Hopefully this will answer your question, but this is something that Allworx can do for you.

Network up to 99 Allworx PBXs for site-to-site direct dialing without the need for a central Proxy/Registrar. Each PBX acts as a standalone phone system for its local users and provides the capability to dial to another PBX over the Internet using the integrated dialing plan. Site-to-site calls are free because they are passed from one PBX to the other over the Internet.

Interface with up to 100 third party gateways or proxies for the purposes of routing calls to non-Allworx PBXs. SIP-capable PBXs as well as legacy PBXs fronted by a SIP gateway can call (also be called by) by an Allworx user across the Internet without toll charges. The dialplan for each SIP endpoint directs where the calls should be routed over the Internet.

Allworx also provides a capability to bypass Internet access outages by routing calls over traditional PSTN services if available. If you have any further questions, give us a call and we can doa conference call with you to answer your questions more in depth. [Linked Image from sundance-communications.com]

Joshua

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