Cant interface 8051 with a GSM module

i cant interface NXP2148 with the GSM module. i have used the UART1 (through RS232 DB9 using RXD, TXD and ground) to interface with the GSM module at 9600. when i send the command AT<CR> through hyperterminal...
problem while interfacing 8051 with gsm module

hai.. we are interfacing gsm module(sim300) with 8051 for led display....but we have problem here...we are able to interface the module with pc and getting proper response on hyperterminal...and also...
Cant interface 8051 with a GSM module

i cant interface NXP2148 with the GSM module. i have used the UART1 (through RS232 DB9 using RXD, TXD and ground) to interface with the GSM module at 9600. when i send the command AT<CR> through hyperterminal...
problem while interfacing 8051 with gsm module

hai.. we are interfacing gsm module(sim300) with 8051 for led display....but we have problem here...we are able to interface the module with pc and getting proper response on hyperterminal...and also...
interfacing the gsm module and 8051 micro controller

i'm doin a project in which i'm supposed to interface 8051 microcontroller wid a gsm module 2 send sms... the 8051 microcontroller is a silabs development kit and the gsm module is from multi tech....