TELECOM Digest OnLine - Sorted: Touch Tone vs. Rotary -- Desk vs. Wall Sets ?

Touch Tone vs. Rotary -- Desk vs. Wall Sets ?
25 May 2007 10:08:18 -0700

When Touch Tone dialing was introduced, the Bell System came out with
newly designed desk and wall telephone sets to accomodate the

The desk set (dial 500, TT 1500/2500) became fatter and higher to
accomodate the tone pad. However, the wall set (dial 554, TT
1554/2554) became slimmer.

So, I was wondering why the desk set became bigger while the wall set
became smaller to accomodate Touch Tone? Anybody know?

[public replies, please]

P.S. While we're on the subject, would anyone know what percentage of
lines are still served by exclusively dial equipment? I don't think
they charge a premium for TT anymore. Also, many people have some old
rotary sets still in service (like me) even if their primary sets are


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