Flexible Voice Connectivity

SIP trunks connect your existing PBX to the phone network over your broadband or ethernet connection. They replace traditional ISDN lines with a more flexible, lower-cost alternative — with no compromise on call quality.

Benefits

Save up to 50% on line rental — SIP trunks cost significantly less than ISDN channels

Scale instantly — add or remove channels as your business needs change

Keep your numbers — port your existing geographic numbers to our SIP platform

Business continuity — failover routing if your primary line goes down

Works with your PBX — compatible with FreeSWITCH, Asterisk, 3CX, Avaya, and most IP PBX systems

Free internal calls — calls between SIP trunks on our network are free

ISDN Switch-Off

BT is switching off the ISDN network by 2027. If your business still uses ISDN, now is the time to move to SIP trunks. We handle the migration and number porting so there is no disruption to your service.