FYI, I have very little experiencing with voice so please bear with me.
I have 2 PBX's in different cities. I would like to connect them over our MPLS circuit using Cisco 2851 routers.
I have a nortel PBX on one end and a siemens PBX on the other.
How do I configure the routers to create a 'tunnel' to each other?
The call routing will be done at the PBX. So if a user at Location A, dials 7, the PBX knows it goes to the 2851. I want the 2851 at Location A to forward those packets to Location B.
Likewise at Location B, if a user dial 8, the PBX forwards it to the 2851, where it will forward it on to Location A.
This is mainly going to be a 'dumb tunnel'. There won't be any call routing involved at the 2851's, just forwarding of calls.
My boss calls this Voice Over WAN. Though I'm not to entirely sure that's what it's supposed to be called.
Thanks for any and all help!
Here is a link from networkworld.com, perhaps better explaining what I'm trying to accomplish. I just have no idea what commands to do on the router.
PBX-to-PBX calls, as shown in Figure 3-5, originate at a PBX at one site and terminate at a PBX at another site while using the network as the transport between the two locations. Many business environments connect sites with private tie trunks. When migrating to a converged voice and data network, this same tie-trunk connection can be emulated across an IP network. Modern PBX connections to a network are typically digital T1 or E1 with channel associated signaling (CAS) or Primary Rate Interface (PRI) signaling, although PBX connections can also be analog.
Note - PBX-to-PBX calls are another form of toll-bypass.
An example of a PBX-to-PBX call is one staff member calling another staff member at a remote office. The call is sent from the local PBX, through a voice-enabled router, across the IP network, through the remote voice-enabled router, and terminated on the remote office PBX.