Cadence/Tone Telephone in Mexico?

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:

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

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Thanks but it is not exactly the information than I looking for. I'm looking for solved questions which, frecuency of dial tone, busy tone (ex. tuu-tuu-tuu)...

Roque