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Hosted Telephony Gives Your Team the Freedom to Work from Anywhere

Agile, Comprehensive Professional
Hosted Telephony

Communicate with your business and customers seamlessly, wherever they choose to work.

Hosted Telephony

We are entering a new era where businesses need the agility to work and communicate from numerous locations. Hosted telephony (also known as VoIP) solution service enables your business phone service to be delivered via an internet connection. Which means you’re fully connected with your colleagues no matter where you are – even if you’re not physically in the office. 

Suitable for any size business of any size – as long as it has a microphone and speakers your staff can take calls on mobile, PC or laptop, all in single click. And if they miss a call, they can pick up their voicemail, no matter where they are. 

One Voice cloud hosted telephony system

1 Voice


One Voice is a secure, cloud-based phone system which unifies your landline and mobile communications, so you’re always fully connected. By offering a converged service for fixed and mobile phones, Blackbox is able to deliver all of the benefits of this seamless, fully integrated communications service.

Perfect for small and medium sized businesses, you will benefit from an enhanced customer experience – boosting staff productivity, efficiency and morale. Which means you can work better from any of your devices – wherever you are.

Better still, being cloud-based, our hosted business telecom solutions or as previously known, VoIP solutions, ensure your employees can benefit from all the functionalities of an office-based phone system, whether they’re on your premises, working from home or on the move. 

One invoice with a ‘real time’ breakdown of all your telecom costs

Our single invoice covers your entire business communications providing concise and clear billing detail in one place. Our online billing gives you detailed and real time overview of all incoming and outgoing calls.

To address the needs of businesses, we only use tier one carriers to route calls and provide features rich to assist a wide range of needs for multi locations.

Yealink & Cisco


Yealink and Cisco are the two of the top media phone and integrated software providers for hosted telephony in the UK. Both systems come with a range of handsets to choose from and offer the following:

The OneVoice mobile softphone App allows you to use your smartphone to keep in touch with your colleagues, anytime, anywhere.

Callers can be automatically transferred to an extension without the intervention of an operator or receptionist, in a few clicks.

Businesses can record all company calls both internal and external. Both standard and compliant call recording is available.

Hold incoming calls when there are no free operators available. With OneVoice you can create up to 50 call queues and choose different music for different queues. Call Queue reports, can be viewed, downloaded and / or printed.

complete phone system
Microsoft Team hosted phone solutions

Microsoft Teams Integration


Microsoft Teams allows your business to integrate its communications, with the platform being adopted by more and more companies as they move across to Microsoft 365. However, simply moving across to the Teams environment is not as easy as it sounds, due to the lack of support for many current telephony features.

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Voice Integration
For Microsoft Teams

CallSwitch is a powerful solution for voice-enabling Microsoft Teams. It provides the productivity benefits of having all your communication tools conveniently located in one place.

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Utilise Our
Infrastracture Via
Ms Teams

Enjoy the various benefits of the CallSwitch platform, including call routing, intelligent native call recording, CRM integration, generous inclusive call bundles, international numbering and quality UK based support.

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Receive And
Make Voice Calls
From Teams

You can centralise your hosted telephony communications through one application, this VoIP solution leads to greater efficiency and productivity.

3sixty logo

Reach your customers on their
preferred channel

Yealink and Cisco software also integrate seamlessly with Google, social media, and an unrivaled number of other platforms via our 3Sixty product. 3Sixty allows you to meet your customers wherever they are and keep all your interactions in one space, no matter where the conversation was started. Find out just how easy it is to unite all your communications platforms into one convenient location
learn more about 3Sixty today.

FAQs About
Hosted Telephony

Hosted telephony or VoIP uses the internet to send voice data through the local phone exchange. This gives you a telephone system that’s hosted in the cloud, meaning you can use IP handsets, mobiles, or even a desktop application to make and receive calls.

Hosted telephony or as formally known VoIP (Voice over Internet Protocol) works by converting sound waves into digital using packet switching, which allows you to seamlessly use the internet as a method for phone calls.

Accessing and using hosted telephony (VoIP) couldn’t be simpler. All you need is a device such as a computer or smartphone, a Wi-Fi connection, and the software or app installed. From there just use your built-in microphone, or add headset for improved quality, and you are all set.

Yes, you can transfer (port) your existing toll-free or local phone numbers to Blackbox UC.Please note that the porting process takes approximately 2-4 weeks. Also, it is dependent on how quickly your current provider releases the relevant numbers.

NoThere are no setup or activation fees.

Hosted telephony almost always works out to be more affordable than traditional phones. There are several reasons:  

  • Reduce infrastructure costs.  
  • Utilise existing internet connection.  
  • Avoid cost of hardware and desk handsets. 
  • Option to use existing mobile phones to access VoIP. 

No. Phone handsets are optional for hosted telephony users. The alternative is to either make calls through a mobile app or your computer with a headset or inbuilt microphone and speaker.

Yes! Hosted telephony technology is the perfect affordable and scalable solution for call centres. It offers a range of functions, including queuing, call recording, and integration.

Yes, you can. You can make and receive voice calls from within the Microsoft Teams interface there is no need to ‘click out’ into other consoles. CallSwitch for Teams requires no middleware, mitigating the risks of complex implementations and potential points of failure. CallSwitch for Teams includes options for free IP desk phones on selected Business plans. This will allow your customers to continue enjoying a wide range of other hosted features if required.

