Pulse to Tone Converter for VOIP services e.g. BT Digital Voice, Virgin Media, Sky - 'Dial-A-Tone'


We are proud to offer our top-quality pulse to tone converter, designed to return vintage dial telephones to full functionality on VOIP lines such as BT Digital Voice, Virgin Media, Sky etc. and standalone analogue telephone adapters (ATAs).

Designed by Geoff Peters exclusively for us, this is a modified, improved and enhanced version of his original concept. It is a line powered unit which will operate almost invisibly with no loud beeps, no pausing between digits and no special dialling technique required. There is also, by intention, no 'last number redial', no 'stored numbers' no 'star' or 'hash' - nothing to interfere with the authentic vintage experience of using a period telephone.

It is technically far in advance of anything else on the market. It is capable of coping with a wide range of dial speeds (dial speeds far outside GPO specifications) and is the least intrusive device available. No modifications are required, so no damage is done to the authenticity or value of the telephone.

Unlike other products, the Dial-A-Tone is designed to cater to the UK market and, as standard, is fitted with a BT socket (603A). RJ11 versions are also available - please message us for further details.

Please note: The Dial-A-Tone is designed to be plugged into the router or a BT adaptor. Existing wall telephone sockets will be inoperative and would need to be wired into the back of the router. We can advise any Dial-A-Tone purchaser how this may be done.

The Dial-A-Tone is designed as a 'fit and forget' device, however, for the more technically minded our device ….

- Is constructed from components from leading suppliers - we do not use ‘fake’ or ‘counterfeit’ components. The processor is a genuine ‘Microchip Technology’ PIC.

- Is housed in a genuine Hammond enclosure which we customise in-house.

- Is supplied with a built-in ‘full value’ ring capacitor which will resolve ringing issues that some routers exhibit.

- Can be used to run multiple telephones and can be wired to existing telephone extensions.

- Can be supplied with RJ11 and 431a (socket and plug) variants.

- Can be supplied as a ‘New Zealand’ version for dialling with ‘reversed’ numbering.

- Can be used with most push button decadic key pads such as those used on 706s. Faulting may occur if keypads draw excessive current, although this is a rare occurrence.

- Will cope with a wide range of dial speeds and make/break ratios.

Please Note: If you experience faulting on some numbers the make/break ratio on your dial will be very badly out of specification – around 80/20 or worse. We offer a full dial restoration service which will protect the life of the dial and resolve any such issues.

*** We will ship internationally. Please message us for pricing. ***

And a little further background ...

Without an elegant solution to allow dial telephones to run on the new VOIP system we were aware that this heritage would be lost – very much as the interest in vintage radios has wained with the loss of analogue broadcasting stations. We were unhappy with aspects of existing products, so we put out the call for someone we could work with to develop a product in keeping with our ethos and product range.

As a result, we were lucky enough to connect with Geoff Peters, a telecoms expert who has worked with leading telecom providers. He has been a dream to collaborate with, and together we have adopted a ‘belt and braces’ approach to designing the optimum pulse to tone converter. As a result, the DAT is more resilient and compatible than anything else available. The small size has been achieved by utilising surface mount technology for passive components with the remaining assembly hand built by ourselves. We thoroughly test each individual device and offer technical support and advice.

There is more information about BT Digital Voice on Bob Freshwater's website - a mine of historical telecoms information: