I've come across this adapter in my junk box...
http://www.irrelevant.com/rob/adapter.jpg (37Kb)
It's a 5 pin DIN socket, to an RJ11 + lead with a single large pin with a
slot in it.
I /think/ it was for a Wyse AT computer to allow the use of a standard PC
AT Keyboard, but don't quote me on that.
There is a part number on the moulding of the DIN - 940398-02 REV. A - but
googling shows nothing.
If anybody wants it, it's theirs for free; just cover the postage.
Talking of Wyse ... I have two Wyse 120 terminals, a Wyse 30+, and another
serial terminal I can't remember the brand of - (not a major one, and has
reseller's name on the front) - all free to anybody who wants to come
collect from Salford, UK.
Rob