Roque wrote:
Did you mean DTMF (dual tone multi frequency) touch tones? I would assume
they are the same in Mexico as they are in US since the system has been in
use since 1960s. Here is a nice read on the subject:
http://www.fact-index.com/d/du/dual_tone_multi_frequency.html
You could also post in another newsgroup, comp.dcom.telecom.tech to see if
someone from Mexico can actually 100% confirm that.
--
Dmitri Abaimov, RCDD
http://www.cabling-design.com
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