We have 2 CUCM cluster connecting over ICT trunk (non-gatekeeper). One cluster on version 6 (1 pub, 1 sub) and another is version 9 (1pub, 2 subs).
There are 2 issues recently arised:
Issue 1 - DN 8989 on V6 Cluster called DN 2308 on V9 Cluster experiencing fast busytone.
Issue 2 - DN 2308 on V9 Cluster called DN 8989 on V6 Cluster experiencing ringback tone is heard even after the call is answered, no RTP established. This is intermittent issue, probably 1 out every 6 calls.
i have attached ccm traces from both cluster.
15:17 - 15:19 >> x2308 (v9) called x8989 (v6)
I see a call from 2308 to 8989 disconnected with the cause code (41), to RouteListControl because all devices are busy/stopped. RouteListName : RL-Brisbane-PSTN, Reason=41, RouteGroups(RG-Brisbane).
It will most probably work if you assign the trunk directly to the Route Pattern instead of Route List
it is something a weird issue in CUCM 8.X and 9.X versions.
Check this thread please: https://supportforums.cisco.com/thread/2213542
Thx for your inform.
We can see h225 is exchanged but none h245 TCS,OLC,Master_Slave determination and as such call failed.
We end up open a TAC but no progress as yet.
I am also awaiting cisco to confirmed whether bug ID CSCtq10477 is apply to our case or not.