>>Yes. Until your modem sees and negotiates with another modem, it appears to be staying in command mode so you should be able send digits until the modem reaches it's dialing timeout. Having fun yet?
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>I can't send anything to be recorded. The only difference is that when I hang up, the voice mail recognize the end of call and record an empty message. But, whatever I send is ignored.

Meaning? You should be able to control your voicemail system with the modem just like you would through a standard phone. Touch tone is touch tone. Just a matter of having the modem in a proper mode and somehow guessing where you are in the sequence. Without more details, I can't help much here.