 ip phones that uses different codecs: one g711 and the other g729. So, the router configuration is the following:

voice-card 0
dsp services dspfarm
sccp local gigabitEthernet 0/0
sccp ccm identifier 1 version 7.0+  // is the address of CUCM server

sccp ccm group 1
associate ccm 1 priority 1
associate profile 1 register 2911voice            //2911voice must be THE SAME on CUCM server config

dspfarm profile 1 conference           //specify the use of dspfarm
codec g711ulaw               //supported codecs
codec g729br8
maximum sessions 1         //support only 1 conference call

associate application sccp     //associates dsp farm with sccp application
no shut

On CUCM, this is the configuration made under the Conference bridge:

In order to user this hardware bridge, you have to do a media resource group and a media resource list:

The we apply this media resource group list to a device pool or to a specific phone.

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