I have a CUCM v8 and a 2951 VR. When the customer is making calls to a couple of numbers they are failing with a busy tone. However calls to other numbers that are nearly identical and match the same route patterns complete. It appears to be happening on just a couple of numbers. Please see the attached for working and non working examples.
I believe this is an issue with the SIP provider as the logs show that the call is trying to connect but gets a SIP 603 Declined error:
603 DeclineThe destination does not wish to participate in the call, or cannot do so, and additionally the destination knows there are no alternative destinations (such as a voicemail server) willing to accept the call.
Can anyone confirm that this is the case? Or suggest what else it could be?
From the logs I could see there is a authentication need, follwoing by several 100 trying messages and finally a decline message., Is this a normal Voip call or any other, you may need to research on this part.
9195981: .Jun 30 18:47:13.723: //351726/806E67290776/SIP/Msg/ccsipDisplayMsg:
SIP/2.0 407 Proxy Authentication Required
Via: SIP/2.0/UDP 10.10.10.30:5060;branch=z9hG4bK2D0F5267B;rport=56792;received=220.127.116.11
CSeq: 101 INVITE
Proxy-Authenticate: Digest realm="sip.onecentral.net", nonce="57754cf8000000e2d4e21d2d545c8a94123119bc2403c3f1", qop="auth"
Server: OpenSIPS (1.5.3-notls (x86_64/linux))
Yes this is just a regular local call for the user. It is an office location that they can reach by mobile phone so the far end is receiving calls with no issue.