Business phone systems, VoIP & broadband in Southampton
Business phones, broadband and managed IT in Southampton — delivered by a team on your doorstep.
Atom IP is headquartered in Southampton and delivers business phone systems, business broadband, managed IT support, Microsoft 365, CCTV and call intelligence across the city and the wider Hampshire region. Our engineers know the local carriers, the local buildings and the local commute times — which shows up on site-survey day.
Everything in one accountable partner.
Business phone systems and VoIP in Southampton: options, number retention and switching
A business phone system in Southampton today means a cloud VoIP platform: each person has a business number that rings on a deskphone, a laptop softphone and a mobile app, with call recording, reporting and CRM integration configured centrally. Our head office is in Southampton, so design, installation, number porting and support are handled by engineers who can be on site across the city and wider Hampshire when a job needs it.
Southampton businesses still on ISDN or analogue lines need to move before the PSTN switch-off in January 2027. Your existing 023 numbers port to the new system — we confirm you are the customer of record, schedule the port and run the old and new systems in parallel so no inbound call is lost.
| Option | How it works | Suits which Southampton businesses |
|---|---|---|
| Cloud phone system (hosted VoIP) | Calls run over your broadband to a hosted platform. Deskphones, softphones and mobile apps share one number per user. | Most offices, practices, agencies and multi-site firms. |
| Microsoft Teams calling | Business calling inside Teams via Direct Routing or Operator Connect, alongside deskphones for reception. | Businesses already working in Teams all day. |
| Cloud system with CRM integration | Click-to-dial, screen-pop and automatic call logging into the CRM, with AI call summaries via Atom Insight. | Recruitment agencies, sales teams, professional services. |
| QuoteMate business number | A business number that rings an existing mobile, with call summaries and quote drafting. | Sole traders and small trades businesses. |
- 1
Review the current bill and contract
End date, notice period, and whether handsets are on finance. Our free contract review does this line by line.
- 2
Design call flows and numbers
Hunt groups, opening hours, voicemail-to-email, recording policy, CRM integration and who needs a deskphone versus a softphone.
- 3
Check connectivity
Voice needs sized bandwidth and a 4G/5G failover. We test the existing line before go-live.
- 4
Port numbers with parallel running
Numbers move on a scheduled date; the old system keeps ringing until the port completes.
Business broadband and leased lines in Southampton
Full-fibre availability is strong across most Southampton commercial districts — the city centre, Ocean Village, Millbrook, the Southampton Water business parks and out to Eastleigh and Chandler's Ford — often from more than one carrier. Leased-line lead times are typically 60–90 working days, so for an office move we order early and provide FTTP or 4G/5G as an interim. The right option depends on how much the connection carries: phones for a busy office or a dialling floor point towards a leased line; most other businesses are well served by FTTP with automatic failover.
| Option | What it is | Suits which Southampton businesses | Typical considerations |
|---|---|---|---|
| Business FTTP | Full-fibre broadband to the premises, up to around 900 Mbps down. Shared (asymmetric) service. | Most offices, practices, shops and hospitality venues. | Availability varies by street; install usually within weeks; pair with 4G/5G failover for continuity. |
| SoGEA | Broadband over the copper line without a phone service. Replaces FTTC ahead of the PSTN switch-off. | Addresses without FTTP yet; smaller offices with modest needs. | Speeds depend on distance to the cabinet; interim option until fibre arrives. |
| Ethernet leased line | Dedicated, symmetrical fibre with a service level agreement and repair target. | Cloud-heavy offices, dialling floors, sites that cannot lose connectivity. | 60–90 working day lead time; excess construction charges possible; sized to concurrent users and voice. |
| 4G/5G business broadband and failover | Mobile-network connectivity via a business router with external antenna. | Backup for any of the above; primary for temporary or hard-to-reach sites. | Automatic failover in seconds; data allowance sized to how long you need to run on it. |
The difference of a partner who actually knows Southampton.
Same platforms. Very different experience.
What Atom IP customers say.
