Best VoIP Gateways & Routers in the UK: Where to Buy, How to Choose, and What Really Matters

Why a dedicated VoIP gateway or router matters

If you’re moving voice traffic to the internet or running a hybrid phone network at home or work, a dedicated VoIP gateway or router isn’t optional — it’s the backbone. These devices translate phone lines into SIP traffic, prioritise voice packets, and keep calls sounding clear even when your network is busy. Think of them as traffic controllers that stop voice from getting stuck behind a convoy of video streams.

What makes a VoIP gateway different from a regular router?

At first glance a VoIP gateway looks like any other router, but under the hood it speaks SIP, handles PSTN interfaces (like analog or ISDN), and offers call-centric features such as session management and codec negotiation. If you want plug-and-play voice via an ordinary broadband router, you might be fine — but for reliability, call quality, and multi-line environments, a gateway or VoIP-ready router is the smarter bet.

Key features to look for in VoIP gateways and routers

Shopping for a VoIP device can feel overwhelming. Before you buy, focus on a handful of features that actually affect day-to-day use: codec support, SIP compatibility, the number and type of voice ports, QoS, security, and remote management. These decide whether a device is a temporary fix or a reliable long-term solution.

SIP compatibility and codec support

Ensure the device supports standard SIP and popular codecs like G.711 and G.729. Those codecs determine bandwidth use and call quality — G.711 gives near-CD audio but uses more bandwidth, while G.729 is compressed and handy when bandwidth is limited.

Ports: FXS, FXO, and digital interfaces

Count your lines. FXS ports connect analog phones, FXO connects to the PSTN line, and digital interfaces (or ISDN gateways) handle larger trunks. For a small office, a unit with a few FXO ports is often enough; for larger setups, look for modular or rack-mountable options that scale.

Power over Ethernet (PoE)

If you’re deploying IP phones, PoE saves clutter by powering devices through Ethernet. Some routers and switches include PoE ports; otherwise plan for a PoE injector. PoE becomes especially handy in offices where neat cable runs matter.

Quality of Service (QoS) and traffic shaping

QoS ensures voice packets get priority. Without it, your calls can crackle or drop when someone starts a large file download. Good gateways and routers let you set QoS rules so voice keeps moving smoothly even under load.

Security: SIP ALG, TLS, SRTP and firewalls

Security matters more than ever. Look for support for encrypted signalling (TLS) and media encryption (SRTP). Be cautious with SIP ALG — it’s meant to help NAT but often causes problems. A built-in firewall and regular firmware updates are also essential.

Top UK retailers where you can buy VoIP gateways and routers

Where you shop affects price, warranty options, and support. Below are reliable UK retailers that stock a mix of consumer and business VoIP hardware — from off-the-shelf consumer routers to enterprise-grade gateways.

Amazon UK

Amazon offers vast selection, fast delivery, and lots of user reviews. You’ll find brands from entry-level TP-Link units to business-grade Cisco and Grandstream devices. Amazon is ideal if you want wide choice and competitive pricing, but double-check seller ratings and warranty terms.

Currys PC World

Currys is a mainstream option that stocks popular routers and some VoIP-capable devices. It’s a convenient stop if you want to see models in-store and combine purchase with other tech. For specialised VoIP gear, you might need a specialist seller, though Currys is good for consumer-grade needs.

Argos

Argos provides an easy high-street option for basic VoIP-ready routers and small business kit. The selection isn’t as deep as specialist sites, but if you need a quick replacement for a home office, Argos is practical and often has click-and-collect options.

eBuyer

eBuyer caters to tech-savvy buyers and small businesses. You’ll find a solid range of routers, switches, and some gateways. Stock varies, but their product pages typically include technical specs — useful when you’re comparing features like PoE or number of FXS/FXO ports.

Scan and CCL (CCL Computers)

Both Scan and CCL are well-known UK PC and networking retailers that carry business-grade networking kit. They’re great if you want brand-name gear (Netgear, Mikrotik, TP-Link) with clear specs and UK warranties. Their support teams can help match models to your needs.

Comms Express

Comms Express is a specialist telecoms and VoIP supplier in the UK. If you need SIP gateways, ISDN adapters, or PBX accessories, this is a go-to. They understand phone systems and can advise on compatibility with SIP trunks and handsets, which is handy when you’re moving beyond basic consumer routers.

VoIPon

VoIPon is another UK specialist focusing on VoIP products, spare parts, and expert advice. They target customers who need specific VoIP features, multiple port configurations, or compatibility assurances — ideal for installers and IT managers.

