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help me to interface the sim548c with atmega32

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yasirali

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SIM548C

hello members
help me to interface the sim548c with atmega32 .
i first tested it on it on hyper terminal .when i write AT it returns oK
but when i try to call ATD03469225754;
it returns as a "NO DIALTONE" error
what is going inside it ?
 

im working on the same device. if u had solve your problem can u please tel me also...
 
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    marc99

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Confirm that the SIM card is working fine by putting it in another mobile and trying to make a call.
 

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