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VoIP SIP Trunk

Maybe you’ve heard of SIP Trunk or VoIP SIP Trunking. Maybe an acquaintance of yours saves money by using a

IT HERO SIP trunk in his or her business.


As a result, you’d like to know more. VoIP stands for Voice over Internet Protocol, or in more common terms telephone service over the Internet.

Because your business is already paying for the internet, you can now use our VoIP solution to make calls at a reduced cost.

A SIP trunk is the VoIP equivalent of the traditional analogue, basic or primary rate telephony service. It’s a multi-line service that you would use together with a IT Hero Hosted Switchboard or a VoIP PBX.

You can also connect it to a traditional switchboard with a gateway device.

You can choose from a minimum of 4 up to 1000 channels. A channel is the amount of concurrent lines you can have linked to a number or numbers to allow for concurrent calls both incoming and outgoing. This means that the trunk is ideal for both small and large companies, even call centres.

Direct Dial Numbers
You can choose between a SIP trunk with just one number or one with multiple numbers. Multiple numbers linked to a trunk are called direct dial numbers.

Some of our clients give each employee a phone number that rings directly to their desktop or mobile phone.

This allows callers to bypass the main business number.

Some of our clients have more than one business number linked to their SIP trunk. We can provision 1 number up to a maximum of 10000 numbers on the trunk.

Moreover, you can upgrade the number of channels or add additional numbers to your SIP Trunk, at any time, without interruption to your business.

Monthly From:

  • Contract Term: Month-to-Month

(incl. VAT)

for 4 channels per month

Why Choose a IT Hero SIP Trunk Solution

Save up to 50% on your business call charges.

  • Port your business number to IT Hero or choose a new geographic or non-geographic telephone number.

  • Link one number or multiple numbers for direct dial in, to your SIP Trunk

  • No lengthy contract – sign up month to month.

  • No costly setup charges.

  • Easily upgradable with no impact on your business.

  • Switch Telecom’s network is fully redundant and offers superior call quality.

  • Call forwarding and Voicemail available.

  • Divert calls quickly and easily in case of a connectivity or power failure.

  • Choice between SIP or IAX2 protocols

  • Free fax to email solution for multiple users.


Monthly Service Fee:

  • R100.00 (including VAT) for 4 channels

  • R25.00 (including VAT) per extra channel

Optional Monthly Service Fee:

  • R10.00 (including VAT) per additional individual number

  • R50.00 (including VAT) per block of 10 sequential numbers

  • R250.00 including VAT) per block of 100 sequential numbers


  • A IT HERO VoIP Solution

  • Reliable Broadband Internet connection

Frequently asked questions:

Which protocols are supported on the IT Hero Trunk Services

Both SIP and IAX are supported on the our Business Trunk Service.

How many direct dial numbers can I have with my trunk solution?

You can take as many direct dial numbers as you require.  We do however work on a 10 number to 1 channel ratio. For example, if you have a 4 channel trunk, you can have a maximum of 40 direct dial numbers.  If you require more than 40 numbers the channels on your trunk will have to increase accordingly.

What you need to get started:

A IT Hero Hosted Switchboard Solution or compatible VoIP switchboard/PBX; or compatible VoIP gateway (FXS or ISDN).

Plus a reliable internet connection.

View our VoIP Solutions

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