What is IP PBX | its Features and Benefits?

An IP PBX, or private branch exchange, is a system or communication equipment that gives desk phones in a fixed location, such as an office or building, voice access. Session Start Protocol is used later on in IP-based telephony services (SIP). The SIP universal protocol is now considered standard for VoIP phone systems. The PBX system can use many voice channels by using SIP trunking.