Which phone systems are supported out of the box?
Shipped adapters cover RingCentral, Dialpad, Zoom Phone, Microsoft Teams Phone (including Direct Routing to an SBC), 8x8 Work, Nextiva, Vonage Business Communications, GoTo Connect, Avaya Cloud Office, Aircall, and Strkr Messaging as the native path. Teams on self-hosted PBX (Asterisk, FreeSWITCH, Cisco UCM) connect through the open CTI contract documented with OpenAPI 3.1 spec plus Node, Go, and Python SDKs. A new vendor adapter typically ships in two to six weeks.