sip trunking for business - Windsor Telecom



SIP is a ready-made replacement for ISDN, connecting a business’s existing PBX and phones to the public telephone network via an internet connection. SIP emerged through a growing need for reliable, flexible and scalable communications technology that enables growing businesses to manage communications effectively.

In a nutshell, your office telecom hardware can stay intact, the only thing that changes is the way you connect to the outside world.

Why have a separate voice and data connection when you can have both on one line? By discarding any unnecessary ISDN lines, you will be able to save a large amount of money. In addition, SIP trunking can typically save you a further 50% on line rentals and 25% on calls. By utilising the benefits of SIP trunking number flexibility when you’re moving office, you will not need to spend money on changing stationery, advertisements or listings. SIP trunking also allows you to make free calls between connected sites, even internationally.

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To find out how SIP trunking works and how it can be tailored to you, fill out our form or call and speak to one of our experts.


How is this different to a voip system?

A SIP trunk plugs in directly to your PBX system (For those who aren’t familiar, PBX simply stands for private branch exchange and is a telephone system used to switch calls between users in a business).

This means that a business can stick to a dedicated number of phone lines, as opposed to purchasing a phone line for each individual.

SIP trunks will eliminate the need to buy and manage VoIP Gateways as all phone calls come in via IP. No extra conversion often means better quality calls too.


In many cases your existing phone number/s can be ported to the SIP trunk so you don’t have to worry about updating any documentation or stationery.


Inbuilt disaster recovery – route calls anywhere, any time. With a virtual phone line, you can redirect your calls whenever and wherever you need to, as long as you have access to an internet connection.




Ability to make big savings on monthly charges

It’s expensive, and getting more expensive


Scale up your phone lines at will – instantly

New phone lines can take weeks to install.


Manage everything in one place

Changes can take time to happen and depend on an external company


The go-to technology for the future

Will be phased out by 2025


Handles emergencies with ease. Calls can be diverted to a backup site in moments

Hope nothing bad happens

Key benefits of a sip trunk system

A market leading network

A market leading network

We work with Gamma, a market leading SIP network provider. This means you can count on a reliable and trusted service.

Business grade resilience

Business grade resilience

Disaster recovery at its best. You can divert your SIP Trunks to alternative phone numbers quickly and easily, ensuring business continuity.

Move & your numbers move with you

Move & your numbers move with you

SIP trunking allows you to retain your numbers when you move office. No call forwarding necessary.

Cost Efficient

Cost Efficient

With SIP trunks, you only pay for the phone lines you use. This can mean big savings on your call package compared to ISDN

Flexible, scaleable manageable

Flexible, scaleable manageable

You have the ability to scale up your SIP channels according to your needs. Perfect for growing businesses.

Call handling technology

Call handling technology

You can rely on 24/7 support from our team.

Multiple sites, centralised management

Multiple sites, centralised management

Deploy SIP across your business and manage it all in one centralised place.

The death of ISDN

The death of ISDN

With ISDN being phased out by 2025, SIP is the go-to technology to ensure your business is future-proof.

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