NOKIA PREMICELL RS232 DATA Users Guide
Nokia is a registered trademark of Nokia Corporation, Finland. 1997 Nokia Mobile Phones Ltd. All rights reserved. Nokia Mobile Phones operates a policy of continuous development. Therefore we reserve the right to make changes and improvements to any of the products described in this guide without prior notice. Nokia Mobile Phones is not responsible for any loss of data, income or any consequential damage howsoever caused. Issue 1 9351672
Important Safety Information
FOR YOUR SAFETY Read and follow all warning notices and instructions included in the sales package, in this Users guide and marked on the product itself. Breaking the rules may be dangerous and/or illegal. Further detailed information is given in this Users guide. CONNECTING TO OTHER DEVICES When connecting to any other device, please refer to its users guide for detailed safety instructions, do not connect incompatible products. INTERFERENCE All radio transmitting devices may at times incur interference which could affect performance. Only qualified service personnel must repair equipment.
MAKE BACKUP COPIES Remember to make backup copies of all important data to protect against its possible loss or alteration.
Do not drop or knock the adapter, or any way handle it roughly. Do not expose the adapter to moisture or excessive heat. Do not attempt to open the data adapter. Keep the connectors of the data adapter clean. Insert the data adapter correctly into the PremiCell terminal. The cable to be used with this product is in the sales package. If you need additional cables, consult your dealer or network service provider in order to get a compatible cable.
Using This Guide The wireless device described in this guide is designed to be used with Nokia PremiCell 09i/18i terminals in a GSM 900/1800 network. For further information about different network services operational in GSM 900 and GSM 1800 networks, please consult with your network service providers. All the safety instructions in the users guides of your PremiCell terminal and personal computer also apply when the equipment is used for data calls.

TABLE OF CONTENTS

Important Safety Information... 2 Your Data Adapter.... 3 Supported Computer Types... 4 Installing the Data Adapter... 4 Introduction to Wireless Communication... 6 Factors that May Affect Wireless Data Transmission.. 6 Flow Control.... 7 Communications Applications... 8 Data Calls.... 8 Short Messages.... 9 Short Message Facility of the Terminal.. 9 Using Nokia DataSuite... 9 Technical Specifications...10 Troubleshooting...11

Your Data Adapter

The data adapter grants you access from your personal computer to network services via your PremiCell terminal. Please ask your network operator for information on the availability of different services. Before you can benefit from the services provided by the data adapter, you may need to subscribe to the corresponding services (data, fax and SMS short messages service) available from your network operator. Note: Use the data adapter and its cable only with PremiCell 09i/18i terminals. Please note that normal landline modem is not compatible with the Nokia PremiCell 09i/18i, so you cannot connect it to the terminals phone or fax socket. If you have a fax-modem, however, you can connect it to the terminals fax socket to send faxes from your computer. Please also note that normal computer fax applications cannot be used with the direct RS232 data connection. You can have access to computer fax-services with the Nokia DataSuite software, described later in this Users guide.
1999 Nokia Mobile Phones. All Rights Reserved.
Picture 1: AFW-3 data adapter enables the use of advanced communication functions of GSM networks via your PremiCell terminal. Supported Computer Types The data adapter can be used with most modern personal computers equipped with an RS232 serial port.

Installing the Data Adapter
The sales packet includes: Data adapter AFW-3
SIM-cover (modified for data use) This Users guide List of AT Commands
Note: Do not start your communications application before you have connected the data adapter to the serial port of your computer and to your terminal.

