Facilitating AT commands to test modem

Information: MODEM TIPS AND HELPFUL HINTS

AT&V = View modem string
ATI3 = Identify modem
AT+FClass=? = tells the class of the Fax\Modem

0=DATA
1=CLASS 1 fax (use software for hand shake)
2=CLASS 2 fax(use hardware for hand shake)
8=(Voice ?)

AT+FmFr? = Will determine manufacturer information (note: command, only applies to class 2 modem)

Other helpful commands

ATDT = attention dial tone
ATH1 = attention pickup handset (you should hear a dial tone)
ATH0 = attention hang up
ATM1L3 = m is for speaker, l is for volume

Echo ATDT > Com1= Use this command to test the modem in a DOS environment. Modem should respond with a dial tone or a communication signal, i.e. click sound.

ATI1 through ATI9 equal various other commands experiment to discover how these can be used for troubleshooting.

Remember you can find more of these commands at the back of the Infinia handbook appendix B (page 132-148)
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