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Thursday, June 16, 1966 — There will be a different sound to the telephone dial tone in Las Vegas Friday, L.G. Eubanks, manager here for Mountain States Telephone, announced today. The tone will be changed to a lower pitch and is necessary for the inauguration of touchtone dialing. Beginning with touch-tone service all Las Vegas customers using this new telephone must use all seven digits of the telephone number they are calling.

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