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SIP Trunking: Overview

What is SIP trunking?

The first question in any technology buying journey. Do you understand the product, how it works and what it can offer your business? With your current understanding of PSTN, ISDN and PBX services, getting to grips with SIP trunking shouldn’t be too difficult.

SIP essentially works by setting up sessions to transmit messages over the internet. These messages take the form of voice calls, video and even instant messaging. The most common scenario for SIP trunking is transmitting your voice calls from your PBX to the outside world.

As SIP transmits data over the internet, it must be encoded for security. SIP is a mature, secure service that is ready to takeover the transit of your current telephony needs.

Whilst you can run SIP over the public internet, it is more common – and advisable – to dedicate a portion of your network to SIP traffic. This helps ensure both the quality and security of voice traffic, as SIP performance is dependent on the underlying connectivity.

The three most compelling benefits of SIP trunking are the immediate and significant cost savings, the undeniable call quality and future proof service you will be consuming – ready for the upcoming ISDN switch off.