Siemens TGN1 (Receive only UK Spec "T1000") Interface cards.

[M1ECY]

Hello All,

Sorry, been a bit quiet from the Hitchin Telex Office - Work and other things have interfered with the hobby time far too much over the past year.

I have a dilemma, there are a number of the SIemens TGN telex machines here - a loosely based version of the T1000, but being made for the Royal Navy, to a specification that is not ideal for telex use.

I have the "Line" interface card, and Machine Interface card in pictures below - obviously not single or double current loop Telex design - maybe some kind of serial interface?

There is little to no information available for these machines in the UK can any of the experts here suggest an identification?