Business Communications

Modern business phones that work wherever your team does

Replace ISDN, analogue lines and clunky on-prem PBXs with cloud VoIP, 3CX or Microsoft Teams calling. Crystal clear UK calls, mobile apps, call recording and lower monthly costs.

Choose your phone platform

Hosted VoIP

Fully hosted cloud phone system — handsets, mobile app, voicemail and routing.

3CX Phone System

Industry-leading 3CX — self-hosted or cloud, with web meeting, mobile and CRM integrations.

Microsoft Teams Calling

Turn Microsoft Teams into your full phone system with direct routing and UK numbers.

SIP Trunks

Keep your existing PBX but ditch ISDN — modern SIP trunks at a fraction of the cost.

What's included with our phone systems

UK geographic, non-geographic and mobile numbers
Number porting from your current provider
Desk handsets, headsets and mobile apps (iOS/Android)
Call recording with secure storage (PCI-compliant available)
Auto-attendant, hunt groups and time-of-day routing
Voicemail-to-email and missed-call reporting
CRM integration (HubSpot, Salesforce, Dynamics, custom)
Microsoft Teams direct routing where required
Call analytics dashboard and live wallboards
UK support and on-site engineer for installations

Why Essex businesses pick our phones

ISDN switch-off ready

All UK analogue and ISDN lines retire by 2027. We migrate you cleanly, ahead of the deadline.

Half the cost of line rental

Most businesses cut their telephony bill by 40–60% moving from ISDN/BT to hosted VoIP.

Works from anywhere

Office, home or mobile — same number, same call recording, seamless handover.

We install, we support

Engineers configure, test and on-site install in Essex — no remote-only handoff.

How it works

01. Free phone audit

We review your current bill, lines and features — and quote a like-for-like cloud replacement.

02. Port & install

We port your numbers, configure call flows and install handsets on-site.

03. Train & support

Quick training for your team, then we're on call for any tweaks or new starters.

Frequently asked questions

What is the 2027 switch-off?

BT and other carriers are retiring all analogue (PSTN) and ISDN lines by January 2027. Every business still on those lines needs to migrate to VoIP or SIP before then.

Can we keep our existing phone numbers?

Yes — we port your numbers across cleanly. There's no number change for your customers.

Do we need new handsets?

Often no — many existing IP handsets work with our platforms. Where you need new ones, we offer rental or purchase.

Does it work with Microsoft Teams?

Yes — via Teams Direct Routing we make Teams a full phone system with proper UK numbers, call recording and routing.

What about call recording for compliance?

We offer full call recording with encrypted UK storage, plus PCI-compliant pause/resume for taking card payments.

What happens if the internet drops?

Calls automatically fail over to mobile apps on 4G/5G or to a backup number — no missed calls.

IT services

Managed IT Support — Your outsourced IT department in Essex — proactive support and monitoring to keep your systems running, from weekday cover up to 24/7/365.

Cloud & Microsoft 365 — Cloud desktops, private cloud and hybrid hosting in our UK Tier 2 data centre — all managed for one simple monthly cost.

Cyber Security — Protect your digital assets, networks, and data with cybersecurity services tailored to your business. From Cyber Essentials certification to firewalls, email security, endpoint protection, and security reviews — we help you navigate the evolving threat landscape with confidence.

Backup & Recovery — Our robust, fully managed Backup and Recovery System — powered by Hornetsecurity — protects your critical data across Microsoft 365, physical servers and more. Automated, encrypted backups with flexible retention and granular restore options, so your data stays secure, accessible and recoverable.

Business Communications — Replace ISDN, analogue lines and clunky on-prem PBXs with cloud VoIP, 3CX or Microsoft Teams calling. Crystal clear UK calls, mobile apps, call recording and lower monthly costs.

Infrastructure Setup & Maintenance — At Internet Assist, we provide robust and secure IT infrastructure solutions designed to support your business's operations and growth. From on-premise servers and networking equipment to cloud-based environments and virtualisation, we design, implement, and manage the systems that keep your organisation running smoothly.

Bespoke Software Development — We deliver powerful, custom-built software that solves real business challenges — from bespoke applications and web portals to mobile apps and API integrations. Focused on usability, scalability and security, with measurable results.

Web Design & App Development — From custom web design to bespoke web apps and native iOS/Android mobile apps, we create digital products that look great, work beautifully and help your business grow.

About Internet Assist

Internet Assist is an IT services company based in Maldon, Essex, providing managed IT support, cloud services, cyber security, backup and disaster recovery, business phone systems (VoIP), IT infrastructure, software development and web design to businesses across Essex, London and the UK since 1996.

Founded: 1996 (30+ years in business)

Clients supported: 500+

Accreditations: Microsoft Partner, Cyber Essentials Plus, ISO 9001

On-site response: < 1hr; monitoring: 24/7

Address: Network House, Station Road, Maldon, Essex CM9 4LQ

Phone: 01621 840014

Email: enquiries@ia.uk

Opening hours: Monday–Friday, 08:30–17:30

Free 30-minute IT assessment: book online