Voice connectivity

Simplify your business calling and prepare for the future, with our VoIP (Voice over Internet Protocol) lines and services.

VoIP phone systems for medium businesses

Efficient

The simple, reliable and efficient alternative for your phone calling systems.

Flexible

Easy to migrate, manage and scale as you make the jump from legacy systems.

Cost saving

Clear and predictable pricing models with great call quality.

Future proof

Transform your physical lines to virtual lines with VoIP.

SIP trunking

Move to internet-based calling for greater control and cost savings. We’ll help you make a seamless transition before physical phone lines are switched off in 2027.

View SIP trunking

Inbound Voice

Manage, monitor and optimise your incoming business calls with our simple, reliable platform. Ensures priority callers can get through to the right channel directly without delay.

View Inbound Voice

Insights and resources

Learn more about how our voice connectivity services can help your business stay ahead.

A reliable, secure phone service for NHS 111

Our award-winning network is helping NHS 111 connect patients to local healthcare services.

Get ready for the PSTN switch-off in 2027

The PSTN circuits will be completely replaced by VoIP by Jan 2027. We can help you make the switch to VoIP seamlessly.

Contact our sales team (for 10-249 employees)

Opening hours: 8am - 6pm. Out of hours support* is available from 6pm - 8am.

Chat with us

Get instant help from our digital assistant, or transfer to a business sales advisor to buy.

Call us

Call us by selecting the best number that matches your business need.

Call me back

Busy right now? We’ll call you.

Request a callback

Out of hours support is available between 6pm-8am from Monday to Friday. This includes weekends and Bank Holidays.

The out of hours services you can receive depends on whether you’re a Foundation customer or a Tiered customer. Our out of hours service matrix outlines what support you can receive during out of hours periods.

	Foundation	Tiered
DPA Process for End Users
Bar CTN (Lost or Stolen)
Request PUK Codes
Device Support
Voicemail Reset
Make PAC Requests
Raise a Coverage Issue
VCO Log-In Support
SIM Activations /SIM Swaps
Request a Non Chargeable Recovery Call Back**
Request a Chargeable Recovery Call Back**
Lift International + Roaming
Cancellation Procedure
Request NUC Codes
Change Diverts
Lift Content Control
Sure Signal Support
Chargeable Requests
Unbar CTN
User Secretaries Allowed***

**Following completion of diagnostics, if it’s determined the device is faulty, a form will be completed and submitted. The advisor will confirm the Annovo team will contact the customer during core hours.

***Applies to main contacts only who can complete requests on behalf of an end user.