[cisco-voip] CUCME. SIP. No ringing (180) during outgoing calls.

[Aleksey Querty]

Hello, dear colleagues.

I have a problem with outgoing SIP calls to ITSP. ITSP doesn't send to my
CUCME ringing (180) packet at all, so, during the outgoing calls to ITSP
from CUCME internal extension I've heard only silence before I received OK
(200) from ITSP and started to listen to the remote party RTP.

So, signaling seems like: CUCME > INVITE > ITSP; then CUCME < Trying (100) <
ITSP; then silent without ringback and then CUCME < OK (200) < ITSP.

Is it possible to configure CUCME to play "ringing" tones before/without
receiving ringing (180) from ITSP during outgoing calls?

Thank you for your reply in advance.
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