Jay R. Ashworth wrote:
On Sun, Oct 01, 2006 at 02:58:37PM -0700, Lee Howard wrote:
Well, fax detection isn't entirely reliable anyway. Even if you assume
that your fax detection feature and operation is flawless in properly
detecting fax tones (and that most likely would be a specious
assumption), not all calling fax machines send fax tones.
So, y'know, that assertion gets made a lot.
What's the turn rate of fax machines in the market? 3 years? 5? CNG
tones are *well* over 10 years old, no?
What relevance does that have to CNG? It was a feature of the original
spec 30 years ago.
What percentage of fax calls are sent without CNG tones these days?
Quite a lot. A large number of FAX machines have CNG turned off. On many
machines, if select features like sharing a line between FAX and
answering machine CNG, CED and various other useful behaviour might be
disabled.
Steve
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