How Does SIP VoIP Work?

Session Initiation Protocol (SIP) is one of the trends that currently defines the evolution of Voice Over Internet Protocol (VoIP). Ever wondered how you can make free VoIP calls with Android Over-The-Top (OTT) apps like Whatsapp? SIP VoIP enables all this and more. But exactly what is SIP and how does it work? Have a closer look to find out.

What is SIP VoIP?

Internet Telephony Service Providers (ITSP) offer a range of VoIP services classified as SIP. SIP is essentially a VoIP protocol that enables users to make free video and voice calls. SIP is the Internet Engineering Task Force (IETF) formality for VoIP and other multimedia and text sessions such as online games, instant messaging, and videos. SIP is a text-based protocol utilizing UTF-8 encoding. UTF means that encoding is in Unicode Transformation Format here, and the '8' simply means that the code utilizes 8-bit blocks to reveal each character.

SIP is flexible and can offer users features such as call hold, call transfer, and conference calls. It's also adaptable, as you could add additional features. Besides being globally free, there are also no restrictive laws pertaining to it, plus you can also get SIP addresses and SIP apps for free. Businesses also access SIP via their Private Branch Exchange (PBX) system.

How Does It Work?

In order for you to use this service, you will need a SIP account or address, your Internet connection, your SIP client, and your audio and video devices.


Choosing the right technology is crucial to a growing business. Take the uncertainty out of the equation by choosing a SIP technology provider that can scale to meet your business' needs whatever they may be at any given time. Call 1-866-879-8647 or fill out an online form to request a no-obligation quote from an 8x8 product specialist.

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