[Asterisk-Dev] Patch: So tone generator can do modulated tones

Jim Gottlieb jimmy-ml at nccom.com
Tue Jun 17 14:26:21 MST 2003

On 2003-06-17 at 21:33, Stephen Davies (steve at daviesfam.org) wrote:

> In some countries (.au and .za I know about), dialtone and ringback
> are made with one tone modulated with another.  Like 400Hz modulated
> with 33Hz.

Dialtone in the U.S. is 350Hz and 440Hz, so the capability must be
there already.

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