Replace your ISDN

Staveley Communications has been installing telephone systems since 2001 and has over 300 clients using the system across 450 sites.

SIP Trunks are a direct connection between your office and your provider, that allows you to make VoIP calls over the Internet, rather than via traditional forms of communications, such as analogue and copper-wire.


SIP is also carry other forms of media and communication, such as multimedia and video conferences, enhanced emergency calls, colleague presence information and instant messages.

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Why Choose SIP?

It’s Cost-Effective

You could save as much as 60% on call charges compared to traditional ISDN phone lines, with bundled calls to mobile and numbers abroad included for a fixed rental cost. There is no physical connections to a phone company, and you only purchase the necessary number of channels you need, or alternatively, pay only for the amount minutes used per month.


It’s Easy to Scale up or Down

Unlike traditional telephone lines, SIP trunks are sold by the channel. This means you can purchase exactly the number of channels you need. If you need additional channels, they can be purchased on-demand, at anytime, whenever you need them, so you aren’t overpaying for something you don’t need, you’re getting exactly what you want, and nothing more, or less.


It’s Easy to Administer

Lines can be activated within a minutes, saving you time and money. It’s easy to migrate, there’s no need for an engineer, and you can keep your current telephone number, while saving on call charges. In the unlikely event a problem should occur, any repairs and fixes can be done remotely by your provider, helping you save on call-out charges.


It Provides Business Continuity

Calls with SIP can be re-routed to another location such as another office or even your home, so business operations can remain seamless. Even if disaster strikes at your office or home, you and your staff can still receive calls and allow the business to run smoothly from a temporary location.


Keep your Existing Phone Number

If you so choose, you can also keep your original phone number, even if you’re switching from ISDN lines. This can save hours of administration work, updating websites, buying new business cards and informing partners of your new number, as well you and your staff having to learn and remember it.

What Our Customers Say

Find out how SIP Trunks have helped our customers and what they could do for you.

For a quick response, please use our Live Chat service.


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Contact Us

Or call our Sales team on 0845 075 8880

Office hours: 9am – 5pm, Monday – Friday

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Staveley Communications will not not use your details other than to contact you for your enquiry.

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Download user guides, whitepapers and leaflets.

User Collateral

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SIP Trunk Guide front cover
SIP Trunks: The ISDN Alternative

This guide will show you the benefits of replacing ISDN lines for SIP Trunks.

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SIP International Services

Find out how to benefit from International calls with SIP Trunking.

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Technical Collateral

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SIP Trunking Technical Support

Find and diagnose any SIP Trunking issues you may have.

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SIP Service Description

This document provides the technical specification of Staveley's SIP Trunk Service as supplied by Gamma.

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SIP Traffic Policy

This document defines governance for nuisance and malicious calls, for SIP endpoints.


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