Moving from ISDN to SIP

Communication Is Key

At Standard Utilities we believe communication is fundamental to the success of any business.

Today’s business climate is very different to yester year thanks to the power of the internet. With the assistance of smart communication tools businesses can successfully offer reliability and flexibility to their customers. However not everyone is prepared with the correct equipment.

Many companies are still operating with traditional Integrated Service Digital Network (ISDN) technologies and analogue lines for the provision of its voice systems. However, these are vastly becoming outdated or obsolete. Therefore, it is important to ask if it’s time to upgrade your lines of communication to enable you to satisfy your customers’ expectations? After all, there is nothing worse than a lack of communication between clients or employees which ultimately impacts on your business’ productivity.

Let’s us explore how telecommunications have transformed from ISDN to Session Initiated Protocol (SIP) trunking, shaping how businesses function today.

The Evolution of Telecommunication

Goodbye to Tradition.

Although we currently offer ISDN, it is believed that it is a dying technology. Which is why we are working hard to ensure the transition from one technology to another is as smooth as possible for our clients, with little disruption to business’ activity.

Qu. What is ISDN?

Integrated Services Digital Network (ISDN) provides the opportunity to transmit voice, video and data through traditional telephone circuit boards. It was first defined in 1988 and runs on copper wiring. However, it IS reliant on a physical infrastructure to manage calls and PBX functionality so it can often take up a lot of space and requires resources to maintain it. For example, if a business would like to add or remove an ISDN network it will require physical attention.

There is no quick fix for when things break!

Qu. What SIP?

Session Initiation Protocol (SIP) is a communications protocol that helps connect a business’ PBX to the provider’s national network via broadbroad, ethernet or a private circuit.

It is a flexible protocol designed to allow for real-time multimedia sessions between participants or groups. With the help of Session Initiation Protocol users can determine if they would like to answer a call, terminate a call, transfer or change the call parameters.

SIP is a scalable technology that allows business to effectively communicate as they continue to grow.

Why switch?


When a traditional ISDN connection goes down, it can take days before the problem is sorted. As a business owner it can be frustrating to be reliant on a provider or costly to install call forwarding options until the issue is resolved.

SIP trunking is a modern solution that comes with a range of features to help make maximize lines of communication. It even has instant failover and redirect options to ensure productivity is not impacted if there are any hiccups. As your phone system is off site, calls can work of another site within minutes should anything happen. The reality is, more and more businesses are opting into SIP solutions because cloud-based technology is enabling them to grow and be agile.

Support growth.

Implementation of SIP is seamless and will have little impact, if any, when it comes to disturbing productivity. This is great news for businesses who are adding new phone lines, opening new offices or who have employees working from home as they can be connected to the system instantaneously. The capacity of SIP enables lines to be effectively managed and call routing can easily be controlled without the help of a supplier.

Therefore, businesses can easily expand without work coming to a halt to allow for installation. That and business can keep existing numbers when moving to a different geographical location thanks to SIP trunking.


So many businesses are changing to SIP Trunking because of the reduced costs and increased benefits. As SIP trunking requires less physical presence and fewer lines then ISDN, it can help cut costs on required PBXs. Therefore, as your business continues to grow, the more you can potentially save.

We’ve worked with various clients who have enjoyed up to 40% per annum by upgrading their telecommunications with us.

Moving from ISDN to SIP

Phase one: What Suits Your Needs

By working with an experienced telecommunication provider your business can seek quality advice on how to move. Depending on the size and nature of your business you could implement SIP floor by floor; branch by branch transition; or even in one collective move. SIP can work alongside ISDN, so the changeover doesn’t have to be a case of switching from one to another. With a trusted provider, tests and checks will be carried out to ensure the correct solution is implemented.

Phase two: Current System Audit

As a provider we need to understand how your current service works in order to meet growing business demands. Therefore, we will identify your existing bandwidth connection to examine if additional or dedicated connections are required. A good provider will check in time and time again to ensure everything is running smoothly.

Phase three: Installing SIP

After analyzing the current situation and establishing what to implement, the next phase is to install! An obvious change and benefit will be the lack of physical infrastructure on site due to SIP requiring less space. Your business will also enjoy a seamless transition with minimal disturbance as SIP works alongside ISDN.

Phase four: Testing

SIP-based phone systems come with built in features that are each thoroughly tested before anything goes live to ensure the new system is working. That way you can easily integrate your existing business applications such as Skype for Business with your SIP solution.

This phase will not be noticeable to the day to day works but your IT department may notice an influx in activity during this period. But this is nothing to worry about and will soon return to normal.

Phase five: Go live

After your SIP provider is happy with phases one to four, your SIP phone solution will be able to go live. Depending on your initial plan your business could be live within a matter of hours or take up to a month. But no matter how long the transition period is it is important to remember that provisions will be in place to ensure you have a great experience with SIP.

Make the Change

The benefits of SIP trunking help provide a strong argument for businesses to make the switch. With its cost saving potential and reliability, it is a perfect solution for business who are looking to grow. It will also enhance the lines of communication both internally and externally, with minimal interruption during the installation phase. If your business is looking to make the switch from ISDN-based telecommunications, then contact Standard Utilities today. We will ensure the process is both simple and safe.

SU have over 15 years of experience in the business to business telecommunications and utilities industries. Contact us today to see how we can help you.