Hi,

I'm using one of the many BetaMax voip services, but I was wondering if anyone knows if it is possible to dial directly to a sip device (using its IP or SIP address and not a Voip provider) from a Zoom 5800 ATA ? How would you put in the address? (As a quick dial preset, presumably?) What IP ports would it use?

The general process is described here:

Direct IP Dialling

The device I want to call is most likely going to be phone plugged into a Grandstream Handytone486, if that helps.

Thanks!