SIP trunks can be cheaper than traditional telephone lines, as they use the internet to transmit voice and data, eliminating the need for separate voice and data connections. With one connection carrying both, there is no separate ISDN line rental to maintain and no paying for physical channels that sit unused.
What Are SIP Trunks?
SIP Trunking is a VOIP service based on SIP (Session Initiation Protocol). It is a means to connect IP enabled PBX’s to the outside world using an internet connection. It does not require traditional ISDN or analogue telephone lines to route inbound or outbound phone calls.
With the final switch off date for the public switched telephone network (PTSN) set for January 2027, SIP trunking is replacing all traditional ISDN lines.
Revolutionise Contact with AI
Many businesses pay for call recording, whether by choice or by necessity - but few truly use it to its full potential. Traditional systems make it hard to manage and monitor 100% of team interactions. Reviewing audio files is time-consuming, and insights are limited. TruSIP changes that.
With our AI integration, calls recorded at the SIP Trunk are automatically transcribed - giving you complete visibility into every interaction. Go beyond recordings. Analyse topics, action items, and call sentiment at scale
Benefits of SIP Trunks
SIP trunking replaces ISDN and analogue lines with a connection that runs over the internet, so voice travels the same route as the rest of a business’s data. For most customers that means lower call costs, capacity that can be changed as the business changes, and a phone system that keeps working even when a site does not.
These are the benefits resellers tend to lead with:
SIP trunks can be easily scaled up or down to meet the needs of a business, as they allow for the creation of virtual phone lines on demand. Channels can be added when a customer takes on staff or hits a seasonal peak, then taken away again afterwards — with no engineer visit and no new physical lines to install.
With SIP trunks, inbound and outbound calls can be automatically rerouted in the event of a network failure, reducing the risk of dropped calls and improving reliability. Calls can be diverted to another site, a mobile or a voicemail box automatically, so a problem in one place does not stop the business answering the phone.
SIP trunks can be used with a variety of phone systems, including IP-PBXs (Internet Protocol private branch exchanges), hosted PBXs, and cloud-based phone systems. That means a customer can usually keep the phone system they already have when they move across, and the same trunk can follow them if they change platform later.
SIP trunks can provide advanced features such as caller ID, call forwarding, and call waiting. Call queueing, IVR menus, recording and reporting are all managed from the same portal, rather than bolted on as separate products from separate suppliers.
With SIP trunks, you can ensure that your business phone system is always on, even if your office is temporarily closed, allowing you to continue to receive and make calls remotely. Numbers are not tied to a building, so staff can answer from home, another site or a mobile without the caller noticing any difference.
Cost-Effective International Calling
You can use SIP trunks to make international calls at a much lower cost than traditional telephone lines. Because the call is carried over the internet to the destination network, distance has far less bearing on what it costs.
Because the call already passes through the trunk, it can be transcribed, analysed and summarised automatically — no extra hardware and nothing for the customer to install. Sentiment scoring and written call summaries turn everyday conversations into something a manager can act on, without anyone listening back to full recordings.
SIP Trunk Features
Everything below is managed from the TruSIP secure online portal.
Call Queueing
Optimises customer experience, efficiently managing incoming calls, reducing wait times, and enhancing overall call flow.
Call History and Recording
Efficient tracking, analysis, and storage of interactions, fostering improved customer service and compliance.
Statistics and Reporting
Provide valuable insights into call metrics, facilitating data-driven decision-making and optimising communication strategies.
Advanced Wallboard
Real-time call metrics, enhancing performance monitoring and overall communication management.
Fraud Management
Safeguards networks with robust security measures, detecting suspicious activities, and preventing unauthorized access.
Number Manager
Simplifies number allocation, streamlining management of inbound calls, routing, and enhancing telecommunication efficiency.
Artificial Intelligence
AI Intelligent SIP Trunks analyse calls using trunk-side recordings, automatically converting conversations into full, searchable transcriptions. This gives your business a detailed written record of every interaction, making it easier to review conversations, locate specific information and understand what was discussed without having to listen to entire recordings manually. Calls can also be assessed using sentiment analysis to help identify customer mood, tone and overall outcome, providing a clearer view of how conversations are progressing and how customers are responding.
By combining call recording, transcription and AI-powered analysis, you can gain greater insight into every conversation across your business. Use AI-powered call intelligence to highlight positive and negative interactions, identify recurring themes, recognise common questions or concerns and spot opportunities to improve the customer experience. This can help managers and teams review performance more efficiently, support coaching and training, and maintain consistent service standards across every customer touchpoint.
The technology can also help businesses understand broader communication trends over time. Analyse patterns across multiple calls to identify changes in customer sentiment, recurring service issues or areas where processes may need to be improved. Instead of relying on occasional manual reviews or individual feedback, teams can use structured insights from real conversations to make more informed decisions and respond more effectively to customer needs.
Built On Our Own Network
Built to Adapt
The TruSIP national network is fundamental to everything we do, providing the resilient and scalable infrastructure behind our communications services.
Built with reliability, performance and flexibility at its core, our network has been designed to support everything from everyday business communications through to mission-critical voice and data applications.
Redundant Multi-Homed Locations
The network is multi-homed across multiple points-of-presence. At each PoP we have self-healing measures in place to ensure resilience at all times.
TruSIP services are spread across geographically redundant locations, with each node capable of functioning independently if necessary. This approach enables us to achieve a high level of availability for our products, typically exceeding 99.999%.
Automatic Failover Routing
Our network includes various options for routing calls, which are activated automatically in the event of a primary route failure.
From UCaaS and converged communications through to dedicated voice, SIP and data services, the TruSIP network provides a flexible foundation that can adapt as requirements evolve and businesses grow.
Artificial Intelligence
Our system doesn’t just record — it interprets.
Every call carried on a TruSIP trunk can be transcribed, analysed and summarised automatically.
Transcription & Analytics
- Every call recorded at the SIP trunk is transcribed automatically
- Topics, action items and sentiment analysed at scale
- Full call history in an intuitive management portal
Sentiment & Summaries
- Instantly see the mood of a call — negative, neutral or positive
- Every call summarised: overview, topics, action items and caller details
- Full transcription with a playback bar for audio review
Included with Every SIP Trunk…
Bundled Minutes
5000 UK landline and mobile minutes included, or a pay as you go option instead.
No Set-Up Fees
No trunk set up fees, and no contractual volumes to commit to.
Encrypted Call Recording
1, 2 and 7 year storage options available. Searchable and playback using our secure online portal.
PCI Compliance
Pause and resume call recording so customer credit card details stay out of your recordings.
Fraud Management
Fraud monitoring on every trunk, backed by protection cover.
Free Partner Branding
Sell the service under your own brand at no extra cost.
Ready to get started?
Talk to our team about adding TruSIP SIP Trunks to your portfolio.