Two sites one call manager

[jmbabcock]

Hello, I am looking at deploying a cisco ISR router at another site, connected to a T1 line with a toll free number associated. Is it possible to use an existing PUB/SUB/IMP/UNITY environment to manage and route calls for this? Diagram below is what I am looking to implement. thanks

[Jaime Valencia]

As long as you have connectivity between the two sites, sure, that's possible.

[Maren Mahoney]

In addition to what @Jaime Valencia  and @Nithin Eluvathingal have said, note that the T1 should be a data T1 and not a voice PRI or channelized.

Maren

[Nithin Eluvathingal]

As pointed out by @Jaime Valencia, if Site B has access to the UC applications in Site A, this setup is feasible.

Its also recommended to use SRST In the event that the connection to Site A is lost, the ISR router can switch to SRST mode. This allows local phones in Site B to register with the router and make outgoing calls via the PRI, as well as receive incoming calls. During SRST, calls to Site A can be routed through the PSTN connection.

[jmbabcock]

Great, thanks for the feedback, appreciate it. 

[jmbabcock]

Circling back around on this question. I have configured the Site B router in my diagram above in a separate partition, media group, route group, line group, etc and the router is showing it's SIP trunk is connected. However, when attempting to test by using a jabber client which is configured in the test line group and making a call out to a cell phone, the number showing ip is the toll free number from Site A as it is using the primary router from Site A. As well, when trying to call from a cell phone to the Site B router T1 local terminating number it shows call failed. I must be missing something in the config somewhere and looking for any helpful suggestions. 

Thanks