Business Telephones: Hosted VoIP, Teams Phone & Mobile

One Partner for Every Way Your Business Makes a Call

If you’re searching for:

Hosted VoIP to Replace an Ageing Phone System
Microsoft Teams Phone for Calling Straight From Teams
Business Mobile Contracts Managed in One Place

You’re likely not just looking for a new handset. You’re looking for:

Business telephony that works the way your people actually work, wherever they’re calling from.

At CTRL-S, we provide and manage Hosted VoIP, Microsoft Teams Phone and business mobile as one connected service, because your phone system shouldn’t be three separate suppliers and three separate bills.

The Problem with the PSTN Switch-Off

Openreach is retiring the traditional phone network, and any system still running on analogue or ISDN lines will stop working when it does. Business owners don’t need another deadline to panic about, they need:

A cloud phone system that’s ready before the switch-off, not after
Clarity on whether Hosted VoIP, Teams Phone, or both is the right fit
Mobile contracts that don’t sit outside the rest of their telephony
One provider accountable for calls, not a landline supplier, a Teams reseller and a mobile network separately

Businesses that leave it too late risk losing the ability to make or receive calls at all.

If your phone system doesn’t match how you work, it’s the wrong fit

Our belief is in Business-Led IT. That’s why CTRL-S’s telephony service creates the stable foundation needed to unlock Business Alchemy, our strategic technology improvement framework available to all our clients, because we believe:

Calls should follow your people, not tie them to a desk
Teams Phone should be configured properly, not switched on and left
Mobile contracts should be managed centrally, not chased across three networks
Migration off the old network should happen on your terms, not at the last minute
Your telephony partner should manage the whole stack, not just sell you a handset

How CTRL-S Works

CTRL-S Business Telephone Services Include :

Hosted VoIP

Cloud-based phone systems with no on-site hardware, managed updates, security and uptime included.

Microsoft Teams Phone:

Calling straight from Teams, configured with the PSTN connectivity method that suits your business.

Direct Routing & Operator Connect:

We connect Teams to the phone network through the method that gives you the best cost and call quality.

Business Mobile:

SIM-only and device contracts across the major UK networks, managed as part of your telephony, not separately.

eSIM & Mobile Device Management:

Remote provisioning and management of mobile profiles through platforms like Microsoft Intune.

PSTN Switch-Off Migration:

We move you off analogue and ISDN lines before Openreach retires them, on your timeline.

Unified Billing:

One invoice covering VoIP, Teams Phone and mobile, instead of three separate suppliers.

Ongoing Management:

Moves, adds, changes and support handled directly by our team, not a call centre queue.

What This Means For CTRL-S Customers

A phone system ready for the PSTN switch-off, not scrambling after it
Calls that follow your team, in the office, at home or on the road
One bill and one point of contact for VoIP, Teams Phone and mobile
Mobile devices managed and secured centrally
Fixed, predictable costs across your whole telephony estate
Ongoing strategic improvement conversations

Instead of managing three telephony suppliers, you get one team who owns the whole conversation.

If You’re Looking for Business Telephone Support in the UK, CTRL-S is especially designed for:

Businesses still running on ISDN or analogue lines

Organisations that need to migrate before the PSTN switch-off, not after.

Microsoft 365 businesses wanting to call from Teams

Businesses that already use Teams and want calling built in properly.

Multi-site or hybrid teams

Organisations where staff need to make and receive business calls wherever they’re working.

Businesses juggling multiple mobile contracts

Companies wanting mobile brought under one managed, centrally billed contract.

SMEs and Owner-Managed Businesses

Businesses wanting telephony managed end-to-end, without an in-house telecoms specialist.

Most telecoms providers sell you a phone system, a Teams licence or a SIM, rarely all three properly connected, that isn’t enough for our customers. CTRL-S manages Hosted VoIP, Teams Phone and business mobile as one service, because our customers don’t measure success in handsets shipped; They get:

A single accountable telephony partner
A phone system migrated off the old network on their terms
Teams Phone configured properly, not just switched on
Mobile contracts managed and billed centrally

If this is just what you need, contact CTRL-S today.

Book Your Free Telephony Review Book a discovery call

Supporting Your Organisation Through Business Alchemy

For businesses looking to take a more strategic approach to how they communicate, our Business Alchemy framework provides structure and direction.

It allows us to:

Align your telephony with your organisation’s objectives
Support sustainable growth
Improve efficiency across teams
Adapt your communications as your business evolves

Explore Business Alchemy

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