Using static routes for SIP trunk providers on different Internet Connections

Discussion in '3CX Phone System - General' started by, May 30, 2017.

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    Oct 12, 2011
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    Currently I have the following setup:

    3CX Server v15 running on Windows 7 Pro with a private IP of
    I use Voipbuster as my SIP call termination provider and I have the following route:

    Static route to via router
    The router has the appropriate NAT and firewall rules set for SIP and RTP to flow without the need for STUN. The router also has a public IP that is static.

    For fault tolerance i wish to employ a 2nd SIP provider but on a secondary Internet connection that's on a 2nd router within the same private subnet. For example if I use Sipgate as the provider I would do the following:

    Static route to ( and ( via router

    Will this work or will 3CX somehow try to announce the wrong public IP under certain conditions and break the communication?

    Many thanks,

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