the collector is asking "what system was this console used in?" It looks like a modified call director to me, why I put it here I figured Ed would know ?
And it probably still works as well as it did the day it was installed.
Jeff, thanks for the compliment, but Arthur holds the title of 'most knowledgeable' with regard to this stuff. I'd be happy if I could remember half of the things that he's forgotten.
Upon further review, it has 70 DSS keys. The 756 would have 80.
It has no supervisory lamps next to the line keys, so it's not from a PBX.
We think it's a supervisory console for "general service" use. These were used in various central office or business office applications. The big red lamp at the left is a signal that lights when a subordinate needs attention.
It probably had a "5-finger" (125-pair) mounting cord.
Good point...Not sure. Subscriber station Call Directors used that method, but some PBX consoles didn't. It depended upon the number of lamps, etc., in the DSS fields.
Call Directors used one finger per strip of 6 keys, so only 20 pairs were needed in that application, but PBX consoles used more pairs, for features such as the trunk keys, with two supervisory lamps per key.
I'll see if I can dig out some BSP's for PBX consoles and take a look.