10-20-2010 05:58 PM - edited 03-16-2019 01:27 AM
HI all,
I was wondering if anyone has had any success with doing ICTs between these two call manager versions?
I have a customer that is looking to make the big transition and they are looking to have a test group on the new version.
I was looking to use call forward unregistered on the legacy system over an ICT.
Regards
Adam
10-20-2010 06:14 PM
You shouldn't have any problem doing that, the ICT protocol uses H323 and it's backward compatible so you don't need anything special for this.
HTH
java
If this helps, please rate
www.cisco.com/go/pdihelpdesk
10-21-2010 01:03 AM
Hi,
I did exactly this for a customer last year. I used non-gatekeeper controlled trunks and it worked without any problems.
CCM3.3 does not support Call Forward Unregistered though so you willhave to rethink that part (Forward All, Forward Busy and Forward No Answer are supported)
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/3_3_4/ccmcfg/b06phone.html#wp1121134
What I did was:
The migration went smoothly - it was interesting to be reminded how simple CCM3.3 was compared to recent versions of CUCM.
10-21-2010 04:25 PM
Here is a useful document on the DP / CM Group / Remote Servers associated with the ICT on both clusters :
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/7x/trunks.html#wp1044701
- Sriram
10-21-2010 04:26 PM
Another thing that I always suggest to customers is to ensure that the 'incoming CSS' of the ICT on each cluster doesn't have access to the partition of the Route Pattern to the ICT. This way, there is no chance of a call loop across the ICT between the clusters, preventing code yellow situations on the CCM servers.
- Sriram
10-21-2010 04:42 PM
Great ideas.
Thanks for that. Will have to investigate further
Adam
10-21-2010 04:43 PM
That is good news. I remember having an issue with an ICT between 3.3 and an early version of 5.
Lets hope that was a bug just in that code.
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