Telephone Systems

Top Brands, Top Performance, Affordable Prices.

Direct ISDN Replacement –  VoIP Telephone Systems

Choosing the right small business telephone system is very important. Along with your IT systems, a good business telephone system is essential. As a telephone service provider we offer wide a range of VoIP telephone systems including fully hosted cloud based systems & SIP trunks. Both are direct replacements for older ISDN based systems that will soon be obsolete. Click here for more information on the BT ISDN switch off.

We handle the whole migration from start to finish and provide a smooth, trouble free service. All business telephone numbers can kept and migrated to the new system with ease. Functional, reliable and robust, our VoIP range has something for everyone.

Polycom VVX411 VoIP Phones

Our most popular phone the Polycom VVX 411 has over 1000 features! Some of the main ones are POE, Gigabit Ethernet, 3.5″ Colour Display, 12 lines, 12 Speed Dial Keys, HD Voice, Hold, Transfer, Headset / Headphones / Loud Speaker, Mute, Caller Display, Conference Calling, Call Log, Call Recording, Remote Office and Voicemail.


Self Managed VoIP Portal

Our VoIP phone systems offer complete communications service for your business that provides an extensive range of fixed and mobile telephony capabilities via an easy-to-use web portal. The service allows you, the administrator, to easily manage your environment whilst enabling your employees to maximise their productivity. Don’t fancy the hassle? OK, leave it to us and we will manage it for free!

Flexible and Scalable VoIP Telephone Systems

Voice Over IP (VoIP) telephones systems have now been accepted as a direct replacement for traditional telephone systems (ISDN & PSTN) and have moved one step closer to business computer systems. By using your computer network, handsets are  simple to install and only need an internet connection to spring into life.

Handsets can also so be in various locations such as a teleworkers house, a remote warehouse or in fact on mobile in the airport.  So now you can be in the office wherever you are!

Advantages at a glance:

  • Direct Replacement for the older ISDN & PSTN lines.
  • No upfront costs.
  • Hugely competitive call costs compare with older systems.
  • Flexible contract lengths.
  • Your existing telephone numbers can be adopted easily.
  • Grow or shrink with your needs.

So whats the catch?
We are glad to say there is no a catch. Technology, as it does with everything has made something that was quite complicated and expensive into something simple and cost effective. Its that simple.

The ISDN & PSTN switch off, relax we have it covered –

The shutdown of the current telephone network has started.

BT will stop selling traditional telephone lines (ISDN2E,  ISDN30 & Land Lines) by 2020 and switch off the the ‘old’ telephone infrastructure by 2025. Having said that, the shutdown has technically began as company after company moves to VoIP and cuts of there old lines.

We are experts at migrating companies to VoIP and have been providing this for years.  Our quickest migration took just 5 working hours for a 15 user system, amazing!


Shared Resources

Lower Costs

Easy Expansion

Call Tracking

SBS IT Support and Telecoms

We have a great reputation for our service and support. Check out the customer feedback

“I can truthfully say that Sheffield Business Systems have been nothing less than fantastic. We are 100% happy with the service that they provided and would not hesitate to recommend Phil and his team. Excellent service.”

Do you have any questions? Give us a call on: 0114 358 3214