IT & Infrastructure
VoIP Phone Systems for Business
Lower call costs and the freedom to take business calls from anywhere, with your existing number ported across with no disruption to customers.
What does ITSL's VoIP service include?
ITSL sets up and manages VoIP (Voice over Internet Protocol) phone systems for London businesses, replacing traditional landlines with flexible, feature-rich calling over the internet.
Traditional landline contracts are increasingly expensive and inflexible, especially for businesses with staff working across multiple sites or from home, which is why VoIP has become the standard choice for growing SMEs.
We set up your VoIP business phone system end to end, including number porting, call routing and integration with existing tools such as your CRM or helpdesk.
Key benefits of VoIP
- Lower call costs compared to traditional landline contracts
- Staff can take business calls from anywhere with an internet connection
- Call routing, voicemail-to-email and auto-attendant features included
- Existing business numbers can usually be ported across without disruption
- Ongoing management and support included in our IT support plans
How ITSL delivers VoIP
- 1
Requirements review
We assess call volumes, number of lines and required features.
- 2
System setup
We configure your VoIP system, including routing rules and voicemail.
- 3
Number porting
We manage porting your existing business number where required.
- 4
Training & support
We train your team and provide ongoing VoIP support and management.
Tools & technologies we use for VoIP
- VoIP phone platforms
- Number porting services
- Call routing & voicemail-to-email tools
How much does VoIP cost?
VoIP setup and management is included as part of ITSL's IT support packages — book a free consultation for a tailored quote.
FAQs about VoIP
What is VoIP and why would a small business switch to it?
VoIP (Voice over Internet Protocol) lets businesses make and receive calls over the internet instead of a traditional phone line, typically at lower cost and with more flexibility for remote or multi-site teams.
Can we keep our existing business phone number with VoIP?
In most cases yes, ITSL manages the number porting process so your existing business number transfers across to the new VoIP system without disrupting customer calls.
Does VoIP require special hardware?
VoIP can run on existing computers, mobile apps or dedicated VoIP handsets, and we recommend the right setup based on how your team works.
How many phone lines can a VoIP system support?
VoIP systems scale easily from a single line to many, so the setup can grow with your team without new physical phone lines being installed.
What happens to our VoIP calls if the internet goes down?
Most VoIP systems support call forwarding to a mobile number during an outage; we configure this failover as part of your setup.
Ready to discuss VoIP?
Book a free consultation with ITSL or check our pricing packages to get started.