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???
12/24/05 11:33
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#105872 - Not helpful?
Responding to: ???'s previous message
Nikhil Arora said:
do what we do for dialing other computer through a serial external modem

An external modem has already been suggested, and he's said it's no good:

http://www.8052.com/forum/read.phtml?id=105717

using this com/rs232 port now same things can be applied with 8051 and IC max232 using its RS232/serial port of 8051

A module will (almost certainly) use a logic-level interface - so an RS232 transceiver must not be used!
Just a straight logic-level connection direct to the processor pins.
Check the module datasheet!

However, the AT commands, etc, for the module will (almost certainly) be exactly the same as for an external modem.

also some derivaties of 8051 have full duplex serial port

As far as I know, all 8051s have a full-duplex serial port?


List of 23 messages in thread
TopicAuthorDate
transfering data through telephone line            01/01/70 00:00      
   External Modem            01/01/70 00:00      
      thats not possible            01/01/70 00:00      
         module            01/01/70 00:00      
            Ready made modem modules            01/01/70 00:00      
               thank you            01/01/70 00:00      
            More modules            01/01/70 00:00      
               PPP/SLIP            01/01/70 00:00      
                  Secure?            01/01/70 00:00      
                     OK, more strictly            01/01/70 00:00      
         Cmlmicro            01/01/70 00:00      
            Chips?            01/01/70 00:00      
               Just add water            01/01/70 00:00      
                  Laws            01/01/70 00:00      
                     Catch 22            01/01/70 00:00      
                        non-circular            01/01/70 00:00      
                           The OP is a student            01/01/70 00:00      
                              He said so himself            01/01/70 00:00      
                  Re: Just add water            01/01/70 00:00      
   Modem Module            01/01/70 00:00      
   56k - yet again            01/01/70 00:00      
   use rs232 like protocol            01/01/70 00:00      
      Not helpful?            01/01/70 00:00      

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