Engineering-led business telecoms
Business communications, engineered properly.
Maincoms designs, installs and supports voice, mobile, connectivity and network services. From our base in Cosham, Portsmouth, we look after local businesses and customers throughout England, Wales and the rest of the UK. Every system is specified by an engineer, tested before handover and supported by the team that built it.
✓ Gamma Technical Alliance Partner ✓ Yeastar Certified Experts ✓ Engineers based in Cosham
Line monitoring active
Faults flagged before they affect users
Engineer support
Monday to Friday, 09:00 to 17:15
Out of hours by arrangement
Network and technology partners
Services
Voice, mobile, connectivity and networks under one support agreement
We supply and maintain the full communications stack, so there is one point of contact when something needs attention.
Business phone systems
Hosted systems on Gamma Horizon or Yeastar P-Series Cloud Edition, or a Yeastar system on site, designed around how your organisation handles calls.
Mobiles, SIMs and eSIMs
Handsets, SIM-only and eSIM connections on EE, Vodafone, O2 and Three, with usage controls and spend alerts.
Business internet
SoGEA, full fibre, leased lines and 5G, with managed routers and 4G or 5G failover to keep your business running.
Wi-Fi and networking
Managed Wi-Fi, mesh networks and complete network installations, from a single access point to multi-site infrastructure.
Software and integrations
Call recording, IVR, CRM integration, SMS, WhatsApp and web chat, configured around your call flows.
AI and automation
Automation built into the platforms we supply, and bespoke workflows designed around your processes.
Our process
A structured approach to every installation
The same four stages apply whether we are connecting a single office or migrating several sites.
Survey
Site, network and existing services assessed
Design
A solution designed around your individual requirements
Install
Staged, tested and documented before go-live
Support
Monitoring and direct access to our engineers
Engineer’s note
Why we survey first
Most voice quality problems trace back to the local network rather than the phone system. Before installation we check bandwidth, QoS, VLAN configuration and Power over Ethernet capacity, so the system performs as expected from day one.
2027 switch-off
The PSTN and ISDN networks close on 31 January 2027
Openreach is withdrawing copper-based PSTN and ISDN services. Any equipment that relies on them, including phone lines, alarm diallers, payment terminals and lift lines, must move to a digital service before that date. We audit every circuit and device on site and plan the migration in stages.
Time remaining
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Gamma
Technical Alliance Partner
Yeastar
Certified Experts
Finalist
Comms Business Awards 2023
09:00 to 17:15
Monday to Friday, out of hours by arrangement
After installation
Monitoring, business continuity and cost control
Installation is the start of the service, not the end of it.
Proactive monitoring
Lines and devices are monitored, so faults are identified and investigated early, often before users are affected.
Business continuity
Backup connections and documented divert plans keep calls, card payments and cloud services running if a site loses power or connectivity.
Usage and cost control
Online account management provides spend limits, usage reporting and alerts across mobile and fixed services.
Customer feedback
What our customers say
Maincoms have installed a new telephone system for us recently and have been fantastic. Customer Service is excellent. Nothing is too much trouble and the team spent time explaining what was happening every step of the way. Would highly recommend Maincoms if…
Read the full reviewExcellent service from start to finish. Our new internet and phone system was installed quickly and professionally, and everything has been running flawlessly. The team was responsive, knowledgeable, and made the whole process stress-free. Highly recommended!
This team take service seriously. Having had a dreadful few years with our previous provider, Mark, Dan and the team at Maincoms are like a breath of fresh air. Real people solving real problems, really quick. They always pick up the phone, they always…
Read the full reviewReviews from Google Maps
Contact
Speak to an engineer
Tell us about your site and what you need. One of our engineers will review the details and reply, usually within one working day.
Unit 5, Acorn Business Park, 5 Northarbour Road, Cosham, Portsmouth PO6 3TH
Monday to Friday, 09:00 to 17:15
Out-of-hours support by arrangement