Installation procedure:

Switch off the terminal and your computer. Remove the old SIM cover and remove your SIM card from it (see picture). Attach your SIM card to the new modified SIM cover and insert it into the terminal (see picture). Connect the data adapter to the connector C of your premiCell terminal with the Nokia logo facing up (see picture). Connect the other end of the cable to the RS232 serial port of your computer. Check that both ends of the cable are firmly connected. Now you can power up your computer and PremiCell terminal. To install the modem profiles on your computer, please refer to the handbooks /help files of your computer operating system.
Introduction to Wireless Communication
Wireless data connections can be made from most locations where your PremiCell terminal operates. Networks differ from land-line networks in many ways, for example traffic loads and the strength of radio signals may vary in a wireless network and cause handovers. It is recommended that you install the PremiCell terminal to a location where the strongest possible signal can be obtained (see the Low Signal Strength section below). When the signal is strong, the data transmission is most efficient. Factors that May Affect Wireless Data Transmission Noise Wireless connections may be impaired by radio interference from electronic appliances and equipment, as well as from other terminals or phones. Handover As e.g. aeroplanes or big trucks move near the area where the terminal is located, the strength of the channel drops and the network hands the user over to a different cell and frequency, where the signal is stronger. A handover may also occur due to varying wireless traffic loads. Such handovers may cause slight delays. Dead Spots Dead spots are areas where radio signals cannot be received. Electrostatic Discharge (ESD) A discharge of static electricity from a finger or a conductor may cause erroneous functions in electrical devices. The discharge can result in an unreliable wireless connection; the data may then become corrupted and the transmission halts. Should this happen, you may need to restart your computer as well as the terminal, and then establish a new connection. Fast Transients in the AC Power System Sometimes in an AC power system there may be voltage peaks which can disturb a connection. The data may become corrupted and the transmission is halted. Should this happen, you may need to restart your computer as well as the terminal, and then establish a new connection.
Low Signal Strength Due to either distance or obstacles, radio signal strength from a cell site may not be strong or stable enough to provide a reliable connection. Therefore, to ensure the best possible conditions for communication, remember to consider the following points:

The data connection functions best if the terminal is in a stationary

position.

Check that the terminal has enough signal strength. Moving the ter-
minal within a room, especially closer to a window, may result in a stronger signal. If the signals are not strong enough to support a voice call, you should not attempt to establish a data connection either. For monitoring the strength of the signal see the Nokia PremiCell Users Guide section 2, Installation. Also keep your terminal and computer 50 cm or more apart to avoid radio frequency disturbances (interference) and to ensure the best possible radio operation. Flow Control Flow control is a method of stopping and restarting data flow between two devices. This prevents one device from receiving too much data from the other, so that its buffer (a temporary data storage area) does not become full and overflow resulting in errors or loss of data. Software and hardware controlled flow controls are the two most commonly used flow control methods. The computer is often able to send data to the terminal faster than the terminal can transmit it to the network. To prevent the terminal buffer from overflowing, the terminal alerts the computer when the buffer is almost full. All data applications do not allow you to change the flow control settings of the application itself, so the only possibility is to change the flow control settings of the terminal.
Settings can typically be changed by adding the string S34=1 or S34=2 at the end of the initialization string of your application. The S34 register is used to control the flow control settings of the terminal. The value 1 is the XON/XOFF (or software) flow control, and the value 2 is the RTS/CTS (or hardware) flow control method. You can also use the AT+IFC command to change the flow control settings. See the list of AT Commands for further details on the command. To change the flow control method of your communications application, refer to its documentation. Note: Make sure that the same flow control method is selected for the terminal and for the communications application. Communications Applications You can use your data adapter with a variety of communications applications. One basic setting you may need to check is the communications port (COM port) used by your application. The COM port in your application must correspond to the port that your data adapter is configured to use. See also the Flow Control section above. If you have any problems, turn to the Troubleshooting section at the end of this Users Guide. AT Commands and S-registers The terminal is designed to be controlled within communication applications with so-called AT commands in a way very similar to a modem. AT commands order the data adapter to perform a task, while S-registers are used to determine how some AT commands will perform a task or to configure other options. Most communications applications have a user-friendly interface that hides AT commands from the user. Advanced users can also operate the data adapter manually with the AT commands. See the List of AT Commands for more information on the available commands and S-registers that can be used to control the terminal. Data Calls There are usually two ways to make a data call. You can either use the pull-down menus of your communications application, or use the AT commands to control the terminal. Once the dial command has been issued, the terminal opens the connection and dials the number indicated.

