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hi,
i find it really hard in configuring the modem using the µcontoller. How can i place an AT command using µcontoller?for example, how can i send ATA string to the modem,so that it can answer a call..
pls help..
Re: modem to 8051 connection
in relation to my first querie..
we tried to test it first by connecting the µcontroller directly to the serial port of the PC(without using modem and telephone lines)it actually works..
then,we tried to connect two pc(hyperterminal)both have modems, using the...
uln2803a latch relay
you must take into consideration the base current of the 2n3904..if still the relay doesn't trigger,try to use darlington pair instead..
modem to 8051 connection
hi! my question is what are the things we have to consider in order to achieve a connection b/w a remote pc(using hyperterminal) to a 8051 (connected to a external modem) via telephone line..
connection goes this way:
pc(hyperterminal)<--->modem<--->telepone...
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