Please click the link below for a guide on how to configure a 3CX PBX using Gradwell SIP Trunks...
https://www.3cx.com/docs/gradwell-uk-sip-trunk/
Please click the link below for a guide on how to configure a 3CX PBX using Gradwell SIP Trunks...
https://www.3cx.com/docs/gradwell-uk-sip-trunk/