====== LTU chassis ======

{{:rb:ltufront.jpg?230|}} {{:rb:lturear.jpg?200|}}  {{:rb:ltuside2.jpg?150|}}  {{:rb:ltutop.jpg?150|}}

This is a common chassis which provides the usual -50v / 0v telecom power and 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:- \\

{{rb:ltu23-2.jpg?50|}} {{:rb:ltu23-1.jpg?200|}} \\



===== LTU23 C/C =====

{{:rb:ltu23c-1.jpg?50|}} {{rb:ltu23c-2.jpg?200|}} \\



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