I have a Technicolor TG799-vac VDSL Max Gateway on my NBN FTTN connection. I note it has VoIP capability for several services. One of these is registered for my Telstra home phone, the others are unused.

I also have an Engin VoIP service presently using the Engin supplied Linksys VoIP router plugged into one of the ethernet ports on the Technicolor Gateway.

Would it be possible to program one of the unused SIP services on the Technicolor to handle the Engin service? Engin obviously use a different server to Telstra, does this present a hurdle? If it can be done how do I access the Technicolor Gateway to enter the Engin settings?

Any help gratefully accepted. Thanks.