DiD UK

UK SIP Trunk Provider

Premium SIP termination, business solutions for UK callcenters

Local
UK wide
0800
NGN 084XX DID numbers

Complete solution for UK SIP trunking

DID Logic offers premium, ISDN-grade connectivity to UK fixed and mobile networks at extremely competitive rates. Calls are routed over highest-quality networks directly to a Tier1 carrier.
It is hard to impress a seasoned VoIP professional with UK termination – yet our beautiful voice quality always does.
Customers are delighted with the performance and stability of DID Logic UK SIP termination and origination.
UK DID numbers (100% UK coverage)
London - $0.78/month
Oxford - $0.78/month
Birmingham - $0.99/month
800 Freephone - $0.99/month
Nottingham - $0.45/month
Any area code available for provisioning.
SIP rates to the UK
Landline - $0.0049/min
Vodafone - $0.0320/min
H3G - $0.0320/min
T-Mobile - $0.0320/min
O2 - $0.0320/min
NGN 08XX - $0.1021/min
Orange - $0.0320/min
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If you wish to contact us by phone, please call the number below:
+448001120899

Powerful call center capacity – send your UK traffic at less that 1/2 US cents per minute. This is a premium product that offers incredible ASRs and very low PDDs. Boost your outbound sales efficiency by setting up a high-quality, high-capacity UK trunk with DID Logic.
Massive UK DID coverage – all area codes available, geographical, toll-free, nationwide and NGN. Starts at $0.40/month and there are no minimums. Up to 500 channels per DID, actual capacity.
Call forwarding to UK mobiles – excellent option for busy professionals and consultants. Landline quality and Caller ID capable. From only $0.03/min to most UK mobile networks.

What to expect

The UK is our best-connected location. Whether you are sending calls from outside the UK or locally, our inbound and outbound capacities are virtually infinite.
Business customers can send their own CLI – switch all outbound voice to our SIP trunk and send your existing numbers as Caller ID.
Unlimited channels. Send 10, 100 or 10,000 channels at no extra cost. Only pay for minutes.
UK landlines $0.0049/min, $0.03/min mobile networks ($US, no taxes of any kind).
G711 u/a, G722 HD, GSM and G729 codecs supported, wideband codecs recommended.
Premium SIP termination only – no grey routes, no economy routes. Tier1/PTT only.
PDD (post-dial delay) 0.3–1.5 seconds to UK ringback.
0800 UK DID numbers with massive inbound channels and low per-minute charge.
DID Logic has hundreds of on-shore and off-shore UK call center deployments. Customers report better ASRs (average seizure rates) to the United Kingdom networks than they’ve ever seen before with any VoIP provider. If the number exists, your call will get established (unless the number is occupied). You get higher agent efficiency – which means less time spent redialing, and fewer leads missed.
Our focus is on quality, and we invested significant amounts in maintaining direct routes exclusively. Grey route means G729 codec unfortunately. If your agents are involved in outbound sales, their leads capture rates are gravely affected by sub-par voice. G729 cuts of major portion of human voice frequencies to save bandwidth (and this is why it's an economy, grey route).
It's still an OK line, you can even hear the other party well, but the spectrum isn't there, nuances are lost, and even your brightest and talented employee will not sound as persuasive to the lead. You may be using G711 to your current supplier, but if they call it "grey" then they inevitably have to backhaul it via G729 to some other aggregator. This makes matters even worse as transcoding is now involved. We avoid transcoding:it's G711 all the way from the originating party to the TDM circuit.
Please feel free to contact us via email with a short summary of your UK deployment, and we will be happy to recommend one of our many tried-and-tested setups. The DID Logic trunk readily supports Asterisk, Freeswitch, 3CX, Nortel and the majority of other SIP-based PBX products – both software and hardware-based.
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Free trial is available for IT infrastructure managers and developers.

Key Features to Look for in a UK SIP Trunk Provider
Not all SIP services are the same. Businesses should evaluate several factors before selecting a provider to ensure they get the best solution.
Call Quality and Reliability
A high-quality SIP trunking solution should offer HD voice clarity with minimal latency. Look for providers with low jitter, minimal packet loss, and strong redundancy measures to ensure consistent call quality.
UK DID Number Availability
For businesses operating in the UK, having local UK DID numbers ensures that customers can reach your business easily. Some SIP trunking providers, like DIDlogic, specialize in providing UK DID numbers for local presence and customer engagement.
Scalability for Business Growth
The ability to add or remove SIP trunks as a business expands is crucial. Scalable SIP solutions enable businesses to handle increasing call volumes without major infrastructure investments.
Security and Fraud Prevention
Secure SIP trunking services protect businesses from VoIP fraud, call interception, and unauthorized access. Features like encryption, authentication, and call monitoring help safeguard communications.
Integration with PBX and VoIP Systems
The best SIP providers offer seamless integration with:
On-premises PBX systems
Cloud-based hosted PBX platforms
Unified communications services
Ensuring compatibility with existing business phone systems prevents costly upgrades.
Key Benefits of SIP Trunking in the UK
Benefit How It Helps Businesses
Lower Costs Eliminates the need for traditional landlines, reducing call expenses.
Scalability Easily add or remove SIP trunks without physical installation.
Flexibility Works with hosted PBX systems, cloud communications, and VoIP platforms.
Business Continuity Call routing ensures uninterrupted business communications even during network failures.
Advanced Features Supports call forwarding, mobile integration, unified communications, and HD voice quality.
Switching to SIP trunking is a straightforward process. Here’s how businesses can migrate from traditional phone lines to a VoIP-based SIP trunking service.

How to Set Up SIP Trunking for Your UK Business

Step 1: Assess Your Business Needs
Determine:
- How many concurrent calls your business requires
- Whether you need local or international numbers
- If integration with existing phone systems is necessary
Step 2: Select a UK SIP Provider
Compare SIP trunking providers based on:
- Call quality
- Pricing and scalability
- Security features
Step 3: Configure Your PBX System
Set up SIP trunks within your PBX or VoIP platform. Ensure firewall settings allow VoIP traffic for uninterrupted calls.
Step 4: Test and Optimize
Run test calls to evaluate:
- Voice quality
- Call routing functionality
- Failover and backup options
Optimizing QoS (Quality of Service) settings improves call clarity and connection stability.

Frequently Asked Questions

How does SIP trunking save money?

SIP trunking eliminates fixed line rentals and offers lower call rates, reducing monthly telecom expenses.

Can SIP trunks replace traditional phone lines?

Yes. SIP trunking services act as a digital replacement for fixed-line telephony, providing greater flexibility.

Is SIP trunking secure?

Leading providers implement encryption, authentication, and fraud prevention measures to secure VoIP communications.

Can I use SIP trunking for remote work?

Yes. VoIP-enabled SIP services allow employees to make and receive calls from any internet-connected device.