serial pinouts

i am trying to interface t630 with 8051...... i have successfully interfaced with COMM port and checked all the at commands.... now i want to know the serial pinouts from t630 data cable.... plz help meee. which one will be Txd and RxD

http://pinouts.ru/CellularPhones-A-N/erics_t28_pinout.shtml

now i hve connected the rxd and txd with microcontroller......... I hve made the following program that will call from the cell phone bt this program is not working.... can anyone help wats wrong with this program....

STR_PTR EQU 30H

ORG 000H
JMP START

ORG 023H
JMP SERIAL

ORG 030H
START:
MOV SCON,#50H
MOV TMOD,#20H
MOV TH1,#-3
SETB TR1
SETB EA
SETB ES
MOV DPTR,#MSG1
MOV STR_PTR,#000H
MAIN:
MOV A,STR_PTR
MOVC A,@A+DPTR
MOV SBUF,A
JMP $
INC STR_PTR
JMP MAIN
JMP $
SERIAL:
CLR RI
CLR TI
RETI

MSG1: DB "ATD<cellno.>;",0DH

have you tried this command on hyper terminal? whats response there..? any dialing happens??

yup i hve done that and dialing is happening too. bt when i hve connected with hyperterminal thre is no response....what could be the problem

sorry i mean to say i hve done successfully with hyperterminal but when i connect it with 8051 there is no response

Was it working with hyperterminal @ 9600 baud?

tried some other commands with micro like sending sms?? also check whether your micro is communicating correctly over serial..

First of all.. sorry TPS for removing those offtopic posts..

test your phone on Hyper terminal see if its working or not..

Second write a simple program to send and receive data for you 8051, just to check circuit is fine..

write a simple programme and check if u can recv thhe same commands on hyperterminal..!