Introduction; Basic At-Commands - Nokia 7250 Support Manual

1. INTRODUCTION

How to read/write SMS, start a modem, HSCSD or GPRS connection with Nokia phones by
using AT-commands.

2. BASIC AT-COMMANDS

Before making a dial-up connection it is recommended to reset the modem in phone and also
set the flow control. If you have PIN-code request on it can be typed in also with AT-
command (I e Nokia Card Phone may need this when used in non Windows environment).
Below some useful AT-commands:
Check that the connection between the phone and device works
- should give OK for response
Reset the modem and set the factory defaults
No flow control
Hardware flow control (CTS/RTS)
Software flow control (XON/XOFF)
Type in PIN-code in terminal
- where pppp is your pin code. Yes, the double quotes are needed
Check signal strength
- value close to 0 means no field. Value 31.99 is maximum.
Start a data call
- where nnnnnnn is the phone number.
Start a voice call
- where nnnnnnn is the phone number. Note the semicolon (;) is needed!
Hang up the call
Answer incoming call
During a call you can return to AT command interpreter with command +++ (three times
plus). Then you can give AT commands during a call. This is useful when calling to I e
banking service which requires you to enter information with keypad (especially when using
Nokia Card Phone).
AT
ATZ&F
AT&K[0]
AT&K3
AT&K4
AT+CPIN="pppp"
AT+CSQ
ATDT nnnnnnn
ATDT nnnnnnn;
ATH
ATA
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