|Main sip server:||188.8.131.52 on port 5060 (standard)|
|Alternative sip server #1:||184.108.40.206 on port 6000|
|Alternative sip server #2:||220.127.116.11 on port 6000|
|Stun server #1:||18.104.22.168|
|Stun server #2:||22.214.171.124|
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.