On the CommPortal settings page there's a checkbox for "If your phone is busy forward to another phone". I check that, fill in the "another phone" number, and click Apply. Should this work? It doesn't seem to - if the Sonic ATA is busy and another call comes in, then I hear a call waiting beep on the ATA line but the incoming call never transfers. It just rings forever. I've let it ring as long as two minutes and nothing ever happens.
Is this broken, or am I doing something wrong?
On the same topic, is there a way to disable call waiting? It appears that Fusion fiber customers can do this, but it doesn't seem to be possible with the crappy FTTN VoIP service.