Talk:Limited availability

This page is discussing a historical feature, although it can still be effectively true of concentrators. I think some of this information is valuable. However, it needs to be rewritten "so your grandma could understand it" (assuming that she's not a teleco engineer). As it stands it is not going to be very usable, please consider rewriting it a bit.

A more clear diagram treating it all as a subscriber switch with a concentrator followed by two layers of switching matrix and showing the calls connected all the way through the matrix would help. You could then show a call being blocked even though capacity exists elsewhere in the exchange. Mozzerati 16:24, 2005 Apr 9 (UTC)

Figure 1
This article references Figure 1, but no figure is present. -KI4IHC - too lazy to login

I agree, I am, in addition to being somebody's grandad, educated to degree level and this was completely over my head.

Theoldman66 20:47, 27 September 2007 (UTC)

Grading Scheme?
Why did "Grading Scheme" redirect here?

Qwertyxp2000 (talk) 02:20, 21 July 2014 (UTC)


 * The present article is presented from a crosspoint switch point of view, which is appropriate to the late 20th century especially in North America. The term "grading" was more used in selector switch bank working, as briefly alluded to in Telephone Tribute Alas, I haven't the patience to work up an introductory description of a theory that I, as a crossbar mechanic, studied a little but didn't actually use. Jim.henderson (talk) 23:19, 22 July 2014 (UTC)