3CX and Vonage make it nine backends

connect_3cx connects a 3CX V20 system to Odoo through a server-side CRM template plus a Call Control agent: contacts are looked up and created from the PBX, and the resulting calls journal into the shared ledger. The dialplan stays in 3CX, which is the point — nobody wants to rebuild a working phone system to get CRM context.

connect_vonage takes the opposite route, driving telephony from Odoo with NCCO: browser calling through the Vonage Client SDK, IVR, call recordings and voicemail, and SMS through the Messages API. With these two, the platform reaches nine provider integrations over one core.