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Posted by APB in Frigid NY on Thursday, February 14, 2008 at 12:19:37 :
In Reply to: Re: O T annual appeal - telecom jargon posted by 74w300uteline on Wednesday, February 13, 2008 at 22:57:40 :
C = "combined" set (the first ones that did not have a separate ringer box and voice coil. (the model 302, for instance)
CV = Combined "varistor" The varistor is a variable resitor whose resitance decreases, as voltage across it increases. It is used to limit acoustic shock (clicks in the ear) as the phone is taken off-hook, and during rotary dialing pulses. The varistor is the little resistor-looking thingie wired across the receiver unit in a conventional (G-type) handset.
KV = key telephone, with varistor.