How to set a voice modem to detect "NO ANSWER"?

[islouis]

Dear Sir:

I have tried many method with AT command to set a voice modem to detect a real "NO Answer" if the target phone didnt pick up. such as:

ATS7=20;
ATD 1234567;

However, no matter if i pick up the call in the target phone or not, the modem always return "NO ANSWER" So my question is, is there any possible way to set the modem if remote phone has pick up the call, the modem will not return NO ANSWER? and return "NO ANSWER" if didnt pick up?

Thanks for any advice!!!

 

[isuranja]

Re: How to set a voice modem to detect "NO ANSWER"

Hi,
I think your modem is connected through srerial port, then there is several pins in com port for several functions.Eg -

DTR= dataset ready( that pin send a signal for indicate data set is ready now)
RI = ring indicator ( when modem is ringing a signal is send though this pin)
CTS =Clear to send
RTS=Reday to send
(Sory I am not remember that all exactly right now)
So my adviceis follow the serial port configaration and you can find some fact regarding this.If you unable to find out let me know, I will find for you.

Regards,
I Suranja