What is SIP trunking and how will it benefit your business?

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What is SIP trunking?

Your voice and data connections are vital components of your business – but cost is also a crucial element. If you’re running multiple lines, their flexibility and how much control you have over them is crucial and the cost for this must be considered. SIP Trunking replaces standard phone lines with an internet-style connection, connecting your phone system to the public network providing a flexible and low-cost alternative to ISDN for inbound and outbound voice calls.

One of the key benefits of SIP trunking is that it is extremely scalable and flexible so can adapt depending on your business requirements. If you’re moving office or setting up a new one, SIP can be scaled up or down quickly, to meet with all your demands.

Number flexibility

SIP trunking supports your business by allowing you to decide which number you want to display on a call-by-call basis. Even if you’re making a significant move in location, or just wanting to grow your business without opening more offices, SIP trunking allows out-of-area geographic number ranges to be used – showing your business as local, despite being physically located elsewhere.

SIP trunking saves you money

Why have a separate voice and data connection when you can have both on one line? It’s a less costly and more reliable option than ISDN, and call costs are typically 75% less than BT’s standard calling rates. This means your telephone costs overall are much lower and you can also make free calls between connected sites and even international ones.

Nearly every business communications company will tell you that their services and products can save you money, but with SIP trunks there is real evidence to suggest that SIP trunking can significantly cut down on call costs, allowing you to simply sit back and enjoy the cost savings in your business.

SIP trunking offers greater flexibility

If you’re still using ISDN, the chances are that you are spending money on lines that you may not actually need all year round. SIP trunking gives you complete control of your lines. If your business hits a busy period and is in high demand, you can simply add more lines to keep up with demand. Similarly, you can reduce them when there is little demand and split calls to make handling more efficient.

SIP trunking comes with a contingency plan

Sometimes, when things go wrong that you just can’t control, it can really impact on business continuity. This could be a problem in the office, busier peak times than usual or a lack of connection.  When this happens, Tech IP’s SIP Trunking business continuity feature is designed to handle all of your emergencies with ease. It will automatically reroute any calls to back up sites in a number of seconds – so there is no disruption for your customers.

With the announcement from BT of a move away from ISDN with the intention of migrating all customers on to the IP network by 2025, introducing SIP Trunking into your business now, is one of the smartest technology moves your business can make.


  • SIP trunking can typically save businesses up to 50% on line rental and 25% on calls
  • A flexible and low-cost alternative to ISDN
  • Control how and when calls are being delivered
  • Sip trunking enables your business to streamline all communication when you move from separate data and voice lines, whether you’re working in the office or working remotely
  • Instant messaging
  • Video conferencing
  • Convenient address books sync’d between devices to keep you organised
  • Conference calls, with the ability to record calls for those members of the team who are unavailable that day.
Tech IP SIP trunks are only £9.95 per month…including 5000 free inclusive minutes to UK landline and UK mobiles.

We hope the above information is useful to you, if you would like assistance in understanding your best options then please contact us on 0800 505 3350. Alternatively you can download our telephone systems buyers guide as useful reference material or even run a Quick Quote to obtain a budget cost for a new telephone system in less than 60 seconds.



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