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sim300

hello,
I am new in this micocontroller world
actually I am interfacing sim300 gsm modem with 89c51, I want to indicate the incoming call on modem using lcd
but I am not getting how to stop reading the text, now I am using counter
means I have set the counter at 0, when there is a call on modem it sends ring continuously on serial port it creats interrupt then I an increasing counter when it reaches to 4 I am printing RING on lcd
bt for every command its nt possible to set counter every time
so I wanted to know what char does a modem sends after every ring because of which it prints ring on next line, if u check it on modem
want to grab that char and using that wants to stop reading
If any one knows anything about this plz reply me
thank you

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