How a PBX phone system works
VoIP MS
JUNE 18, 2025
SIP (Session Initiation Protocol) : A signaling protocol used to start, manage, and end VoIP calls. PBX systems also handle advanced functions like voicemail , auto-attendants, calling queue, and conferencing, making them essential for professional communication. RELATED : On-Premise PBX or Cloud PBX?
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