I have a following scenario, i need some examples or cisco guides for the solution.
Head office and 2 other branch offices has a Cisco 3845 Routers and each one has has E1 Ports.
Each E1 port of the routers is connected to E1 Interface of the Third party PBX at head and branch offices.
The idea is to router the calls between 3 PBXs over the IP Network using cisco routers.
Can some one guide me with examples or guides on the cisco site.
3rd party PBX 1
3845 Router 1-----(IP Network)
3rd party PBX 2
3845 Router 2-----(IP Network)
3845 Router 3-----(IP Network)
3rd party PBX 3