one-way audio during conference with h323 inter-cluster trunk call

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Aug 11th, 2007
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I have cluster pub and 2 sub with CCM(4.2.3) SR2b, i can make offnet call through h323 intercluster trunk connected to GSM GW but when i make conference with it and i can hear him but he couldn't hear me.

notice CFE software of all the CCM is registered.


Regards

Haitham,

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Rob Huffman Sat, 08/11/2007 - 09:47
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Hi Haitham,


This really sounds like a Codec issue. Have a look;


Cisco CallManager Software Conference Bridge supports only G.711 a-law and G.711 u-law and does not understand any other codec such as G.729. External callers cannot be added to the conference if they use a codec other than G.711. In order for calls that originate as G.729 to be connected with phones that use G.711, you need to use a transcoder.


From this Conferencing doc;


http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a008009476a.shtml


Hope this helps!

Rob

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