We have call manager cluster: One publisher, One subscriber. Also one UCCX server, one voice mail server and ISI server. They all locate at the same place. Right now we are considering a disaster recovery plan for phone system. We have multiple remote sites which have IP phones registered with the main site. Also several contact centers use the UCCX server too.
I was thinking utilize the CME in SRST mode in every gateway at the remote site. But by that way, I need configure every gateway. It seems not good idea. Right now I'm planning to buy another callmanager and UCCX server, Voicemail server at our DR site to do the failover over the WAN. My question is
1. Can I use one callmanager for both publisher and subscriber purpose? I see the normal callmanager cluster is one publisher plus several subscribers. But if the main site publisher
went down, I need another publisher at the DR site. So I need 2 publisher and 2 subscribers in my cluster. If I can use one callmanager for both function at the DR site, then I could save a lot. Any performance degradation?
2. For UCCX server, I'm not sure how UCCX server failover through the WAN. How to design it? Any suggestion?
3. I'm not sure Voicemail and ISI server can do the failover or not. Any idea?
Appreciated for any help.