Box.co.uk

Box.co.uk stocks a mixture of business and consumer networking hardware. They’re useful for price-checking and often have bundles. For small businesses wanting to compare several mid-range models, Box offers a decent balance of availability and service.

Specialist supplier vs general electronics store: which should you choose?

If you’re buying your first router for home use, a mainstream retailer is fine. But when voice is business-critical, specialist suppliers matter. They know SIP trunks, can recommend gateway port counts, and may offer configuration support. Think of general stores as supermarkets and specialist vendors as your neighbourhood tailor.

Top brands to consider and why

Brands matter because firmware, longevity, and support differ. Here are brands you’ll see across UK sellers and the situations where they shine.

Cisco

Cisco is the go-to for reliability and advanced features. Their small-business routers and voice gateways offer excellent management but come with a steeper price tag. If uptime is non-negotiable, Cisco is worth the investment.

Grandstream

Grandstream strikes a strong value-for-money balance. They make gateways, IP PBXs, and IP phones that work well for SME deployments. Their equipment tends to be easier to configure than enterprise kit and supports a broad codec set.

DrayTek

DrayTek routers combine robust VPN, QoS, and VoIP features. They’re favoured by IT pros for stable performance and clear voice-focused features. If you need reliable remote access and phone traffic prioritisation, DrayTek is a solid pick.

Yeastar

Yeastar focuses on business telephony systems and gateways. Their products are tuned for PBX integration and SIP trunking, making them a common choice for growing businesses that want easy scaling.

TP-Link, Netgear, Mikrotik

TP-Link and Netgear cover the lower and mid-range markets, offering routers that can be VoIP-friendly. Mikrotik is a bit different — it’s feature-rich and flexible for the technically minded. Pick these brands if you’re balancing budget with control.

How to choose between models: home office vs small business

A home office needs simplicity and clear audio; a small business requires scalability and resilience. For a solo worker, a VoIP-capable router with SIP support and QoS is often enough. For businesses, look for gateways with multiple FXO/FXS ports, hot-swappable modules, or rack-mount options. Choose redundancy if missed calls cost you money.

Compatibility with UK phone systems and SIP trunks

UK environments sometimes mix PSTN lines, ISDN trunks, and SIP providers. Check that your gateway supports the interface you need — for older PSTN lines you’ll need FXO ports; for ISDN, a digital gateway; and for SIP trunks, standard SIP stacks. Confirm codecs and DTMF handling with both the gateway and your SIP provider to avoid surprises.

Installation tips and common pitfalls

Many devices are plug-and-play, but voice has quirks. Disable SIP ALG if you experience one-way audio. Set QoS rules to prioritise UDP voice traffic. Use PoE where possible to avoid power clutter. And always update firmware after installation — manufacturers patch security holes and improve SIP compatibility over time.

Budgeting: how much should you spend?

Expect to pay different amounts depending on needs. An entry-level VoIP router suitable for a home office might cost under a hundred; a small-business gateway with a handful of FXO ports and advanced features can run several hundred. Enterprise gear and rack-mount solutions will be pricier. Don’t buy the cheapest option if call quality matters — a small investment often avoids big headaches later.

Warranty, updates and long-term support

Check warranty terms and firmware update policies before buying. A device that isn’t maintained becomes a security risk. Specialist retailers sometimes offer installation or configuration services and extended support packages that make sense for critical deployments.

Final buying checklist

Before you hit buy, run through a quick checklist: how many simultaneous calls do you need, which ports are required (FXS/FXO), does it support your SIP trunk provider, is QoS configurable, is PoE needed, and can the unit be remotely managed? If you can tick all those boxes, you’re ready to pick a model and a retailer that matches your support expectations and budget.

Why comparing prices and specs pays off

Comparison matters because small spec differences can have big practical impacts — a missed codec, a lack of PoE, or disabled TLS can cause hours of troubleshooting. Use price and spec comparators to line up devices against your requirements. If you’re not sure, specialist shops often offer pre-sales advice and can save you time and money.

Quick recap: what to do next

Start by listing your voice needs — concurrent calls, legacy lines, handset types — then shortlist devices with the right ports and codec support. Compare prices at mainstream and specialist UK retailers, check firmware and support, and plan for QoS and security. That way you’ll end up with kit that simply works, rather than flipping between devices when problems arise.

Whether you’re equipping a cosy home office or outfitting a growing business, the right VoIP gateway or router makes voice feel invisible — clear, dependable, and worry-free. Take your time, ask questions, and pick gear that gives you room to grow.