We have 2 data centers curently. The Data centers have a DS3 connection. Is it Possible to have our Primary Unity Server in NJ and the secondary in PA? We have CM subscribers at both sites, and exchange message stores as well. Has anyone done this, even if it may be unsupported>?
It will work, however it is not officially supported. Cisco Unity design states that you need 100 Mb link between all Unity servers.
There are two types of failover available with Cisco Unity. Both types require access to the same messaging systems and messaging infrastructure components. There is local failover, in which both the primary and secondary failover servers are co-located in the same physical site as the messaging system they service. There is also remote failover, where the primary and secondary failover servers are located in separate physical sites. In a remote failover configuration, the network connectivity should be no less than 100 Mbps between the sites, and the messaging systems and messaging infrastructure components must be accessible by both Cisco Unity servers. (Note that messaging infrastructure components include domain controllers and/or directory servers, global catalog servers, and name resolution hosts.) Regardless if your network connectivity bandwidth is at or greater than 100 Mbps, the response time between the Cisco Unity server and the Exchange servers it is connected to should be no more than a 40-millisecond round trip delay in order for Cisco Unity to service subscriber TUI requests normally."