Nokia 7250 Installation instructions

SUPPORT GUIDE FOR
THE NOKIA PHONES AND AT
COMMANDS
Copyright © Nokia. All rights reserved | Date: 11.11.02, ver. 1.0

Contents
1. INTRODUCTION..............................................................................................................1
2. BASIC AT-COMMANDS................................................................................................... 1
3. SENDING AND RECEIVING AN SMS ............................................................................. 2
SENDING AN SMS ..............................................................................................................2
RECEIVING AN SMS ........................................................................................................... 3
4. HIGHSPEED AT-COMMANDS ........................................................................................4
5. GPRS AT-COMMANDS ...................................................................................................6
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Copyright © Nokia. All rights reserved | Date: 11.11.02, ver. 1.0

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 AT
- should give OK for response
Reset the modem and set the factory defaults ATZ&F
No flow control AT&K[0]
Hardware flow control (CTS/RTS) AT&K3
Software flow control (XON/XOFF) AT&K4
Type in PIN-code in terminal AT+CPIN="pppp"
- where pppp is your pin code. Yes, the double quotes are needed
Check signal strength AT+CSQ
- value close to 0 means no field. Value 31.99 is maximum.
Start a data call ATDT nnnnnnn
- where nnnnnnn is the phone number.
Start a voice call ATDT nnnnnnn;
- where nnnnnnn is the phone number. Note the semicolon (;) is needed!
Hang up the call ATH
Answer incoming call ATA
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).
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3. SENDING AND RECEIVING AN SMS
SENDING AN SMS
1. Define the message format by typing AT+CMGF=1 (Text mode).
2. Set the Message centre number by typing AT+CSCA="XXX".
3. XXX is your network provider's message centre number (See Picture 1.).
4. Enter the recipient's phone number using the AT+CMGS="YYY" command (See Picture
1.).
4. Write the message and press Ctrl-Z.
Picture 1. Sending an SMS
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RECEIVING AN SMS
1. Define the message format by typing AT+CMGF=1 (See Picture 1.).
2. Type AT+CNMI=1,2,0,0,0 in order to see all the received messages (See Picture 2.).
Picture 2. Receiving an SMS.
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4. HIGHSPEED AT-COMMANDS
On the table below it is described AT-commands for Modem, ISDN v.110 and ISDN v.120
connections with different channel coding (speed of each slot) and timeslots (number of
receiving/transmitting slots). For example 3+1, 28800, 9600 means that the maximum speed
that you can receive data is 3x9600=28800 and maximum speed for sending data is
1x9600=9600, the maximum connection speed that is shown in the task tray is the same as
the maximum sending speed (28800).
Modem
at+cbst=7,0,1;+chsn=1,1,0,4
Timeslots Max Connection Speed Ch. Coding Protocol
1+1 9600 9600 V.32
at+cbst=12,0,1;+chsn=1,1,0,4
Timeslots Max Connection Speed Ch. Coding Protocol
1+1 9600 9600 V.34
at+cbst=14,0,1;+chsn=2,1,0,8
Timeslots Max Connection Speed Ch. Coding Protocol
1+1 14400 14400 V.34
at+cbst=15,0,1;+chsn=3,2,0,4
Timeslots Max Connection Speed Ch. Coding Protocol
2+2 19200 9600 V.34
at+cbst=16,0,1;+chsn=4,3,0,4
Timeslots Max Connection Speed Ch. Coding Protocol
3+1 28800 9600 V.34
at+cbst=16,0,1;+chsn=4,2,0,8
Timeslots Max Connection Speed Ch. Coding Protocol
2+2 28800 14400 V.34
V.110
at+cbst=71,0,1;+chsn=1,1,0,4
Timeslots Max Connection Speed Ch. Coding Protocol
1+1 9600 9600 V.110
at+cbst=75,0,1;+chsn=2,1,0,8
Timeslots Max Connection Speed Ch. Coding Protocol
1+1 14400 14400 V.110
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at+cbst=79,0,1;+chsn=3,2,0,4
Timeslots Max Connection Speed Ch. Coding Protocol
2+2 19200 9600 V.110
at+cbst=80,0,1;+chsn=4,3,0,4
Timeslots Max Connection Speed Ch. Coding Protocol
3+1 28800 9600 V.110
at+cbst=80,0,1;+chsn=4,2,0,8
Timeslots Max Connection Speed Ch. Coding Protocol
2+2 28800 14400 V.110
at+cbst=81,0,1;+chsn=6,3,0,8
Timeslots Max Connection Speed Ch. Coding Protocol
3+1 38400 14.4 V.110
V.120
at+cbst=39,0,1;+chsn=1,1,0,4
Timeslots Max Connection Speed Ch. Coding Protocol
1+1 9600 9600 V.120
at+cbst=43,0,1;+chsn=2,1,0,8
Timeslots Max Connection Speed Ch. Coding Protocol
1+1 14400 14400 V.120
at+cbst=47,0,1;+chsn=3,2,0,4
Timeslots Max Connection Speed Ch. Coding Protocol
2+2 19200 9600 V.120
at+cbst=48,0,1;+chsn=4,3,0,4
Timeslots Max Connection Speed Ch. Coding Protocol
3+1 28800 9600 V.120
at+cbst=48,0,1;+chsn=4,2,0,8
Timeslots Max Connection Speed Ch. Coding Protocol
2+2 28800 14400 V.120
at+cbst=49,0,1;+chsn=6,3,0,8
Timeslots Max Connection Speed Ch. Coding Protocol
3+1 38400 14.4 V.120
at+cbst=50,0,1;+chsn=6,3,0,8
Timeslots Max Connection Speed Ch. Coding Protocol
3+1 48000 14.4 V.120
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5. GPRS AT-COMMANDS
For GPRS there are only a few AT-commands because user can't define the speed or
timeslots.
Set Access Point Name AT+CGDCONT=,,"xxx";
- Where xxx is your APN, also note that in some devices that semicolon (;) is
needed and in some not
Start GPRS connection ATDT *99#
- Please verify the phone number from your GSM operator!
Other settings like DNS, IP address, username and password should be set in the device to
appropriate places. Usually only DNS needs to be set but others are either device or
operator depending (I e Palm Pilots need username to be defined (can be whatever), some
Psion models needs to have IP address set to 0.0.0.0 etc.). For further information on the
GPRS related issues, please contact your GPRS service provider.
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