Solving your ICT Issues
So you can focus on your business
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ipv6 ready


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VOIP Consultant

Voice Over Intenet Protocol is superseding traditional telephony. SIP Trunks and hosted PBX are the future of communication.

We have proven VOIP design skills, and are one of only a few businesses that have designed and implemented a platform with direct access into the UK's core telephone network and 999 emergency services.

System & Network Design

Linux Servers, Opensource, Relational Databases, Local Area Networks & Wide Area Networks (VPN, VLAN and Qos), Wireless links, Fibre links, Routers and Firewalls.

Our success is driven by the wide range of skills that we possess and the collaborations we have with many engineering and information technology businesses.

ICT Diagnostics

Information and Communication Technology diagnostics keeping computing and communications systems running. Telephony diagnostics from SIP server down to the packet level on the wire.

We have proven diagnostic skills, we are here if you need help...


The End of Life of ISDN/PSTN Networks – What’s Going to Happen...


Here are just a few our projects

SIP Trunking

Engineering open source for carrier grade communication

B2B Gateway

Connecting with Openreach on the EMP platform

Call Billing

A fully automatic telephony call billing system

Server & Data Centre

We design systems and networks and have resiliance with multiple data centres

Open Source

From the start,  A2 Engineering Services has been pro-open source

Customer Feedback

Do we do a good job?  See what our customers have to say


Adrian has over 40 years' experience in the telecomms industry. For 8 years he worked as a consultant providing advice and guidance on a wide range of technical projects. For the last 14 years Adrian has run A2 Engineering Services.

Adrian started his working life as an appentice working for Post Office Telecommunications, which later became BT. Working for BT offered a virtually unparalleled opportunity to learn technical skils and drive personal development.

While with BT Adrian worked with the BBC at many outside broadcasts, on one occasion looking after the audio transmission for Songs of Praise from Bakewell Church. Adrian installed special monitoring circuits at mines for British Coal, and even worked on fluid level sensors at a sewage works! One more unusual job was to set up a forty mile long test lead to measure the difference in earth potential between power stations.

Adrian has also worked as a lecturer at Castle College in Nottingham, teaching computer programming to HNC level.

As a consultant, Adrian led a number of IT projects, both in the UK and abroad. This work included capturing and documenting business problems, analysing problems and identifying the root causes, translating findings into requirements, assessing prioritisation and gaining budget to deliver the programmes. He was also involved in liaising with suppliers and consultants, validating design proposals, overseeing testing and business deployment to ensure system designs aligned with business objectives and that problems were correctly resolved.

Alison started her career as an archaeologist, but after getting married to Adrian in 1989 went to work for a law firm in Nottingham. Alison is now involved in the running of A2 Engineering Services and also finds time for many types of craft work, when she is not helping Adrian with the accounts!

Alison and Adrian also have a smallholding at Sibthorpe and keep sheep, chickens, geese, guineafowl and emus. They produce a small number of free range hen and emu eggs for which there is often a waiting list!

  • 2009

    A2 Engineering Services is Born

    Primarily operating in the Electrical Engineering sector we quickly found there was gap that needed to be bridged between conventional Electrical Engineering and emerging ICT technologies. With a unique view across several industry sectors, we started to develop ICT Solutions.

  • March 2011

    Our first Major ICT Project

    We were invited to develop a solution for a telecommunications company to interface directly with BT Openreach. We developed and launched a Business to Business Gateway and installed our first servers on the Internet to provide various services for our customers.

  • December 2015

    Transition in to Full ICT Business

    With over 28 years experience in the telecommunications industry with BT, we decided to use our wealth of knowledge of IT and telephony and concentrate on purely ICT related projects. The SIP Trunking platform design and build began.

  • July 2017

    Launch of a Hosted Telephony Platform

    With the success of the SIP Trunking VOIP platform, we were asked to work on a hosted PBX solution providing unlimited extensions, voicemail to email, music on hold, call parking, automatic phone provisioning, automatic fraud detection and much, much more...

  • June 2019

    Hosted Telephony Platform Grows to Twenty Five Servers

    Using only Open Source components, the hosted PBX solution gains popularity. To meet increasingly complex customer requirements planning for our own Open Source product begins...

  • January 2022

    DjangoPBX is Launched

    Our very own VoIP Telephony solution is created on Github, to this day it remains Free and Open for anyone to use.

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Meet The Team

We are here to help.

Alison Fretwell


Sammy Dog

Head of Canine Relations

Adrian Fretwell

Lead Consultant

Alison looks after all the boring stuff like accounts and invoices. If the issue is technical, and I mean seriously technical, Adrian gets to sort it out!

Contact Us

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