I am bit new to IP telephony world; we have one HKG remote location where the site has ccm 6.0. When we call from US location to HKG site the phone rings and call get disconnected as soon as it is picked up. As per basics it looks codec mismatch issue.
When we place from US location the traffic payload is on G.729 which is somehow not negotiated by HKG end phone device (7975G). I checked the HKG call manager regions which are attached. Please shed some light where the issue----.it is in regions or it is lack /mis configuration of Transcoding in call manager.