Conferencing between ICT

Unanswered Question
Sep 20th, 2007


We are having two Call manager clusters. Suppose Phone 1 and Phone 2 are connected to Cluster 1 and Phone 3 and Phone 4 are connected Cluster 2.

When Phone 1 calls Phone 3 in Cluster2, and try to take Phone 2 in conference, Phone 3 in Cluster2 will automatically get disconnected. So we are not able to make conference calls.

But when Phone 3 calls Phone 1 in Cluster1 and take Phone2 also in Conference, it is working. ie it is working when Phone 3 initiates the conference. So it's like one way the conference happens.

Within both the cluster, Phones are able to participate in multi-party conference without any problem.

Can anyone tell why this happens?



I have this problem too.
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gogasca Thu, 09/20/2007 - 22:20

Hi Pete,

Normally check the region configured between CFB and ICT.

Make a call between cluster and press twice the i button, you will see which codec they r using.

Then check which type of CFB you are using.

If you are selecting a SW CFB it only supports G711. Hence you will need a Transcoder.

Or change ICT communication to G711 which will affect BW usage across the WAN if theres a WAN involved.

Let us know


rob.huffman Fri, 09/21/2007 - 05:06

Hi Gonz,

Nice thinking on this one! 5 points your great explanation as well :)

Take care,



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