gsm interface with microcontroller

hi, i am trying to interface gsm mobile(ericson )with 8051. mobile and microcontroller responding correctly if i connect with computer serial port(com).but i connect gsm mobile with 8051 with null modem...
gsm interfacing with microcontroller

Hello sir/madam, My name is srinivas.for my microcontroller interfaing to GSM modem application, first i tested GSM modem with PC that time , i am getting a new problem while interfaing PC with GSM modem...
gsm interfacing with microcontroller

Hello sir/madam, My name is srinivas.for my microcontroller interfaing to GSM modem application, first i tested GSM modem with PC that time , i am getting a new problem while interfaing PC with GSM modem...
gsm interface with microcontroller

hi, i am trying to interface gsm mobile(ericson )with 8051. mobile and microcontroller responding correctly if i connect with computer serial port(com).but i connect gsm mobile with 8051 with null modem...
interfacing gsm modules with microcontroller

pls, i need help. i am currently writing a project using interactive voice response system and i need to interface a gsm modem to a microcontroller using AT commands. anyone with useful info should pls...