I'm using CallManager 4.3(2)sr1c and a 2821 VGW with IOS 12.4(15)T9. The Music on Hold audio source is the server. No MRGs or MRGLs are configured. We mention the specific music to be played on the line and on the phone. We have centralized CallManager with remote site that don't have a server onsite. At our remote sites we can hear music on hold when we call internal numbers, but people who call us from an external number only hear tone on hold. We want music on hold everywhere. We are running unicast music, and there are no ACLs on any ports between the server and the remote site. Ideas?