Short Messages Short Messages Service (SMS) messages are short text messages of up to 160 characters which can be transmitted over a digital wireless network. It is possible to send SMS messages to digital wireless phones or fixed wireless terminals from other wireless devices or remote computer terminals. These short messages will then be stored by the network service centre until delivery and are acknowledged upon receipt. Short messages are always sent first to a Short Message Service Centre run by the wireless network, which then forwards the message to the recipient. Short Message Facility of the Terminal You can display the received messages by using the keyboard of your computer. To activate the Nokia SMS Interpreter, give the AT command AT*C (see the list of AT Commands for more details on the command). You can access SMS services more conveniently via specific SMS applications, e.g. Nokia DataSuite (see the Using Nokia DataSuite section below). Using Nokia DataSuite You can use Nokia DataSuite to send and receive SMS messages on your computer via the PremiCell terminal. Nokia DataSuite includes a comprehensive set of features. These include, e.g., fax, file transfer, e-mail and Internet access. Note: To use DataSuite, you need to have a Nokia AFW1 data adapter (accessory). For more information on your DataSuite software, see the Installation guide included in the DataSuite sales package and Nokias web-site at www.nokia.com.

Technical Specifications

Data Facility
Non-transparent bearer service AT Command Set with industry de facto extensions, and extensions
from the European Telecommunication Standard ETS 300642 and from V.25ter
V.25bis Command Set Data Terminal Equipment controlled dialling and answering Supported data rates: 300, 1200, 2400, 4800, 7200, and 9600 bits/

Short Messages Facility

European Telecommunication Standard ETS 300585 Nokia SMS Interpreter

DTE Data Rates

300-19 200

Terminal Parameters

Asynchronous Data bits: 7 or 8, Stop bits: 1 or 2 Parity: none/odd/even

Flow Control

Hardware (RTS/CTS), or software (XON/XOFF), or both, or none

Stored Configurations

Two user-definable sets, User Profile 0 and User Profile 1

Terminal Interface

Compatible with: Nokia PremiCell 09 and Nokia PremiCell 18
Specifications are subject to change without notice.

Troubleshooting

Overview This chapter points out the basic problems that could occur when operating with the data features of the PremiCell terminal. If the information is not transferred from the transmitting device to the receiving device, the cause of the error could be in the equipment at either end. It could also be in the communications application or the result of a poor communication line. Incompatibilities may also cause problems. With the AT command AT F, you can restore the factory settings of the data adapter including all the S-register settings. You should note, however, that this command does not save them. If you want to save the factory settings for further use, save them either with the command AT W0 or AT W1 in either User Profile 0 or User Profile 1. When you change Sregister settings, the Active User Profile changes. New settings in the active profile are not permanently stored unless the command AT W0/1 is issued to the terminal.

Table 1: Solutions for difficulties you may have when establishing a connection between terminal and computer.
Symptom The terminal does not respond
1 Make sure that the adapter is properly

Action

2 Make sure that the communications application has the correct COM port selected. Terminal does not respond correctly during initialization Check that the modem type and its initialization string are correct for the terminal. See the documentation of the application you are using for further details on how to change or customize the modem settings. nated with a carriage return (<ENTER>).
inserted into the terminal and the computer.
Terminal does not echo back AT commands correctly
1 Make sure that all AT commands are termi2 Use your communications application to 3 Make sure that the computers nominal
data rate is supported by the terminal. verify that the computer has a valid character format. See the Technical Specifications for the valid formats.
4 Issue the ATE1 command to ensure that
characters can be echoed back to your monitor. An OK response should appear. Then, enter an AT command and carriage return to check that characters are displayed on the monitor.
Table 2: Solutions to problems that may occur when your terminal fails to start communication.
Symptom The terminal starts dialling, but does not make a connection.
1 All the channels in your area may be occu2 Move to a better position and try again.
You may have a poor connection. pied at the moment. Wait for a few seconds before redialling. This may also occur when you are dialling a voice call.
3 Some network operators may not support
4 Data services are not necessarily automat-
autobauding. Try typing the command ATS35=6 in your application. This command selects a fixed transmission speed of 9600 bps. If this does not help, try entering other values for the S-register. See the List of AT Commands for further information on other S-register values.
ically activated in the service subscription of your network operator. If you are not sure whether the services are activated, please contact your local network operator.
Terminal does not automatically answer an incoming call. Terminal establishes a connection but then disconnects the call.
Verify that the Auto Answer Ring Count configuration option (S-register S0) is set to a value other than 0 (the function is disabled when the value is 0).
1 You may have poor radio communication. 2 Make sure that the remote modem
Try moving to a better position and dialling again. If the problem persists, an external antenna may be needed. supports the selected protocol (data mode).

