[asterisk-users] how to make a video phone call

[Song Zhi Feng]

hi, i am trying to make video phone call between Grandstream endpoints which support video feature, but failed to get video on the call. The calling party has attached "m=video" SDP field in INVITE message, but did not get "m=video" SDP from the peer "200 OK" response message. Could you tell me how to configure the Asterisk to get video call? Thanks.  
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