🚀 go-pugleaf

I have what looks like a linear board (given the voltages)  which 
I'd like some help identifying, and which someone who wants it is 
welcome to if of any use.

It's  about  8" x 4" and has 4 power transistors and 4  pairs  on 
black  and white  things labelled 8712 (white) and 8620  (black). 
The  white ones are made by PED 48vdc and are BT/47/8, The  black 
ones are made by ITT.

There seem to be 4 coils and some other things rated at 24V DC

The board is green with yellow numbering, with a plug at one end, 
and  pull bar at the other, so it's clearly rack  mounted.  There 
are  4  little cards at one end, with two black  bobbles  in  the 
centre of each.

The rest of the components are resistors and capacitors.

Codes on the board are:

3513 446 47240
SA/SAW205590
ASU 1A1/SA28559   122896

two stickers: One says use by Mar 96
             other says BTNLD DRC 121 LG32
                        DOCKET NO  72995-091
                        tested OK PW


I  *suspect* it is some bit of BT telephone equipment, but  would 
like to know for sure if anyone can help....

Please e-mail only as it's unlikely to interest anyone else.
-- 
David Longley