I want to make a conference between 3 phones in region R_PHONES.
Phone A calls phone B. Phone B answers the phone. Phone A tries to connect the phone C into the conference so the user press conference button and dial phone C(phone B has a MOH). Phone C answers, they can hear each other, but after pressing the conference button again on phone A to connect all 3 phones together , the phone C have a "to conference" message on display but gets a fast busy tone. Phones A and B can talk to each other again.
According to everything I've read, the phones should use a transcoder, because the SW CFB can only do G711 conference. But they don't. I can see that no DSPs are in use on VGW. I have all resources (SW ANN, CFB, MOH, MTP and HW XCODER) assigned to one MRGL and all devices are using this MRGL.
I have to use G729 outside a R_PHONES because of network bandwith.
Make sure you assgin a Media Resource Group List (MGRL) to the phones and the gateway, or to the device pool to which your gateway or phones belong. Also make sure the MRGL contains the Confernece Bridges.
Do you have any voice class configured in the VGW?
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