Symptom

Data is scrambled/lost during data transmission.

1 Make sure that you have the same flow control 2 Try again. You may have a poor connection. See
the above section, Factors That May Affect Wireless Data Transmission in this guide. method selected for the data adapter and for the communications application.

1. Introduction

Computers use AT commands to communicate with modems, i.e. you can use the commands described in this booklet to use data connections via your PremiCell terminal. Most communications applications, however, have a user-friendly interface that hides these AT commands from the user. The AT commands supported by the data adapter are listed below according to their uses. A short description, the syntax, the possible setting values and responses of the AT commands are presented. Note that the AT or at prefix must be included at the beginning of each command line. You may type several AT commands on the same line, and in such cases you need to type the AT or at prefix only at the beginning of the command line. Some AT commands are not supported by all Nokia products. Giving a command which is not supported causes an error response, and if the extended error report feature has been enabled with the AT+CMEE command, the error response also reports that the command is not supported with the product used. Also, some parameters may not be supported by all products, and in this case those parameters are just ignored in commands or left blank in responses.

1.1 Command Syntax

The letter <n> used in a command syntax is the setting value typed in as a part of the command. If the value is optional it is enclosed in square brackets. Setting values for the commands are presented below under the description of the command. When you select a setting value with an AT command, the setting is valid until you change it. The functionality of a particular command form is described on the right side of the syntax, and after that follows the command response. Note: Default values are marked with bold.
1.2 Syntax of AT+ Commands
When you want to set or display a value for a setting, or you want to know the valid values, type in AT+ the command string followed by =n, ?, or =?, and press <ENTER>. 1) AT+__=n To write in a new setting with the command. 2) AT+__? Displays the current setting for the command. 3) AT+__=? Displays all setting values that can be used with the command.

1.3 Help on AT Commands

To get general Help on the AT commands supported by the terminal, use the commands AT? or AT?0. To get Help on a functional group of AT commands type: AT?n (n= the number of the group). You issue AT commands to the data adapter via your communications application. When the data adapter receives a command, it responds with a message that is displayed on your computer screen.

1.4. Most common AT-commands
This section introduces the most commonly used AT commands with a brief description. You can find more detailed information on the command on the page indicated in the description. AT? Command Help (Page 30) Displays a list of available AT commands and Help in English. This command must stand alone on the command line. ATA Answer Command (Page 7) Answers an incoming call. If there is already a voice call active, the call is switched to data/fax receiving mode (depending on the application you are using). ATD Dial Command (Page 7) Initiates a call. When a data call is initiated, the command has to contain the recipients number or a directory entry which contains the stored number.
ATEn Command Echo (Page 20) Determines whether or not characters are echoed in the command mode. n = 0 / n not present n=1 ATHn Hang-Up (Page 9) Hangs up the call. n = 0 / n not present clears the call echoing disabled echoing enabled
ATO Go On-Line (Page 9) Returns data adapter to on-line mode, after a connection has been established and the escape sequence (+++) has been issued. ATS Select an S-Register (Page 11) ATSr? Displays the value of S-register r. ATSr=n Sets the value of S-register r.
ATV Define Response Format (Page 20) Determines whether result codes are transmitted in numeric or alphanumeric form. ATV[0] ATV1 Numeric responses (short form) Textual responses (long form)
AT&F Restore Factory Settings (Page 12) Restores all factory settings including S-register settings but does not save them. AT&V View Active Configuration (Page 12) Displays the current S-register settings.
A/ Re-execute Command Line (Page 30) Re-executes the command preceding this request. If this was the first request, then an OK status will be returned. +++ Escape Sequence (On-Line Command Mode) Returns the data adapter to command mode after a connection has been established, without breaking the connection. The data adapter must be in command mode to accept AT Commands.
2. Descriptions of AT Commands

2.1. Call Control

ATA Answer Command This command answers an incoming call. The call is indicated by the RING or +CRING message on the terminal equipment or by the number 2 if numeric mode has been selected. Syntax: ATA Answer incoming call.

