Keep the numbers customers know
Check porting eligibility early, map DDIs and decide which numbers, teams and caller IDs are needed before the migration is scheduled.
Business VoIP / VoIP telephone systems
VoIP telephone systems for UK SMEs.
Replace ageing phone lines or an inflexible phone system with a business VoIP telephone system built around how your people actually work. Keep your business numbers and choose the right mix of VoIP phones, desktop apps and mobile users, with a planned migration and ongoing support.
Keep existing numbersClear migration planUK support
What this can include
What a well-designed VoIP telephone system changes.
For an SME, the benefit is usually more than replacing a phone line. A good VoIP telephone system can simplify moves and changes, reduce missed calls, give teams more flexible ways to answer calls and provide a cleaner route away from legacy services. The design starts with users, numbers, call patterns, sites and connectivity.
Use the right phone for each role
Give reception and fixed desks physical Yealink phones where useful, while hybrid, remote and mobile staff can use Linkus desktop or mobile clients.
Build calls around the customer journey
Configure opening hours, hunt groups, queues, overflow, voicemail and routing so inbound calls reach the right people instead of simply ringing a desk.
Make the network part of the phone-system design
Assess bandwidth, latency, jitter, packet loss and resilience so voice quality and business continuity are considered before the system goes live.
Designed around the workplace
VoIP is strongest when the network and call flow are designed together.
Moving voice onto IP should improve how calls move around the business, not simply replace the line underneath an old setup. We review connectivity, resilience, users, numbers and routing before migration.
Browse Yealink handset options
How we deliver it
A VoIP telephone system should be migrated, not simply switched on.
01
Assess
List users, numbers, extensions, sites, analogue devices, current contracts and existing call flows. Identify what needs to change and what needs to stay.
02
Design
Choose the PBX approach, endpoints, SIP capacity, routing, connectivity and resilience around actual usage, including office, hybrid and mobile users.
03
Configure & prove
Build the system and test inbound and outbound calls, numbers, routing, queues, apps, handsets, failover and emergency calling before the migration date.
04
Migrate & support
Port numbers in a controlled window, support users through go-live and review the system and call data afterwards so issues can be resolved quickly.
Is it right for you?
Where this option works best.
Choose this route when you need a complete VoIP telephone system rather than simply replacing an external phone line. It suits SMEs that want business calling across office, desktop and mobile users with a planned migration and support around the service.
Choose this when
You are replacing legacy PSTN or ISDN-era services, moving away from an ageing PBX, supporting hybrid or remote staff, consolidating sites, keeping established business numbers or improving call handling that has become difficult to manage.
Consider another route when
Compare the solution against what you actually need. If your existing PBX is still suitable and only the external connectivity needs replacing, SIP trunks may be the cleaner change. If you want a broader cloud-based phone-system proposition, compare the cloud phone system option. If you specifically want Yeastar architecture and its associated features, the P-Series route may be more appropriate. For a wider review of phone-system options, start with the business phone systems proposition.
We can help you choose.
Tell us what you have today and what needs to improve. We’ll explain the options and recommend the setup that best fits your business.
Plan the change carefully.
We plan number porting, call flows, connectivity and user training before the system goes live.
Related topics
Useful if you are comparing options.
These pages cover the questions that usually sit next to this decision, without making you work through a glossary first.
NumbersBuyer guideCost guide
Virtual phone numbers
Need the number first? See how a UK virtual business number can route to desk, desktop or mobile users.
Choosing the best VoIP for a small business
Compare number ownership, support, resilience, endpoints and real operating cost.
What “free VoIP” really includes
A practical look at free calls, free PBX software and the costs that remain.
Tell us about your setup
Tell us what the system has to do.
We’ll use the information to size the setup and make the first conversation useful.
Useful next steps
Read more before you decide.
Use these guides to understand migration, system options and capacity before you get in touch.
Compare
Migration
Capacity
User experience
Phone-system architectures
Cloud, appliance/software and Yeastar + Teams integration compared by operating model.
Number porting timeline
See the main stages involved in moving business numbers to a new provider.
SIP channel calculator
Estimate a sensible starting point from concurrent-call demand rather than user count alone.
Unified communications
Bring desk, desktop and mobile users into one joined-up business communications environment.
Common questions
Frequently asked questions.
Short answers to the questions we are most often asked about this type of system.
What is a VoIP telephone system?
A VoIP telephone system uses an internet or IP network to carry business calls rather than relying on traditional telephone lines. For an SME, the important part is how the system is designed around users, numbers, phones, call routing and connectivity.
Is a VoIP telephone system suitable for a small business?
Yes, provided the system is sized and configured around the business rather than sold as a generic licence bundle. SMEs can combine desk phones, softphones and mobile use on one platform and scale the setup as their requirements change.
Can we keep our existing business phone numbers?
Usually. We check number portability with the current range holder and map the required numbers before a migration date is agreed, so the porting process can be planned rather than treated as a last-minute change.
What affects the cost of a VoIP telephone system?
The overall solution can depend on the number of users, desk phones and other endpoints, SIP capacity, connectivity, number porting, installation, configuration and ongoing support. The right combination depends on how the business actually uses its phones.
Do we need new desk phones?
Not always. Some roles benefit from Yealink desk phones, while others may be better served by Linkus desktop or mobile clients. Existing SIP devices can be assessed for compatibility before replacement is recommended.
What internet connection does VoIP need?
Voice quality depends on bandwidth, latency, jitter, packet loss and network design. We assess connectivity and resilience as part of the phone-system design rather than treating the internet connection as separate from the voice service.