It’s particularly useful for call setup, management, and teardown. As virtual phone lines, it’s used by small to medium businesses to maximize enterprise PBX systems with less spending on hardware and setup. SIP trunking is used to leverage existing internet connections-enabling chat, video, and voice calls. Small businesses with on-premise phone systems upgrade to SIP trunking to replace expensive dial tone systems with cloud features without sacrificing earlier investments. Businesses are increasingly using SIP because of its flexibility and reliability. SIP is used worldwide to communicate using computers and mobile devices over the internet. PRI can be costly to maintain since the hardware is quickly becoming outdated. Essentially, it’s a bundle of analog phone lines put together. What is PRI? PRI has been used for decades to deliver lines of voice and data using physical copper lines. SIP is the technology that creates, modifies, and terminates sessions between two or more parties in an IP network, be it a two-way or multi-party call. Our earlier SIP trunk definition highlights that the main objective of SIP trunking is to replace older digital voice services like primary rate interface (PRI) technology. ![]()
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