AT&F Restore Factory Settings The command restores all the factory settings including all the SRegister settings but does not save them. Syntax: AT&F Restore factory settings.
AT&V View Active Configuration This command displays the current values of the S-registers and other settings. Syntax: AT&V View active configuration.
AT&W Store Parameters In Given Profile This command stores the current S-register and other settings to one of two user profiles. Syntax: AT&W[0] AT&W1 Store settings to user profile 0. Store settings to user profile 1.
AT&Y Select Set As A Powerup Option Defines which user profile (0 or 1) the parameters are loaded from when the data adapter is activated. Syntax: AT&Y[0] AT&Y1 Load parameters from set 0. Load parameters from set 1.
AT+GCAP Request Complete Capabilities List This command causes the data adapter to display information intended to permit the user to identify the overall capabilities of the data adapter. Syntax: AT+GCAP Display data adapter capabilities. Response is +GCAP: +CGSM which means that cellular commands are supported. AT+GMI Request Manufacturer Identification This command displays the data adapter manufacturer identification. Syntax: AT+GMI Display manufacturer identification.
AT+GMM Request Model Identification This command displays the terminal model identification. Syntax: AT+GMM Display model identification.
AT+GMR Request Revision Identification This command displays the terminal revision identification. Syntax: AT+GMR Display revision identification. AT+GSN Request Product Serial Number Identification This command displays the terminal serial number. Syntax: AT+GSN Display serial number.
2.3. Terminal Control Commands
AT+CGMI Request Manufacturer Identification This command displays phone manufacturer identification. Syntax: AT+CGMI Display manufacturer identification. AT+CGMM Request Model Identification This command displays the terminal model identification. Syntax: AT+CGMM Display model identification. AT+CGMR Request Revision Identification This command displays the terminal revision identification. Syntax: AT+CGMR Display revision identification. AT+CGSN Request Product Serial Number Identification This command causes the terminal to display its serial number. Syntax: AT+CGSN Display serial number.

AT+CMEE Report Terminal Error This command disables or enables the use of the result code +CME ERROR: <err> as an indication of an error relating to the functionality of the terminal. When enabled, terminal related errors cause the +CME ERROR: <err> result code instead of the regular ERROR result code. ERROR is returned normally when the error is related to syntax, invalid parameters, or data adapter functionality. Syntax: AT+CMEE=[<mode>] code. AT+CMEE? AT+CMEE=? +CMEE: Values for <mode>: 2 disable the result code and use ERROR instead enable the result code and use numeric values enable the result code and use verbose values Enable or disable terminal error result Query current setting. Response is +CMEE:<mode>. Show supported modes. Response is (list of supported <mode>s).
AT+CPAS Terminal Activity Status This command returns the activity status of the terminal. It can be used to interrogate the terminal before requesting action from it. Syntax: AT+CPAS <pas>. AT+CPAS=? +CPAS: Values for <pas>: 0 ready (terminal allows commands from DTE) Query terminal status. Response is +CPAS: Show supported status values. Response is (list of supported <pas>s).
1 from 3 and an 4 from DTE
unavailable (terminal does not allow commands DTE) ringing (terminal allows commands from DTE incoming call is waiting to be answered) call in progress (terminal allows commands but a call is in progress)
AT+CPBF Find Phone Book Entries This command returns phone book entries where the alphanumeric field starts with the search string <findtext>. Entries are searched from the current phone book memory storage selected with the AT+CPBS command. The format used for string information is selected with the AT+CSCS command. Syntax: AT+CPBF=<findtext> Find entry. Response is +CPBF: <index>,<number>, <type>,<text> and it is repeated several times if more than one entry matches the search. AT+CPBF=? Parameters: <index> <number> <type> 145 for phone book memory location number phone number type of number, 129 for normal (default) and international access (number contains + character) <text> whole text field of the found entry Show maximum field lengths. Response is +CPBF: <nlength>,<tlength>.
<nlength> <tlength>
maximum length of the field <number> maximum length of the field <text>
AT+CPBR Read Phone Book Entry This command returns phone book entries in a location number range <index1>.<index2> from the current phone book memory storage selected with the AT+CPBS command. If <index2> is left out, only the location <index1> is returned. The format used for string information is selected with the AT+CSCS command. Syntax: AT+CPBR=<index1>[,<index2>] Read phone book entry. Response is +CPBR: <index>, <number>, <type>, <text> and repeated several times if more than one entry is read. AT+CPBR=? and sponse is +CPBR:(list of supported <index>s), <nlength>, <tlength>. Parameters: <index> <type> for phone book memory location number <number>phone number type of number, 129 for normal and 145 international access (number contains + character) <text> <nlength> <tlength> text field related to entry maximum length of the field <number> maximum length of the field <text>

