SIP trunking replaces physical phone lines with a virtual connection that carries voice over the internet to your phone system. SIP (Session Initiation Protocol) is the standard that sets up and tears down each call.
Businesses use SIP trunks to connect an existing PBX to the outside world without copper lines, paying for capacity instead of fixed circuits.
Frontdesk gives you a business number answered by an AI receptionist that picks up every call, qualifies the caller, books the appointment, and logs the whole conversation to your CRM.