How to know the gsm modem is working ?????

amish ghadiya said:

hi friends..
i m using gsm modem (sim900) and its not taking my commands i entered through the hyperterminal..
how to test wheather my Gsm modem is working correctly.????
i think there is no problem with my serial communication..
bcz i also done loopback testing..its working correctly...also my gsm responces to the my calls and messages(it prints RING on hypterminal) but only problem is its not taking the commands i entered...plz help me..
THANKS & REGARDS..

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sanket.joshi said:

refer following link.....
https://www.wireless.att.com/support_static_files/KB/KB11090.html

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jayanth.devarayanadurga said:

Baudrate correct?

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