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New Member

Conference between ip phone on lan and wan

Hi,

Can we have a conference call between two ip phones connected on lan using G711 codec and two ip phones on Wan using G729 codec. I have doubt that who will do the codec conversion can the MCS box do it or do we need to install a router or some device to do this?

Also I need one more clarification, what if the phones on lan are behind a ATA Box, and still I want to do a conference call, can MCS box handle this too.

Thanks and Regards

Salim

3 REPLIES
New Member

Re: Conference between ip phone on lan and wan

The CallManager server itself will not perform the transcoding. You will need DSP resources, either a port on a 6608 blade or a DSP farm in an IOS device, to provide transcoding between g711 and g729 devices.

New Member

Re: Conference between ip phone on lan and wan

Hi robrhodes,

To work around this problem can we use G729 codec on lan, if all the codec's are same then there will not be any transcoding.

New Member

Re: Conference between ip phone on lan and wan

Unfortunately, g711 is the only codec supported by the native callmanager conference software....what other hardware do you have in your environment that could be used for transcoding? If you don't have the DSP resources, you may have to use g711 across the WAN.

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