Reliable SIP Trunking for Your Business
Connect your existing phone system to the world with Xinix SIP Trunking. Our SIP trunks offer high-quality, cost-effective calling for businesses of all sizes. Replace traditional phone lines with a flexible VoIP solution that scales with you – all while slashing your telecom bills by up to 50%.
Unlimited concurrent calls, crystal-clear voice,
and 99.99% uptime guaranteed.
Plans & pricing
Choose a plan that fits your business needs. All VoIP plans include free setup, 24/7 UK-based support, and a mobile & desktop softphone app for each user. (Prices per user, per month, plus VAT, billed annually.)
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shareSIP
No inclusive minutes Perfect for short term projects and testing.
- UK landline 1p/minute
- UK mobile 3p/minute
- Call set-up only 2p/minute
- Call recording £0.002/minute
- Emergency calling
- Keep your existing phone numbers
- Consolidate line usage across multiple sites
- Highly scalable at short notice
- Fully tested with leading manufacturers including: 3CX, Asterisk, Avaya, Cisco, Epygi, IPCortex, Mitel, Panasonic, Patton and more…
share1000
500 Minutes to UK landline and 500 minutes to UK mobile.
- 500 UK landline minutes
- 500 UK mobile minutes
- Call recording £0.002/minute
- Emergency calling
- Keep your existing phone numbers
- Consolidate line usage across multiple sites
- Highly scalable at short notice
- Fully tested with leading manufacturers including: 3CX, Asterisk, Avaya, Cisco, Epygi, IPCortex, Mitel, Panasonic, Patton and more…
share4000
3000 Minutes to UK landline and 1000 minutes to UK mobile.
- 3000 UK landline minutes
- 1000 UK mobile minutes
- Call recording £0.002/minute
- Emergency calling
- Keep your existing phone numbers
- Consolidate line usage across multiple sites
- Highly scalable at short notice
- Fully tested with leading manufacturers including: 3CX, Asterisk, Avaya, Cisco, Epygi, IPCortex, Mitel, Panasonic, Patton and more…
All prices exclude VAT. Volume discounts apply for multi-year terms. Number porting of your existing lines to SIP is free. Out-of-bundle calls (if not on unlimited) are billed per minute at competitive rates.
Meet our happy clients
Join the ranks of satisfied customers
Expand your system as needed
Add add-ons in the checkout.
Give us a call today:
Additional vanity numbers
£30 one-time fee
£4.99 Set up fee*
Additional international toll-free numbers
£14.99/user/month
£25 one-time fee
Additional international numbers
Starting at £5.99/user/month**
Add a Xinix rooms license
£49/room/month
or £468 annually (20% savings)
Call for a free consultation from our home VoIP virtual landline specialist.
03333 055 888
Anytime between 9:00AM – 5:30PM
Monday to Friday
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SIP trunk feature highlights
Concurrent call control
Choose exactly how many simultaneous calls you need. Our trunks aren’t limited by channels unless you set them – one trunk account can handle hundreds of concurrent calls if your bandwidth allows.
Codec support
Supports G.711 for maximum voice quality, as well as G.729 and other codecs if you need to save bandwidth. You have full control over codec priority.
Emergency calling
All Xinix SIP trunks support 999/112 emergency calls. We’ll register your company address so emergency services can locate you. This ensures compliance and safety for your users.
Integration with MS teams
Already using Microsoft Teams? We offer Direct Routing integration – connect Teams to the PSTN via our SIP trunks. No Microsoft calling plan needed, saving you money and unifying your communications.
Fax over IP & DTMF
T.38 fax protocol supported for reliable fax transmission over SIP. Out-of-band DTMF (RFC2833) ensures your phone menu selections (IVR inputs) are sent correctly on calls.
Global reach
If your business expands, we can provide local SIP termination in over 50 countries. Serve your international offices with the same platform – one provider for all your voice traffic.
Why Xinix SIP trunks?
Superior call quality
Our SIP trunks leverage tier-1 carriers and intelligent routing to ensure your calls sound great. We support wideband audio (HD Voice) when used with compatible systems, so calls are clearer than traditional PSTN.
Massive cost savings
Only pay for the capacity and calls you use. Consolidate multiple ISDN or analog lines into a single IP connection. No more expensive ISDN30 rentals or per-line rentals – many clients cut costs by 30-50%.
Scalable & flexible
Need to add 10 new phone lines for a campaign? Or scale down during off-peak seasons? With SIP, it’s instant. Scale your channels up or down month-to-month. You’re not stuck with fixed physical lines.
Keep your numbers
Easily port all your existing phone numbers to Xinix. We handle the porting process end-to-end. You can also acquire new numbers through us in any UK area code, or even international numbers, to give your business a wider reach.
Built for reliability
We know phone service is mission-critical. That’s why our SIP platform has redundant servers and network paths. In case of any outage, calls automatically reroute. Our uptime last year was 99.99%.
