BT Signalling Unit 101A

From the BT User Instructions….

The unit provides the following ports:-

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



From the manual, this is one way the unit was intended to be used:-

Manual:- sigunit101a.pdf


rb/bt-sigunit101.txt · Last modified: 14/07/2018 22:49 by andrew