3CX Setup · London
3CX Setup in London
Setting up 3CX for London organisations, where the licence is bought by simultaneous calls rather than by user. That single difference changes the whole sizing exercise — a hundred staff who are rarely all on the phone at once need far fewer channels than a headcount-based quote would suggest, and a busy contact team needs more.
Why this comes up
The problem
The system was sized on staff numbers, so it is either paying for channels nobody uses or blocking calls at eleven o'clock.
What you get
What we deliver
- Peak simultaneous calls measured from real data rather than estimated from headcount
- Licence tier chosen against that measurement, with headroom agreed deliberately
- SIP trunk provider selected and negotiated, since this is yours to choose
- Hosting decided — self-hosted, your own cloud, or a managed instance
- Firewall and SIP handling configured, because this is where call quality problems begin
- Extensions, ring groups and out-of-hours routing built to how calls actually arrive
Want this scoped for your business in London?
Thirty minutes, no charge, no sales script. You leave with a written summary of what 3cx setup would actually involve — whether or not you use us.
Working in London
London
London clients usually come to us because they want senior people actually on their project rather than a large agency's B team, and because Midlands rates buy considerably more delivery per pound.
Clients here are usually replacing an agency, and want senior people on the work at rates that are not Central London rates.
Sectors we work with in London
- Financial Services
- Professional Services
- Technology
- Media
- Hospitality
- Retail
What we work with
Technologies and platforms
- 3CX
- SIP trunking
- Yealink
- pfSense
Who we work with
Industries we serve
- Professional services
- Manufacturing
- Healthcare
- Property
- Logistics
Why us
Why London businesses choose Asionis
- Projects typically launched within 4–8 weeks
- No long-term contracts required
- All team members UK-based
- Dedicated account manager and development team
- Transparent reporting with monthly performance metrics
- Scalable from startup to enterprise
How we work
- Step 1
Free consultation
A 30-minute call to understand the problem. You keep the written summary either way.
- Step 2
Proposal
Scope, timeline and a fixed price, in writing, before anything starts.
- Step 3
Build
Short cycles with regular check-ins, so you see progress rather than hear about it.
- Step 4
Launch and support
We handle the go-live and stay available afterwards.
Other services in London
Looking for the full picture? See our 3CX Setup services, everything we do in London or browse everything we do.
3CX Setup in London — common questions
- How do we know how many channels we need?
- By measuring. Call records from the existing system show concurrent call peaks by hour and by day, and that figure — plus sensible headroom for growth and busy periods — is the number that matters, rather than any calculation based on how many people have a phone.
- Why does the trunk provider matter?
- Because you are buying it separately and it determines call quality and cost. Unlike bundled services where the platform supplies the calls, here the trunk is a negotiated contract of its own — which is an advantage when it is chosen carefully and a persistent problem when it is not.
- Should we host it ourselves?
- Only if somebody will genuinely maintain it. Self-hosting gives control and lower running costs, and it also means updates, backups and security are yours — organisations without that capacity are better served by a managed instance even though it appears more expensive.
- What causes most call quality complaints?
- Firewalls interfering with signalling. Features intended to help with voice traffic frequently break it instead, and the resulting symptoms — one-way audio, calls dropping after a fixed interval — are consistent enough that this is the first thing to examine rather than the last.
- Do you work with businesses across Greater London?
- Yes. We are based in Leicester, United Kingdom and work with clients throughout London, including London and the surrounding Greater London area. Most collaboration happens remotely, and we travel for kick-offs and key milestones.
- What kind of London businesses do you usually work with?
- Clients here are usually replacing an agency, and want senior people on the work at rates that are not Central London rates. Beyond that we work across Financial Services, Professional Services, Technology, Media, Hospitality and Retail.
- Do you cover the areas around London?
- Yes — we work throughout London, including Reading, Milton Keynes, Cambridge, Brighton. London is an urban area of roughly 9,000,000+, and we take on work across the wider Greater London region rather than the city boundary alone.
Talk to us about 3CX Setup in London
A 30-minute call with someone who would actually work on it. No sales script, no obligation.
- Projects typically launched within 4–8 weeks
- No long-term contracts required
- All team members UK-based
- Dedicated account manager and development team
- Transparent reporting with monthly performance metrics
- Scalable from startup to enterprise