====== BT Signalling Unit 101A ======

From the BT User Instructions....

The unit provides the following ports:- 
  - Line Interface port (2w or 4w)
  - Customer Interface port (2w or 4w, E+M and sig earth out and Signal rail in)
  - Power supply port, my rack was locally powered by the usual -50v and 0v power.

{{:rb:sigunitfront.jpg?300|}}  {{:rb:sigunitside1.jpg?150|}}

{{rb:signallingunit101a-b.jpg?50|}} {{rb:signallingunit101a-a.jpg?200|}} \\

{{rb:signallingunit101a-c.jpg?200|}} {{:rb:sigunit101a-layout.png?200|}} \\


From the manual, this is one way the unit was intended to be used:-
{{:rb:sigunit101a-example.png?200|}}   \\


Manual:- {{ :rb:sigunit101a.pdf |}}