About Maincoms
An engineering-led telecoms provider
Maincoms is a team of telecoms engineers and project staff based in Cosham, Portsmouth. We design, install and support voice, mobile, connectivity and network services for local businesses and for customers across the UK.
Locally, our engineers regularly work in Southampton, Fareham, Havant, Chichester, Waterlooville, Emsworth, Petersfield, Winchester and Guildford.
Who we are
Run by engineers
Our work is led by engineers rather than sales targets. Systems are specified to fit each organisation, installed to a documented standard and supported by the people who built them.
Our customers range from small offices to contact centres and multi-site organisations. Many are local to Portsmouth and the South, and others are spread across the UK; they all receive the same direct access to our engineers.
- Design, installation and support by one team
- Based at Acorn Business Centre, Cosham
- Authorised reseller for EE, Vodafone, O2 and Three

Principles
How we work
Engineering first
Recommendations are based on technical suitability.
Clear advice
We explain options and trade-offs plainly, including when a change is not worthwhile.
Local and national
Our base in Cosham lets us attend local sites quickly, and remote support serves customers anywhere in the UK.
Continuity
The team that installs your system remains responsible for supporting it.
Accreditations
Partnerships and recognition

Gamma Technical Alliance Partner
Recognises engineers trained across Gamma’s product range, including the Horizon hosted platform.

Yeastar Certified Experts
Our engineers are certified by Yeastar to design, install and support P-Series systems.

Comms Business Awards 2023
Finalist, Reseller of the Year (SMB).
Contact our team
Call or email to discuss your requirements with an engineer.