One of major benefits of a hosted telephony service is that the client does not need to host nor invest in telephone system hardware. All of the telephony hardware and software is hosted by the hosting company’s data centre and calls are routed via an IP link to the telephones on the client’s premises. 

In fact, there is some new hardware required. There is often a replacement of handsets, where legacy telephones are replaced with hosted IP handsets. The client may also require some cabling to support the new handsets. The handsets will require power and it is advisable to use a Power over Ethernet (PoE) switch for all new VoIP phones.  These costs must not be forgotten but with all of our hosted packages all of these costs are included into the monthly per seat price. 

The hosted service includes the routing of calls using. Calls from the handset through cloud hosting are ultimately broken out to the traditional PSTN network to reach its end point.  As the majority of the call is handled using a free or low call transit, then calls out of the hosted network are significantly cheaper than ISDN. Hosted telephony provides a number of routing options for all its outbound calls. Calls to international numbers can be minimised using one of our wholesale providers while local, national and mobile calls are free using another.

You may wish to introduce a new non-geographic number scheme or if you wish to keep your existing numbers, we can do both. We have porting agreements with all the major line providers and the costs are very minimal to take current numbers with you.

Yes. You may have your own Power over Ethernet (PoE) switches or we will supply PoE switch ports which are included as part of the installation.

You will receive our exceptional help desk customer service included in the price.  Our help desk is UK based and our engineers and project managers are all highly trained in hosted cloud telephony solutions.

There are no restrictions! Our service can support connections ranging from two users to 5000 for businesses with small, medium, or corporate, with no limit on the number of users that can be supported for large enterprises and contact centres. 

Unlike onsite telephone systems, hosted has no limits to the number of extensions a client can use. There are no restrictions to a number of users that can be added from any location where a reliable IP connection can be found. Restrictions for the maximum numbers of extensions tend to focus on the available bandwidth a client has to the hosted network. This may be an Internet connection or direct connection. Each user who picks up their desk phone to make a call requires approximately 100Kbps across the network.  Hosted is different from many of the Internet based hosting providers in that we offer both an Internet and Direct connection model.  For those companies who prefer a dedicated line to the hosted network have a number of choices from Ethernet First Mile(EFM), 100Mbps Fibre and FTTC. A dedicated connection ensures that all voice calls are routed to the hosted network without lag or contention.

The hosted application is a softphone which takes away the need for a fixed phone on your desk. This can be a hosted software application, either on your PC/Laptop or on your Mobile phone.  It sits on your Laptop, PC or Mac and you will need a headset plugged into the device to make a good quality telephone call.

There are two ways for users to manage their voicemail messages: The Hosted messaging centre or the Hosted Recording Interface website.

An Interactive Voice Response (IVR) system is like a digital receptionist. They play pre-recorded messages and request the user to select the right path for their query by pressing the relevant number. This will then direct the user to the correct phone or department.

When you sign up for the hosted service we will allocate your at least one inbound local STD number. For example if your address is Manchester you will be offered a number of 0161 numbers to choose from. You can add individual DDI numbers if you require. 

You may want to bring your current STD number. We will look to port the number from your current provider to our SIP service. this can take some time and you need to check you are not in a long term contract with your current line provider. 

You may want to bring a current Non Geographic number and this is easily achieved. You will simply point the Non Geographic number from your provider to the new STD number allocated by VOIPE. You may also want to choose from our range of 08 and 03 numbers.

Phonebook Directory targets do not require setting up any additional configuration beyond initial user setup. The Phonebook Directory allows a caller to search for a user’s extension by dialing the first three letters of their first, last, or first and last name. As long as the user has the Voicemail & Directory option enabled, they will be listed in the directory. 

The user is prompted to enter three letters on their touch tone phone to make a search in the phonebook. When the desired entry is found, the user is given the option to press 1 to dial the number.

Delivering a robust, business-grade telephony service that you can rely on to keep your business running whatever the circumstance is vital. Cloud Hosted connect customers’ sites with our nationwide network provider, so in the event of an outage or move your calls can be re-routed within seconds so you never miss a call! A hosted telephony solution can easily be uplifted and moved to a new location and with a hosted solution it is just plug and play.

We offer a variety of different Yealink and Cisco models, as well as Gigaset cordless phones and Polycom handsets.

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Hear how unified solutions by Blackbox UC have improved productivity and ease of communication for our clients across the UK

Why Blackbox UC?

Business is better with Blackbox UC.


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With our fixed-fee contracts, you can say goodbye to bill shock! No more hidden fees or extra costs – just complete transparency and peace of mind.

and Innovation

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We offer industry-technology to support your business – and we’ll integrate everything to create the most innovative communications solution possible.

Ultimate Flexibility
and Support

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Blackbox UC exists to make your business communication simpler and more efficient. That’s why we offer flexible pricing and outstanding customer service.


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Beyond hosted telephony, we offer a wide range of unified communications services, including business mobilesbroadbandnetwork, and cabling.

Discover the Right Hosted Telecoms Solution for
Your Business

Learn more about our hosted telephony solutions by speaking to the Blackbox UC team.

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