IU am trying to interface nokia 6210 with 8051 microcontroller. I am using dlr-3p cable for the connectivity. I am successfully sending sms through my module but reception side is not working. when I send at commands to nokia it doesn,t respond to microcontroller or may be microcontroller is not receiving it properly. I believe that in dlr-3p cable configuration , rts and dtr pins are not properly connected. How should I connect them ? I mean in which way , I should interface my nokia 6210 with microcontroiller using dlr-3p cable.
Waiting for reply.