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Benefits of SIP trunking for Businesses


SIP stands for session initiation protocol. It is a kind of a service which allows businesses who have installed PBX system to have a real-time communication including VoIP. When SIP trunk is connected with the conventional public switched telephone network system (PSTN), a company is able to communicate over internet protocol all over the world. It also provides an opportunity for the company to replace its fixed PSTN with IP telephony system which is connected with this SIP trunk system externally. This enables a single platform for all multimedia components like data, video and voice.

The trunk is usually made up of three primary components. These components include IP PBX which is there to communicate with all the endpoints over the IP network. It also facilitates users of the VoIP service on local lines as well as they allow callers to share several external telephone lines. It also enables users to switch calls between traditional phone users and VoIP users.

The other component of SIP trunk is ITSP which also stands for internet telephony service provider. The role this component plays is to enable connection to PSTN for the IP network usually for fixed and mobile communications device. IP communications can also be enabled through IP network or public internet services.


The last element is the border one which is there to enable connectivity between the PSTN, external IP carrier and enterprise IP network. This element is also used as to transfer calls into and out of PSTN. It can also work as a SIP-enabled firewall or even an enabling edge device that is connected to a firewall. The service provider is usually responsible for enabling this element for you.

The SIP trunking works by amalgamating voice and data connections into a single platform. It acts as an efficient converter between the company’s internet connection and the legacy telephony system. It enables data networks to carry the voice traffic in an efficient manner. The features included in this are normally E911, local and long distance calling, Caller ID, and listing of directory. All of these services are embedded into the existing conventional telephony system of the corporation.

There are numerous benefits of using this trunking system. There are no additional costs as most of the calls are made to travel through the existing IP network. The service provider usually charges a fraction of amount which would otherwise costed you if you weren’t had IP connection. As a result, this system provides a reliable service along with cost-effectiveness which is crucial for any business entity to thrive in the market.

Also, other costs are eliminated like there is no need to invest on expensive desktop equipment. Monthly expenses are also greatly reduced as a single connection is enough for voice and data both. It also allows businesses to outsource the PSTN connection to third parties hence reducing the expenses of long-distance calls. With the emergence of SIP trunking, businesses are utilizing its benefits to the fullest in order to become more competitive and cost efficient.