This is a recurring complaint, and it it probably due the fact that your PBX is behind a firewall without the RTP port range forwarded. You might be able to band-aid by enabling progressinband, or enable force answer on the inbound route.
This is a recurring complaint, and it it probably due the fact that your PBX is behind a firewall without the RTP port range forwarded. You might be able to band-aid by enabling progressinband, or enable force answer on the inbound route.