The Gigaset pro Interoperability Program is designed to test Gigaset pro PBXs connected to SIP Trunks provided by ITSP (Service Provider) Platforms.

If you are missing local Service Providers you can contact the local Technical Sales Representative for the UK & Ireland here.

Basic Interoperability When connecting a Gigaset PBX to the Service Providers listed here you will benefit from Calling Features such as: Incoming Calls Outgoing Calls Call Transfer CLIP / COLP Call Waiting Call Forwarding Anonymous Call DTMF A-Number forwarding (Optional)     Provider T300/500 Gamma Telecom T300/500 Spitfire T300/500 VoIP Unlimited Voipfone   T440/640 Simplecall Business