PG JTAPI and CM failure, how to connect with others?

Hi All;
The main site has UCCE side A (RGR-a,PG-a, HDS&ICM&Webview-a), CVP servers and VXML Servers, Gatekeeper, two Voice Gateways and Cluster of CUCM (publisher and 3 subscribers).
Disaster Recovery site has UCCE side B (RGR-a, PG-a, HDS&ICM&Webview-a), CVP Servers and VXML Servers, Gatekeeper, two Voice Gateways and 3 CUCM all subscribers while the publisher in the main site, so the CUCM are clustered with main site.
If the CUCM in the main site had a failure (the publisher and the 3 subscribers), what are the needed configuration need to be done in the main site at the UCCE side A to let it able to communicate with the CUCM subscribers in the Disaster Recovery? Is this failover possible to be autmatic or I have to do it manual?
Your kindly advise is highly appreciated.
Regards
Bilal

Hi Bilal,
one PG can connect to only one CUCM CTI Manager. The redundancy is within the PG A and PG B.
So, if the CTI Manager that the PG A connects fails, PG B JGW process will be become active and will communicate with CTI Manager that PG B connects.
Now, that the connectivity of PG to CTI Manager. But the CTI RP's may register to different Subscriber depending on how the callmanager group is defined on device pool that is assigned to CTI RP.
You should have the Callmanager group for the CTI RP such that it contains both main site and fail over site call managers.
Here are some scenarios.
lets say, you have
sub1 and sub2 on main site
sub3 and sub4 on recovery site
PGA connect to sub1 CTI manager, and PGB connects to sub3 CTI manager. Callmanager group (sub1, sub2, sub3 and sub4 in order) for the CTI RP contains all the call managers
Failure Scenario:
1. If sub2 fails - JGW process on PG B will be active. But CTI RPs will be registered to sub2
2. if sub1 fails, JGW process will reamin active on PG A. but RPs will be registered to sub2
3. if both sub1 and sub2 fails, JGW process will be active on PG B and RPs will be registered on sub3
Hope this helps.
Thanks
- abu

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PG JTAPI and CM failure, how to connect with others?

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