TELECOM Digest OnLine - Sorted: Re: Touch Tone Blocking

Re: Touch Tone Blocking
Sat, 9 Apr 2005 20:29:33 EDT

Pat wrote:

> [TELECOM Digest Editor's Note: At least on the older Bell
> switchboards, there was a certain contact on the network (inside the
> switchboard) to mute your earpiece from the audio on touch tones while
> still playing them out over the phone. It was generally only done for
> switchboard operators to prevent them having to listen to the tones
> all the time as they placed calls. PAT]

Are you sure that wasn't MF tones rather than Touch-Tone? Operators
ordinarily used MF signaling, not Touch-Tome.

Wes Leatherock

[TELECOM Digest Editor's Note: The *only time* I experienced this was
when I filled in overnight two or three times for the regular switch-
board operator at the 14 East Delaware Apartments in Chicago. A large
building (20 stories, with about 150 apartments), they had a
switchboard for tenants; that was about 1965 or so. Unlike most of
those older high-rise buildings which had switchboards for the
tenants with _rotary dials_ on them, this one had a little box built
in with a touchtone pad. The tenants could hear the touch tones, but
the operator could _not_. I have no idea how they wired it to do that.

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