I have the following configuration: the 4-wire voice lines are installed in one location. The lines are connected to the Voice E&M interfaces on a 3700 Cisco router. In the other location (2000 miles away, connected by the WAN - T1 line) I have a Hoot and Holler system equipped with an E1 G.703 interface. Is it possible to establish the voice connection between those 2 locations? What hardware I would need to connect the H&H system. Currently I have in both locations just E&M interfaces and I am connecting current H&H system using analog line (4wire) interfaces.
I will really appreciate any help (hints how to solve my problem).