These are my experiences with setting up Gigaset with 2talk.
The Gigaset A580 IP processor is way too slow to cope with several VOIP providers.
In addition fo "Fixed line" and Gigaset I had configured.
- Asterisk
- Skype SIP
- 2Talk
The A580 gives misleading messages "Registration failed"
Asterisk will register withing a few seconds, Skype will register withing a minute.
However with 2Talk it can take half an hour or more.
The configuration for 2Talk is:
Domain=2talk.co.nz
Proxy=2talk.co.nz
Registrar=2talk.co.nz
All other settings are default.
Sometimes 2talk regresses to "Registration failed".
Sometimes you get a Busy message regardless of which number you try to ring.
These issues do not happen with Skype.
I have not been able to track down what exactly is causing these issues between A580 and 2talk.
The only way to figure this out is to use a tool like Wireshark and trace all network traffic.