I have a problem with doing a transfer from a CUC version 7.1 mailbox to a phone on the CUCM. Here's how it is set up:
1) User Device Profile with line 2461640 has a Call Forward All to Voice Mail
2) CUC mailbox 2461640 has a standard transfer set up to 8881611 (and the All Hours schedule), with the "Wait While I Transfer Your Call" prompt enabled
When I call 2461640 I am immediately transferred to the Standard Greeting, I do not hear the "Wait While I Transfer Your Call" prompt.
I managed to get something similar working the following way:
1) Hunt Pilot with line 2461640 pointing to the Unity VM ports, replaces the User Device Profile with line 2461640
2) On Unity a Direct Routing Rule is set up to transfer direct calls to CUC mailbox 2461640 with the "Attempt Transfer" option selected
Then it works fine, the call is transferred.
Does someone have an explanation for this behaviour?