Seriss 1a2 KSU FAQ

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Greg Ercolano

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Jul 23, 2019, 1:50:10 PM7/23/19
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First post!

This forum/group is for users of the Seriss 1A2 Multiline Single Board KSU (Key Systems Unit),
a specialized circuit board project that manages old AT&T "1A2" business phones from the 1950s - 1980's era.

Questions/comments regarding setup, installation and maintenance, and all such issues related to
using and servicing these boards.

Topics can stray into discussions on 1A2 configurations, techniques as long as they somehow related
to these boards.

General 1A2 questions are best answered elsewhere, on forums where AT&T service people hang out, e.g.



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