04-01-2012 09:09 PM - edited 03-16-2019 10:24 AM
I have issue with desk phoen pickup when having mobile connect setup. The environment is using UCM 8.5SU2. The remote destination phone is ok and the mobility transfer to remote phone is also working fine. The symptoms and steps are:
1. User A call IP phone B
2. Phone B and remote phone rang together - this is FINE
3. When we answered the cal from remote phone, it was connected well.
4. remote phone hang up then user A heard engaged tone straight. However IP Phone B will provide the resume button after 37 seconds and was able to pick up the call as long as user A has not hang up.
I looked at the Cisco Voice GW config, all seems good except there is a CLI "isdn alert-end-to-end". I never used this command and suspect might be the cause. Has anyone experience the same problem? Thanks
05-29-2012 07:13 PM
I am experiencing the same problem, but with a different setup.
1. Running CUCM7.1.5 instead of UCM8.5
2. Voice gateway is a 2611XM running IOS Version 12.4(25d).
Have you found any workaround?
06-04-2012 04:09 PM
not yet. I am going to raise TAC case on this issue.
06-11-2012 04:24 PM
Hi Steve,
My problem is fixed now. It is telco issue which sent the disconnect signal after 35 seconds. You can turn on ISDN q931 debug on the IOS GW and check for this. Hopefully this will fix yours too.
06-13-2012 07:55 PM
Hi Robin,
What was it that fixed the problem? Configuration change on your side or the telco's?
06-13-2012 09:55 PM
Hi Steve,
Once you confirmed the disconnect signal is sent by telco after long period of time (35s in my case), then you need to contact the PSTN provider to fix this. There's nothing to do from customer's end since the root cause is at Telco side. You may send the ISDN Q931 debug output to telco engineer to prove that IOS GW is functioning properly.
07-17-2012 12:42 AM
FYI My problem was resolved by switching IOS versions. I blame IOS version 12.4(25d).
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