LTU chassis

This is a common chassis which provides the usual -50v / 0v telecom power anc can house different LTU.

BT LTU23c

I have two variants of these, both rack mounted in a 3U chassis, both are made by Telspec. I believe in normal use, there would be a two pronged jumper to link vertically, and for testing these could be removed and inserted horizontally to loop back.

As with the other pics I have, I would appreciate any feedback as to where they would have been used and what determines which LTU is used for which purpose.

LTU23 C/A

This one seems to have extra monitoring available and a loopback switch to help testing:-


LTU23 C/C



rb/bt-ltu23.txt · Last modified: 14/07/2018 22:53 by andrew