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GSM Modem AT commands CMGS return Error

am using Prolink PSH300 HSUPA GSM Modem connect to my laptop and using tera term to test the connect.

First I entered AT it will response me OK

AT OK

AT+CMGF=1 OK

AT+CMGS="+6581XXXXXX" (then I pressed enter error was returned) ERROR

Sometime it won't return me error but just hang there no > return.

Could anybody advise me what to do?
Aug 26 '12 #1
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