“Good guys — worked with them to switch over from a previous very good supplier. They have gone above and beyond to understand our needs and bespoke systems to help support our specific needs. Transition over on getting their systems up and running was smooth. As a small business owner, trust and confidence are important to me.”
“We have been using Josh at Atom for a few years now. Service has always been amazing. Just today our router blew up due to a power surge and he came out promptly with a new one to make sure we were back online in time for trading. Would highly recommend.”
“There aren’t many telecom providers that can be described as truly honest and straightforward. Georgia was very well spoken and made me feel my company was in the right hands. Ollie and Josh responded promptly throughout getting my phones and security systems set up. The install was seamless with no drop in connectivity and no technical issues since.”
Tell us about your Southampton business.
A short conversation, no obligation. We’ll come back with practical findings for your site.
Southampton questions.
Sectors we serve in Southampton, and nearby locations
Sector pages cover the specific call flows, integrations and compliance for your industry. Nearby locations share the same engineering team.
Industries
All industries- Solicitors and Legal PracticesBusiness phone systems, secure broadband and defensible CCTV for UK solicitors.
- Recruitment Agencies and Staffing FirmsBusiness technology for recruitment agencies: phones, connectivity, IT and CCTV from one accountable team.
- Care Homes and Domiciliary CareBusiness phone systems, resilient broadband and CCTV for UK care homes and domiciliary care providers.
- Hospitality, Hotels and RestaurantsBusiness phone systems, guest Wi-Fi, EPOS-ready broadband and CCTV for UK hospitality.
- Manufacturing and IndustrialBusiness phone systems, resilient leased lines and PTZ CCTV for UK manufacturers.
- Trades and Sole TradersA proper business phone number, call summaries and quotes for UK tradespeople.
- Retail, Franchise and Multi-Site StoresBusiness phones, resilient broadband, guest Wi-Fi and CCTV for UK retail and franchise groups.
- Office-Based SMEsBusiness phones, Wi-Fi, Microsoft 365 and managed IT for UK office-based businesses — from one team.
Locations
All locations- Portsmouth, HampshireBusiness phones, broadband and IT in Portsmouth
- Winchester, HampshireBusiness phones, broadband and IT in Winchester
- Basingstoke, HampshireBusiness phones, broadband and IT in Basingstoke
- Fareham, HampshireBusiness phones, broadband and IT in Fareham
- Gosport, HampshireBusiness phones, broadband and IT in Gosport
- Havant, HampshireBusiness phones, broadband and IT in Havant
- Andover, HampshireBusiness phones, broadband and IT in Andover
- Petersfield, HampshireBusiness phones, broadband and IT in Petersfield
For recruitment agencies
Recruitment hub- Phone systems for Southampton and Hampshire recruitment agenciesSouthampton-based provider of phone systems, CRM dialling and call intelligence for Hampshire and South Coast recruitment agencies. Local team, UK-wide delivery.
- 50+ seat agenciesTelephony, connectivity and call intelligence for larger UK recruitment groups — governance, SLAs, phased migration, security review and consolidated reporting.
- Bullhorn integrationBullhorn telephony integration for UK agencies: click-to-dial from any Bullhorn record, inbound screen-pop, automatic call logging as Notes, call recording links and AI call notes. Confirmed against your own tenant.
Guides and insights
All insights- South Coast Business Connectivity: Broadband, VoIP and CCTV Across Hampshire in 2026A comprehensive guide to business broadband, cloud phone systems and CCTV across Southampton, Winchester, Portsmouth, Fareham, Eastleigh, Basingstoke and the Isle of Wight in 2026.
- Business Phone Systems in Hampshire: VoIP, Hosted PBX and the 2026 Buyer's GuideA Hampshire buyer's guide to business phone systems in 2026 — cloud phone systems, hosted VoIP, hosted PBX, SIP trunking, Microsoft Teams calling and the PSTN switch-off — with local pricing and installer coverage.
- Business Broadband in Southampton: Fibre, FTTP and Leased Lines ExplainedEverything Southampton businesses need to know about business broadband, business fibre, FTTP, ethernet leased lines and gigabit connectivity — with typical 2026 pricing across CityFibre, Openreach and altnets.