on Asterisk 1.4.21 which is being used in a callthrough scenario –
callers call via PSTN to a DID coming in via SIP and then dialing outbound via DTMF and the outbound calls get routed via some SIP
termination provider – lately I see that every now and then MusicOnHold gets triggered like this on outbound calls:
Started music on hold, class ‘default’, on SIP/outbound-sip-provider-00000002
I do not have any reference to MusicOnHold in my extensions.conf so a misconfiguration is unlikely.
Is there some SIP magic that can trigger MusicOnHold on my end?