Question:

Is there a way I can place a call to a PBX that has a common IP address but also manages multiple domains? For example, our PBX is on 192.168.1.2 and within our PBX we host multiple tenancies. For Example: companyA.com and companyB.com.

If I dial 204@192.168.1.2 the packets arrive but the PBX rejects them. If I dial 204@CompanyA.com, they are sent elsewhere due to the DNS resolution. I don’t want to have to set my HOSTS file to force this to work. Is there another way?

Answer:

Yes. Please try sending the INVITE to the destination number 204@CompanyA.com, but, also set the Override Destination by casting your channel to a SipChannel:

if (channelResource is SipChannel sc)
{
    sc.OverrideDestination = “192.168.1.2”;
}

channelResource.Dial(“204@CompanyA.com”);

This will leave the formatted SIP INVITE intact, but send the packet to the address specified.

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