The other night my wife and I watched the 1993 Michael Douglas movie about a nut case wondering around Los Angeles, "Falling Down."
At least twice the character used touch tone pay stations where we could distinctly hear the tones being converted into dial pulse, and it was loud. By 1993, I suspect touch-tone on the front end of an SXS office was pretty much gone from the Los Angeles area. But, the techno-geeks on the movie must have had not-so-fond memories of that bogus tone dialing, so decided to make a statement in the movie to at least the phone phreaks out there.
Most of the movie was located in Pacific Bell territory although the concluding scene was in General Telephone territory.
I know that GTE added tone dialing to the front end of all their SXS offices in the early 1970s, and they were 100% SXS until perhaps the early 1980s.
The Bell part of Los Angeles was also all SXS until after WWII (it never had panel offices). But, after WWII Pacific Telephone (Bell) augmented their metro offices with a lot of expansion 5XBAR, to provide a common control tandem for the vast amount of SXS. I know that AT&T directed the BOCs to add touch-tone to all of the 5XBARs during the mid-1960s, or so, because the 5XBAR would post the tones as fast as a 1ESS (i.e., none of that long wait with DP ratcheting as GTE had and the movie had).
Does anyone know whether the BOCs added tone dialing to the front end of any of their SXS offices? Or, did they limit it to 5XBARs?