ISP Information:
Pronounced "ass-kee." This is a standard means of representing characters, consisting of 256 characters. The first 128 characters are standardized, and the first 32 of those are control codes, which don't really represent visible characters but rather codes that can be used for text formatting or actions, such as making the computer beep or clearing the screen. After the 32 control codes, the next 96 standardized charact
ISP Glossary:
ASCII - Wesrock@aol.com wrote It was not just in the waning days of SxS. The Los Angeles metropolitan area grew up mostly as a collection of small SxS offices which grew to very large SxS offices and as early as the late 1920s or early 1930s Pacific Bell, almost out of necessity put senders on many, eventually probably all, SxS offices.Would anyone know more about the history of Los Angeles metro telecom?I often wondered how they built that city's network out of SxS _and_independents when most other big cities had panel and #1 xbar, both ofwhich were designed to be used in high volume calling patterns. I'mespecially curious about the 1940s and 1950s when the L.A. regionquite a bit with aircraft construction during the war and Californiamigration after the war. What functions did SxS senders provide?The Bell Labs records of the early 1970s discuss electronic front andback ends for SxS offices to extend their life and improve efficiency.A simple one was a touchtone converter. As I recall, those were of Pac Bell design because Bell Labs and Western Electric really considered SxS a small-town sideshow.It certainly does seem that way, but IIRC (from the Bell Labshistories) that SxS was actually the biggest switch method the 2BellSystem had, and didn't peak until _1974_.Common control systems were quite costly and not justified until therewas a high minimum of lines and calling volume. Indeed, until newtechnologies came along in the 1960s, SxS or manual remained thechoice for small PBXs. The newest technologies allowed first crossbarthen ESS to _economically_ serve small size exchanges, both PBX andcentral office. Remember, just because a new switch was invented, ittook years for it to be built and fully distributed to appropriateusers in the marketplace, so older systems hung around for a longtime.Note that while the first real production ESS came out by 1970, theykept on installing more SxS lines until the peak in 1974.I'm curious when Western Electric built its last new Strowger switchunit. Obviously at some point converted offices provided theremainder of switches needed for expansion or replacement.
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