01-19-2010 12:03 PM - edited 03-15-2019 09:07 PM
Hello,
I have a problem with setting up a conference bridge with transcoding. The setup is following:
IP Phone -> SCCP -> CUCM -> SIP -> VGW ->SIP -> PSTN
IP phones are in one region - R_PHONES
VGW is in region - R_VGW
HW transcoder on VGW is in region - R_XCODE
SW CFB on CallManager is in region - R_CFB
R_PHONES R_VGW R_XCODE R_CFB
R_PHONES G711 G729 G729 G729
R_VGW G729 G711 G711 G711
R_XCODE G729 G711 G711 G711
R_CFB G729 G711 G711 G711
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.
Does anyone have an idea how to solve this?
01-19-2010 08:02 PM
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?
voice class codec 1
codec preference 1 g711ulaw
codec preferece 2 g729r8
codec preference 3 g729b38
dial-peer voice X voip
voice-class codec 1
MK
01-20-2010 12:26 AM
Hi,
As I wrote before: I have all resources (SW ANN, CFB, MOH, MTP and HW XCODER) assigned to one MRGL and all devices are using this MRGL, so it should be no problem here.
I have voice class codec:
voice class codec 1
codec preference 1 g711alaw
codec preference 2 g711ulaw
codec preference 3 g729r8
codec preference 4 g729br8
and it is assigned to dial-peers. But I think this is not relevant here as I am making local conference.
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