I’ve just diagnosed an issue a customer had getting a Voipfone SIP trunk Registered on a SnomONE PBX.
The trick to getting this to work is:
- Turn on long SIP headers. Go to the admin, general settings page and set “Use Short SIP Headers” to “long”
- If you are using IP access control then you need to enable the IP range 126.96.36.199 – 188.8.131.52 to ensure Voipfone will work