Thread: GPO Modems
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Old 2nd Oct 2019, 8:16 pm   #14
Granitehill
Tetrode
 
Join Date: Mar 2019
Location: York, North Yorkshire, UK.
Posts: 95
Default Re: GPO Modems

Quote:
Originally Posted by JohnBHanson View Post
I remember a long while ago the GPO supplied (rented?) modems. One was a filing top unit and another was attached to the base of a telephone much like the planset.

Does anyone have any data on there, circuit/connection diagrams etc or even photos. I believe one may have the name datel on it.

technical information would be most welcome?

Many thanks.
I've just found a pile of old PO/BT Educational Pamphlets on the early data services and equipment which covers the era and equipment you are looking at. Notes from a long-forgotten training course, I think, during my PO/BT engineering days. The first is "Introduction to data communications", and the other is "BPO 48Kbits/s Datel service". If you want them, PM your snail mail address and I'll post them off.
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