We are considering using an existing call manager 4.2(3)publisher and subscriber in one or our offices as a central site for a remote office. The office currently has a 2621 router that would need to be built out as the gateway router. We are planning on recommending a 2821 SRST gatway router for the remote site. Can a 2621 router be used as the central site gateway router? I am thinking the central site router DSP provisioning will need to be looked at. Is there any other reason we would not be able to use the existing 2621XM router at the central location?
Any input would be very much appreciated.