ISDN/SIP Trunking

Seamlessly integrate your communication technology for flexible working. Empowering your team to work effectively in real-time no matter how they choose to communicate.

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Unified communications for business

Take control of your communication systems with unified communications solutions from Yappl.

As technology propels forward, there are more ways than ever to communicate with colleagues and customers. Unified communications integrate phone and messaging services into one manageable system for simple communication across the business.

We offer a wide range of unified communication tools that can be tailored to your business needs to support your employees on a daily basis.


Benefits of unified communications

Remove communication bottlenecks with flexible unified phone, messaging and video conferencing solutions.

Future proof your business to improve communications and collaboration in real-time. An integrated system offers a cost-effective and scalable solution to the new direction of hybrid working, giving all employees access to the systems they need, no matter where they’re working from.

Plus, the easy-to-use user interface allows for simple management of customer contact for seamless customer service across all channels.

Our unified communications solutions


Set your business up for success with a simple to use unified communications platform, accessible anywhere, anytime, and on any device.


The cloud based CallSwitch software offers a customisable range of advanced call functionalities to make communication across the business seamless, efficient and effective.

Remote working


Effective communication requires the right hardware, like phones and headsets. We offer a wide range of phone system hardware to meet your needs.

Business IT services

SIP Trunking

A scalable and cost-effective alternative to ISDN.

As ISDN is phased out over the next few years, switching to IP-based telecoms is crucial. SIP Trunking can be an ideal option for many different businesses, perhaps including yours.

Instead of switching to a full cloud-based telephony system, SIP (Session Initiation Protocol) can be the perfect solution for businesses with high call-volumes, where flexibility and cost-effectiveness are key.

SIP Trunks can form a crucial part of your business’ unified communications, offering quick set up, scalability, and flexibility for geographic telephone numbers.

There’s peace of mind too. Because SIP uses your internet connection, which often comes with better SLAs and built-in redundancy, it can provide greater reliability than ISDN.

As with all Yappl services, the best bet is to discuss your day-to-day business requirements with us. Then we can understand and advise on the best options for your business communications.

Why choose Yappl for unified communications?

At Yappl, we’re solutions focused. We take time to understand your organisation and business process to offer a unified communications solution that keeps you better connected.


Our solutions are competitive and designed around your business needs.


Our service teams and account managers are always on hand to advise and support.


We are easily contactable and highly responsive to resolve your issues quickly and efficiently.


We’re one of the UK’s leading independent providers of voice, connectivity, mobile, phone system and cloud services.

Unified communications FAQs

Is hosted telephony right for your business?


For businesses with multiple users, perhaps across different sites and working remotely, it’s the ideal solution. Especially if you’re looking to reduce the cost of communications and increase productivity.
You’ll also gain greater control, with everything managed from a single interface, right down to individual user level.
For growing businesses adopting modern and flexible ways of working, it’s a no-brainer.

How do I know what kind of system we have now?


This information may be on billing/invoices from your current telephone provider. If you can’t find the details, we’ll be able to tell from the name and model of your desk phone.

What is ISDN and why should we switch?


ISDN uses physical telephone lines installed at your premises, connected to a telephone system and allowing you to make and receive calls.
It’s ageing technology, and there are now more advanced, flexible and cost-effective options that can futureproof your telephony setup.
This is important because BT has already put a plan in place to terminate the ISDN network by 2025. Although this seems a long time in the future, by switching to newer technology now you’re likely to save money.
As well as taking advantage of the features VoIP has to offer, your business will be better prepared, and have one less thing to worry about.

How does the audio and call quality compare?


Using hosted telephony, audio and video are transmitted digitally, and comparable to ISDN lines in terms of quality.
The key factor affecting this is your network bandwidth – and that’s where a good business broadband package or leased line comes in.
With Yappl HT, “on-net” calls are delivered with a high-definition (HD) codec.

Will we lose our existing numbers?


We can transfer and keep all your existing phone numbers. Even better, on a hosted platform you’re no longer restricted by physical location.
This means wherever your people are, their phone can present a local number of your choice.

How long does it take to switch systems?


We manage this with you and your IT team or partners to ensure a smooth changeover.
Configuration and setup are usually carried out before arrival on site. Then we can set up the hardware alongside your current system. This limits downtime to a matter of minutes while the number port is completed.

What kind of savings can we expect?


This is dependent on the number of users and your requirements.

How are faults managed on Yappl?


You report all faults to our in-house support team either via email or phone.
We’ll then take the necessary steps to fix the fault within our SLA.

What is the service-level agreement (SLA) on Yappl?


This is one of the main reasons to consider our hosted telephony solutions.
Our platform is extremely reliable. So much so, there have only been 27 minutes of network-level downtime in the last 10 years. This is made even more remarkable considering there are over 60,000 seats using it.
In the unlikely event of a fault specific to your site, our target response time is 1 hour, and resolution time is 6 hours.
Our system also has a built-in failover plan, should any kind of outage occur.

What’s good about Yappl?


Yappl uses one of the most reliable and stable hosted telephony platforms available.
Not only is it feature-rich, but because it’s our own solution, we can configure it to exactly suit your business needs. You’ll never be packed off to anyone else for support because we have our own in-house engineering and support team.
Plus, we manage everything for you – meaning your life is easier and less stressful!

Is it possible to have a trial of the products?


Sure, we’re able to provide trial licence(s) and desk phone(s), set up for you to make and receive some test calls.

Call on 01773 522300 or fill in the form below to get in touch

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