SIP Trunking explained the easy way

Last modified: January 26, 2021

What is SIP Trunking

What is SIP Trunking and why is it so appealing?

First of all what is SIP?

SIP stands for Session Initiation Protocol. A SIP session is essentially a standard phone call between 2 participants, a multiple party conference call or even a video call.

What is a SIP Trunk?

The term SIP Trunk is in other words a “virtual” (SIP account) phone line as opposed to the traditional analog phone line physical wire. It uses your data circuit to join your phone system to the internet, this service is provided by a SIP Trunking provider also called VoIP provider.

VoIP stands for Voice Over Internet Protocol, which means any voice call transmitted over a data network, in more simple terms phone service over the internet. With this technology one is able to make voice calls using a wireless internet connection instead of a regular phone line through an app installed on the device or by using an IP-PBX installed on a server.

PBX stands for Private Branch Exchange. An IP-PBX works like an analog PBX only in this case it’s using the Internet Protocol connectivity. An IP-PBX switches calls between VoIP users on local lines while permitting all users to share a specified number of external phone lines. An IP-PBX can either be physical hardware device or in software.

The benefits of SIP Trunking

Now that we understand the meanings of these terms we can talk about the benefits of SIP trunking

To begin with, SIP trunking can be a way of delivering high quality and dependable digital voice services for businesses without spending on extra hardware. 

SIP trunking is all about budget and flexibility and is becoming more and more popular these days. 

The following are reasons why businesses are choosing SIP trunking as opposed to the old fashioned and traditional telephone network:

Cost efficiency – SIP trunks are far more economical and affordable than traditional circuits. Businesses are saving 50% or more on their monthly telephone bill.

Eliminates hardware – With SIP trunking there’s no need for traditional line cords therefore lowering costs and eliminating hardware failures in the future.

Geographic resilience – PRI and analog telephone lines are hooked up to a single main office location, if an accident such as a fire or a natural disaster such as an earthquake happened it could eliminate your communications. SIP trunks are normally designed so the service is unnecessary at two different locations to avoid disastrous failures.

Recovery options – If your PBX fails, you have a power outage or your connection to the main office goes down, you can easily redirect calls to any telephone number in the world.

Geographic location freedom – The traditional system is attached to a physical location where as SIP trunking allows call routing to any IP address worldwide along with home offices and soft phones.

Consolidation of vendors – Many SIP providers offer Services such as PBX, UC and contact center offerings which gives a single source for all your communication needs allowing businesses to reduce the number of vendors they’re required to deal with.

What is the difference between SIP trunking and VoIP?

The terms SIP vs VoIP cannot be directly compared because they are two different concepts regarding a similar topic.

SIP and VoIP are both protocols, the difference is that the term VoIP means Voice Over Internet Protocol and it is basically a “telephone system over the internet” whereas SIP means Session Initiation Protocol and it supports de transfer of voice and video data packages, it’s used to deliver phone services to a business IP-PBX while the word Trunking refers to a technology that provides access to a telecommunications network.

More Information about SIP trunking

So now that you’ve read all these advantages to SIP trunking you may be curious in choosing a SIP trunk provider. 

At Switch2VoIP provides call center VoIP and contact center solutions such as hosted  predictive dialers and unlimited channels SIP trunking with no monthly fees. 

Our pay-as-you-go fashion gives you top quality with no volume obligations, complicated agreements or limiting credit departments. 

Benefit from our immense volume and buying power with low wholesale rates.

Sign up with Switch2VoIP for as low as $5 USD and benefit from the advantages of SIP trunking today!

Our free support is online and ready to help from 9am to 5pm EST, contact us via chat support on

Also Read:

What is the cost of SIP Trunking?

How to setup your SIP trunk on Vicidial and Goautodial carrier settings

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