
Understanding SIP Trunking
As the traditional Public Switched Telephone Network (PSTN) and ISDN lines (traditional landlines) are being switched off in 2025 it’s important to understand the benefits of SIP Trunking. SIP is a method of communication used to send voice and data traffic over the internet. SIP is commonly used for VoIP communications. Any business with a modern IP phone system can benefit from using SIP as their communication channel. These can replace your current ISDN or analogue telephone lines prior to the big switch off.
SIP is the modern way of connecting to the outside world from your telephone system. SIP Trunks work over the internet and can offer savings on large line rental fees and call costs.
Many SIP packages offer bundled minutes which straight away lowers your monthly bills. SIP Trunks are extremely flexible as they allow you to keep your number if you were to move out of the area or for example you could have a Birmingham phone number at your Manchester site.

Our SIP Trunk Packages
We offer extremely competitive call charges and line rentals. These include bundled minute packages or if you prefer, ‘pence per minute’ packages.
Unlike most line providers, we have our own team of fully qualified engineers who can prove whether a line fault lies with BT or if it is an internal premises fault. These are the same engineers who deal with all on site work.
Be aware that all ISDN and Analogue telephone lines are being phased out by BT and will cease in 2025. Due to this, the cost of maintaining these services are increasing which also means so are the rental costs. A much better and more cost effective solution is to use SIP Trunks or a VoIP Phone System for your voice requirements.

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The Benefits of SIP Trunks
Regarded to as the future of telecommunications, SIP trunking offers your business:
- Competitive Pricing
- Call Packages
- Bundled Minutes
- Reliability and Scalability
- Protection against the ISDN / PSTN Switch Off

Experts in SIP Trunk Configuration
At Barton Telecom Services, we’ve been installing SIP Trunks and working with industry leading providers and network carriers for over 10 years. Combining this with 30+ years in all things business telecoms, we have first hand experience in all things business communications.

Serving Northamptonshire and Wider Counties

Frequently Asked Questions
A SIP trunk is a virtual connection that facilitates the transfer of voice and other communications over the internet using the SIP protocol. Unlike traditional phone lines that use physical wires, SIP trunks operate over the internet, offering more flexibility and scalability for businesses.
Some key benefits of SIP trunks include:
Cost savings: SIP trunks often provide more cost-effective long-distance and international calling.
Scalability: Easily add or remove channels based on business needs.
Flexibility: Support for multimedia communication and various devices.
Disaster recovery: Ability to quickly reroute calls in case of emergencies.
Integration: Seamless integration with Unified Communications (UC) solutions.
Additional SIP Trunks can be added at any time. We increase your capacity with no need for any onsite work completed. This means we can have additional SIP Trunks live and working for you in minutes.
SIP trunks can enable communications in a variety of media, including voice, video and data. VoIP refers only to voice communications sent over the Internet.
Yes, you can have as many phone numbers you want from any area of the UK. You can also have non geographical numbers such as 03 or too.