Business VoIP systems
Cloud phone systems and hosted telephony platforms with desk phones, softphones and mobile apps, built for hybrid teams.
Business VoIP, hosted telephony and SIP trunks
Cloud phone systems, SIP trunks and support that keep calls clear, controllable and easy to manage for IT, finance and operations teams.
We design, install and support VoIP platforms, Yeastar phone systems and SIP connectivity for offices, contact centres and hybrid teams across the UK.
Typical response within 2 working hours
By submitting, you agree to our privacy policy.
One partner for business VoIP, phone systems and SIP trunks – so you can simplify contracts and focus on callers, not dial tones.
Cloud phone systems and hosted telephony platforms with desk phones, softphones and mobile apps, built for hybrid teams.
Design, supply and support for Yeastar P-Series PBX systems, with call queues, recording, wallboards and CRM integration options.
Carrier-grade SIP trunks to replace ISDN and legacy lines, with geographic numbers, failover routing and clear monthly costs.
Telecom terms can sound more complicated than they really are. Here is a friendly rundown of what call channels, SIP lines and concurrent calls actually mean in day-to-day use.
A call channel is simply one active phone call. If you have 5 channels, your organisation can have 5 calls happening at the same time – inbound or outbound.
Think of channels like lanes on a motorway: more lanes means more calls can travel at once, without queues or busy tones.
A SIP trunk is the digital version of a phone line. Instead of a copper line, calls travel securely over your internet connection.
One SIP trunk can carry multiple channels. Example: a SIP trunk with 10 channels lets 10 people make or receive calls at the same time.
“Concurrent calls” is just another way of saying how many calls can be live at once on your system.
Even with 100 staff, you might only need 8–12 concurrent calls depending on how many people regularly use the phone and when your busy periods are.
Your phone numbers sit on top of your channels. Behind the scenes, we control how those numbers behave and where calls land.
Calls can be routed to:
All of this uses the same pool of channels, so the design is about making sure you have enough “lanes” for the call traffic you expect.
You don’t need to arrive with the perfect number – that is what we help you work out.
We look at:
The aim is simple: no busy tones, no overspending and no dropped calls. We can also adjust the number of channels as your organisation changes.
Common questions from organisations about moving to VoIP, hosted telephony and SIP trunks with Zero Telecommunications.
Yes. We plan number porting as part of the project so callers experience minimal disruption while you move to the new platform.
Yes. We liaise with IT around networks, security and integrations, and with operations or finance around call routing and costs.
Absolutely. Modern VoIP platforms treat multiple sites and remote staff as part of one system, with centralised routing and reporting.
Expert advice on telecoms and connectivity for your business.
With the eventual end of the Public Switch Telephone Network (PSTN) you may be left questioning what will happen.
Learn the basics of the Softphone and how it can be beneficial for businesses to switch to a solution that gives you and your employees freedom to recieve calls from home, on the road or in the office.
Switching phones can be a mess, a lot of manual work, new systems and features to learn but most of all, it can impact your routine. Learn about the benefits of changing to VoIP and how it makes your day to day job easier.
Tell us about your users, sites and call volumes. We aim to respond within two working hours with options for VoIP, hosted telephony and SIP.
By submitting this form, you agree to our privacy policy.
Join organisations across the UK that trust Zero Telecommunications for reliable VoIP, hosted telephony and SIP trunks with clear costs and responsive support.