5000 inbound sip caller gets no ringing if cf always to external number

[odiefoxydog]

Hi,
I've a site that has just switched from ISDN to Gamma SIP trunks with a DDI that follows a STAR. Out of hours it goes to a CRA that transfers to an extension that is on a call fwd always to a mobile number.

The call completes OK when the mobile answers, however the inbound caller gets no ring tone at all.

Any ideas? As a temporary work around it's on a call fwd no answer so the caller gets a few rings before the silence until the mobile answers.

Thanks

 

[NTEDave]

Could it be the Audio on Transfer settings on the new SIP trunk group?

Set to be MOH but you don't have a MOH source plugged in??

Just a guess