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???
05/11/05 14:14
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 		 #93302 - interfacing external modem to at89c51
Responding to: ???'s previous message
I read all the messages in this domain, but the main problem is that I send the At command to the modem using the AT89c51, and take care of all problems and notes in the hardware in software, vut the modem did not response to the commands.
so if any one know any thing about how to intilize the external modem to 89c51 send it me please as soon as possible.

thanks for all members

List of 26 messages in thread
TopicAuthorDate
interfacing serial modem with 89c51??            01/01/70 00:00      
   rs232 level converter.            01/01/70 00:00      
      interfacing serial modem with 89c51??            01/01/70 00:00      
   Modem Settings            01/01/70 00:00      
      interfacing serial modem with 89c51??            01/01/70 00:00      
         Read the modem manual!            01/01/70 00:00      
            interfacing serial modem with 89c51??            01/01/70 00:00      
               Evaluate what is different            01/01/70 00:00      
                  interfacing serial modem with 89c51??            01/01/70 00:00      
                     Modem            01/01/70 00:00      
   Rx Tx pins            01/01/70 00:00      
   interfacing serial modem with 89c51??            01/01/70 00:00      
      connecting the front end of two cars            01/01/70 00:00      
         Errr...what did I mention earlier?            01/01/70 00:00      
            interfacing serial modem with 89c51??            01/01/70 00:00      
               Still            01/01/70 00:00      
   Modem sinulator on PC            01/01/70 00:00      
      Protocol analyzer            01/01/70 00:00      
         interfacing external modem to at89c51            01/01/70 00:00      
            How do you know?            01/01/70 00:00      
   command Timing            01/01/70 00:00      
      command timming            01/01/70 00:00      
   I don't want to give any secrets away!            01/01/70 00:00      
      please help !!            01/01/70 00:00      
         SCOPE            01/01/70 00:00      
         STOP trying to fix it, learn what it is.            01/01/70 00:00      

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