SIP providersConnect Callina to your existing PBX or SIP trunk. Per-provider setup guides for the most common DACH/EU vendors.See overview for the common setup. Per-provider guides: 3CX Easybell Fonial Fritzbox NFON peoplefone phonestar Placetel Sipgate Starface Telnyx Twilio Zadarma Other / generic SIP If your provider isn't listed, the Custom trunk setup covers the standard SIP-trunk path.