Sip Trunks2019-02-28T14:51:24+00:00


The Benefits of SIP Trunks and IAX.

On top of being faster and at a lower cost to your business, there are plenty of other additional benefits you can get by choosing Gradwell’s IAX and SIP trunking services. These include:

  • Reducing or eliminating ISDN line rental charges
  • The fact you can enjoy affordable call tariffs for external calls
  • You can bundle multiple numbers
  • Free VoIP calls within the Gradwell network
  • If you have an older switchboard you may need a gateway – we can supply these.

Reduce Your Phone Costs

With no need to maintain a physical phone line and the cheaper cost of VoIP calls you’ll see the savings month on month.

Infinite Scalability

Let your setup grow as you do. With SIP it’s easy to increase the amount of Trunks as your business expands and lower rates apply for multiple SIP Trunks.

Packed with Features

Enjoy great features, such as advanced call routing options, free calls between sites and call centre functionality.

Never Miss a Call

You never need to worry about missing calls while you’re out and about because with SIP Trunks you can programme your server to forward calls to a mobile phone, alternate extension or another trunk group.

Unlike traditional phone setups where lots of physical wires were once needed, a SIP trunk allows a business to replace traditional fixed lines with connectivity via a SIP trunking service through the internet.

Simply put, Session Initiation Protocol (SIP) is used to create voice sessions over a data network connection through to your PBX box, without having to pay for an upgrade to your old box and/or pay for additional PBX box maintenance. They produce the same results as a traditional landline but they are virtual lines running through your internet connection.

Largely underrated, SIP Trunks are a fantastic choice for anybody wanting to switch to virtual telephony as they are easy to use, hassle-free and are a much cheaper alternative. The technology behind SIP Trunks is more than the usual ‘plug and go’ of landlines which makes them seem like a solution only suitable for the more technically-minded. This certainly isn’t the case and here are some of the business benefits:



SIP Trunk

£4per month
  • FREE setup

Not sure what you need?

Inbound SIP

Receive calls on your on-site PBX via a SIP destination or SIP domain.
UK and international numbers. Option to buy blocks of numbers. Includes PSTN failover option.

Outbound SIP

Make calls on your on-site PBX via a SIP destination or SIP domain.
UK and international numbers.

IAX Trunk

Receive calls on your PBX via an IAX destination or IAX domain.
UK and international numbers. Option to buy blocks of numbers.
Includes PSTN failover option.

SBC Licence

Allows you to route a SIP Trunk (In or Out) via an SBC platform, enabling communication with Lync and Avaya platforms.

SIP Trunking – an often overlooked option by businesses

The telephony marketplace and connectivity landscape has transitioned to a faster, more efficient, and entirely agile industry. An article written earlier this year suggests that 41% of businesses use VoIP telephony to reduce costs and improve efficiencies.* That is a nice figure, but it’s not nearly as high as one might think considering how long both have been around.

Businesses are really starting to recognise the importance of adopting clever and nimble technology to future-proof their organisations for the next decade. Embracing modernity is synonymous within all walks of the technology industry, and for telephony specifically – there is certainly still a huge future for SIP Trunking.

In a nutshell,  a Session Initiation Protocol (SIP) Trunk provides the same service you get from a traditional analog phone line. However, instead of a physical wire, a SIP Trunk is a virtual line provided by a SIP trunk supplier. The data circuit connects your phone system back to their network. In tech terms, it connects your PBX to the PSTN via broadband, Ethernet or private circuit into a network.

Since the 80s, as computer networking and digital audio has become more refined and easier to transfer,  VoIP and SIP Trunking suddenly became smarter choices for businesses looking to control their time and more specifically, their costs with lower cost line rentals and call costs. It’s also quite easy to switch  as no new fixed lines are needed and companies can use existing broadband connections.

Efficiency in the workplace is something we all strive for, and I can say with the utmost confidence that SIP trunking enables your company to expand overnight. Companies are most likely experiencing higher costs with their existing PBX through a combination of monthly phone bills  which include charges for incoming phone lines, long distance charges and IT and maintenance fees, all of which can be drastically reduced with a SIP Trunking solution.

Whether you are a small business just getting on its feet or are an already established company simply looking at the bottom line, SIP trunking allows you the freedom of a premium service at a fraction of the price.


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