My Senao SI 7800H WiFi phone works OK when I call PSTN numbers, but I don't
get incoming sound when I call other Sipgate users. It works OK when another
Sipgate user calls me. Works when I call 10000.
Sipgate just advised me to forward ports.
(which is all very well, but you can't on friends or public WiFi, but that's
for another time).
I forward ports 3478, 3479, 5004, 5060, 8000, 10000 to my phone. Tried all
possible combinations of settings and FWD Stun, but to no avail.
I have borrowed Zyxel P-2000W V2 phone, used the same settings, and it works
fine !

So my question is, what is the difference between calling PSTN and another
Sipgate user ?
(haven't tried other VoIP providers)
Is there a different port used to receive sound ?
Thanks, regards,
Martin