2025 Newest POE IP PBX System with SIP Phones Extensions for Small Business Office VoIP Telephone SolutionIAD for IPPBX: Integrated Access Device for Business Communication Solutions

IP PBX (Internet Protocol Private Branch Exchange) is an IP-based telephone switching system that transmits voice over IP networks instead of traditional analog telephone lines. It integrates voice calls, internal extension communication, outbound trunk calling, voicemail, call forwarding and multi-line management in one device, widely used for enterprise office phone deployment to cut communication costs and realize unified communications