An IP PBX is a private branch exchange that switches calls over an internet protocol network rather than copper lines. It connects VoIP phones to each other and to the outside world, handling transfers, extensions, and routing in software.
An IP PBX can run on a server at your office or be hosted in the cloud. Either way it carries the VoIP feature set: voicemail-to-email, call recording, and analytics built in.
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.