Hi,
I have setup new ITSP with this configuration : CUCM -- CUBE -- ITSP (via internet)
Credentials provided by ITSP is correct because when I tried on phonerlite, it's registered and I can make incoming and outgoing call. But when I test it on CUBE, I only able to do incoming call, when make outgoing call from ip phone, there is no ringback tone or busy tone.
From investigation, SIP traces is like this:
1. CUBE sent 101 INVITE
2. ITSP response with 401 unauthorized
3. CUBE sent 102 INVITE contains Authorization
4. CUBE sent 102 INVITE contains Authorization
5. CUBE keeps resent 102 INVITE until I put phone on-hook
ITSP said they never got 102 INVITE messages from CUBE. Have someone experiencing issue like when they connect to ITSP via internet. Is it possible that the internet provider discard the second INVITE? Since calls using phonerlite is working, I find it hard to push internet provider to check on their side.
For further information, I attach SIP traces for the call.
Thank you.
