VOIP Telephones

Why now is the time to move from ISDN to SIP

As your business expands, the chances are you will look for a more flexible, reliable and cost effective solution for your telecommunication requirements. If you are still using traditional ISDN lines over the PSTN (Public Switched Telephone Network) from your telecoms provider, you could choose to upgrade from ISDN2 to ISDN30, which provides a maximum capacity of 30 lines, with a minimum requirement of 8 lines.

But this solution is not particularly flexible or cost effective for small businesses. Moving from **Multiple ISDN**2 connections to 8 **ISDN30** lines is a major jump in capacity and one that carries a significant increase in capital expenditure. Fortunately, there is a more cost effective and flexible solution for fast growing businesses.

SIP trunking is the modern replacement for traditional ISDN lines for both internet and <a href=”https://www.rhmtelecom.com/voice/”>voice</a>. SIP technology is based on high speed fibre lines to provide low cost calling around the world via the internet. SIP trunks are much cheaper to deploy than traditional ISDN lines, and they give you the flexibility of allowing you to add channels as you need them.

So what is holding you back from deploying SIP in your business? Well, SIP is wholly reliant on the quality and speed of your internet connection. The good news is that most small businesses in the UK now have access to fast reliable broadband connections.

That means technically, there is nothing stopping you trading in your traditional ISDN2 connection and moving to cheaper and more scalable SIP trunking. So why is now a good time to make the switch?

1. Increased flexibility

SIP trunking offers much more flexibility than traditional ISDN, you can scale up or down the number of channels (lines) you require at short notice with no minimum requirements. That removes the need to wait for lines to be installed and it allows seasonal businesses to increase capacity at busy times, while scaling back and reducing costs at others.

2. Improved resilience

Unlike traditional ISDN lines your SIP trunk can be monitored to protect your level of service. This helps maintain call quality and prevent unforeseen outages, which often plague ISDN lines.

And in the event of a major incident, SIP trunks allow you to route calls to another location without any loss of service. This is particularly useful if your business is located in an area at risk of flooding.

3. More cost effective

SIP trunks allow you to save a considerable amount of money on call costs and line rental. **With** SIP trunk connection***s*** you pay a small amount each month per channel and you can use as many or as few channels as you need. Additional trunks can be added in seconds

SIP trunks also allow you to make internal calls for free, even if they are between sites. Because SIP is a cloud based service you benefit from lower infrastructure and maintenance costs.

4. Support for ISDN is ending in 2025

BT recently announced that it was removing support for ISDN in 2025 and will begin moving legacy ISDN2 and ISDN30 connections over to SIP in the next couple of years. That shows that SIP is now a mature technology to base your business communications on, and makes now a good time to weigh up your options and get a competitive quote for replacement services.

For more information about the SIP trunking services we provide, get in touch with one of our small business telecoms experts on 0345 136 60 60.

Need more information or advice? Call us now 0345 136 60 60

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