Easy management
Use our web portal to monitor usage, manage routing, and view live call status. Set spending limits, get email alerts for unusual call activity (fraud protection), and configure failover rules – all in one place.
Business SIP trunking
Business SIP trunking is a service that enables your company to operate a selection of telecommunications systems over your IP network. From cheaper international call costs to improved business flexibility, the benefits you get with Sip Trunks is endless. Incorporating a Disaster Recovery strategy to give access to an increased quantity of numbers, Business SIP trunking from Xinix can enhance the way your business stays connected.
Our business SIP trunks represent the latest in telecommunications technology. They are a more affordable alternative to ISDN30 line rental and internet services. While retaining a level of performance that is high in flexibility, it can be tailored to your own specific needs.
Visit our information page on — What is Onsite PBX?
We are a vastly experienced SIP provider in UK. Our knowledgeable engineers have the expertise needed to help you with all your SIP Trunk needs, including any questions you might have in the first instance.
- We operate our own core network infrastructure to support SIP trunk services.
- We can provide telephone numbers from areas throughout the UK, routing them through to a single office location.
- We deliver compatibility with a wide range of SIP devices from a number of manufacturers.
- We supply a full array of components to connect your system via SIP trunks, taking responsibility for delivering your service from the day you order.
In addition, we provide a managed service to cover IP connectivity and number management, ensuring that business SIP trunks from Xinix deliver a complete communications solution.
Ready to modernize your small business phone system?
It’s time to upgrade to a phone system that grows with you. Ditch the old PBX and enjoy the flexibility of VoIP.
Ready to get started? Try Xinix risk-free for 30 days or contact our team for a personalized demo and quote.
The benefits of Xinix Switch
- Control all your inbound calls and outbound call costs
- Cheaper alternative to ISDN30e solutions
- ISDN replacement – save up to 50% on line rental and up to 60% on calls.
- Inclusive calls to 01,02, 03 and all major UK mobile networks
- Guaranteed call quality
- Retain your existing telephone numbers
- Perfect for all Disaster Recovery requirements
- Easy management via an app and web portal.
Telephony downtime can damage both the finances and reputation of your business. With Session Initiation Protocol (SIP), there is a Disaster Recovery strategy ready to support you in worst case scenarios.
The first level of resilience in SIP trunking Disaster Recovery is the ability to reroute calls to a backup IP address and/or location. The second level is the ability to divert calls to backup ISDN30e or local telephone numbers on a Direct Dial In (DDI) to DDI basis. With such means of resilience available, there is absolutely no reason for users to be worried about anything when all is being taken care of.
You can discuss your Disaster Recovery options with our experts today. They will be happy to talk you through the full selection of available services.
One of the main advantages of choosing Business SIP trunking from Xinix lies in the ability to have numbers from the dialing codes you want to be delivered directly to your office, regardless of location. The ability to centralise numbers from such diverse places as London, Manchester, Birmingham, and Glasgow to a single hub ensures that establishing a nationwide presence for your company is simple. Just specify the dialing codes you desire, and leave us to do the rest.
We make sure that the quality isn’t compromised in any way. Each IP data packet arrives in the correct order and without delay, one after the other. Thanks to SIP trunking services from Xinix, this steady stream of delivery means that packet loss, time delays, and interruptions in delivery are never experienced. But, the question is how do we achieve this?
If you’ve ever experienced delays or problems in communication over IP, the most common issue stems from your internet service provider being unable to guarantee that your data will be forwarded onto your ITSP without delays. Instead, it’s often the case that your data will pass through some networks before finally reaching your ITSP, with a corresponding deterioration in quality.
With Xinix, we ensure that there are no such issues. As a provider of multiple services needed for successful communication, there is no delay or any glitches experienced in quality. Our SIP trunking services guarantee the same ISDN30e call quality, along with the ease and value for money to keep your business at the forefront.
Frequently asked questions
Yes, absolutely. We provide free number porting. You can transfer your current landline number to Xinix and continue using it with our VoIP service, with no downtime during the switchover.
No long-term commitments are required. All plans are offered on flexible terms. You can choose monthly rolling, or opt for annual billing to lock in the best rate. We believe in earning your business with quality service, not binding contracts.
All you need is a stable internet connection. Our service works with IP desk phones, or you can use our free softphone apps on your PC and mobile. If you have traditional phones, an inexpensive VoIP adapter can convert them for VoIP use.
In the rare event of an internet outage, our system can automatically failover incoming calls to a backup mobile or landline number of your choice. This way you won’t miss important calls. Additionally, voicemails will still be captured and emailed to you.
Yes. Our plans are scalable. You can add or remove users/extensions at any time and upgrade plans as your needs grow. Features are modular – for instance, you can start with Basic and later move up to Pro or Enterprise easily via the admin portal.
Get in touch
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(406) 555-0120
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192 Griffin Street, Gilbert, AZ 32521
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