SIP settings

 

 

Main sip server:   77.72.174.129    on port 5060 (standard)
Alternative sip server #1:   77.72.174.130    on port 6000
Alternative sip server #2:   77.72.174.131    on port 6000
Stun server #1:   77.72.174.160
Stun server #2:   77.72.174.162

 

 

If you have trouble registering your SIP device, you can also replace the @ with a * character.
I.e. if your username is user@best-call you can also use user*best-call in your SIP settings.
This might solve register problems for some SIP devices and SIP softphones.