Show list of supported indexes maximum field lengths. Re-
Example: AT+CPBR=20,22 Read SIM card memory locations 20 to 22.
AT+CPBS Select Phone Book Memory Storage This command selects phone book memory storage, which is used by the phone book write commands. See +CPBW command. This command also affects the command AT+CPBF by setting the search to start from the memory storage selected by this command. Syntax: AT+CPBS=<storage> AT+CPBS? AT+CPBS=? sponse Values for <storage>: "SM" SIM's phone book Example: AT+CPBS="SM" card Select active phone book memory to be the SIM memory. AT+CPBW Write Phone Book Entry This command writes a phone book entry in a location number <index> in the current phone book memory storage selected with the AT+CPBS command. The format used for string information is selected with the AT+CSCS command. Syntax: AT+CPBW=<index>,<number>,<type>,<text>Write phone book entry. Select phone book memory storage. Query current setting. Response is +CPBS:<storage>. Show supported memory storages. Reis +CPBS: (list of supported<index>s).
AT+CPBW=,<number>,<type>,<text> to AT+CPBW=<index> try. AT+CPBW=? and sponse is
Write phone book entry first free location. Delete phone book en-
Show list of supported indexes maximum field lengths. Re+CPBW: (list of supported<in-
dex>s), <nlength>, <tlength>. Parameters: <index> number <number> <type> tional access (+ character added to number) <text> <nlength> <tlength> <text> Example: AT+CPBS=" SM" ory to Select active phone book membe the SIMs memory. text field related to entry maximum length of the field <number> maximum length of the field phone book memory location phone number type of number, 129 for normal (default) and 145 forinterna-
AT+CPBW=24,"285111",,"Mr Smith" Store number 285111 in the terminal's memory location 24 with the name Mr Smith. AT+CSCS Select TE Character Set This command informs the data adapter as to which character set is used by the DTE. The data adapter is then able to convert character strings correctly between DTE and mobile equipment character sets. This setting affects text mode SMS data and alpha fields in the phone book memory. Syntax: AT+CSCS=[<chset>] AT+CSCS? AT+CSCS=? Select character set. Query current setting. Response is +CSCS: <chset>. Show supported character sets. Response is +CSCS: (list of supported <chset>s). Values for <chset>: "GSM" ily GSM default alphabet; this setting eascauses software flow control (XON/XOFF) problems "HEX" decimal equals three characters with the decimal values 3, 47 and 230 "IRA" T.50) "PCCP437" "PCDN" "8859-1" international reference alphabet (ITU-T PC character set Code Page 437 PC Danish/Norwegian character set ISO 8859 Latin 1 character set character strings consist only of hexanumbers from 00 to FF; e.g. "032FE6"

AT+CSQ Signal Quality This command returns the received signal strength indication <rssi>. Bit error rate indication is not supported. Syntax: AT+CSQ Query signal strength. Response is +CSQ: <rssi>, 99. AT+CSQ=? Show supported values. Response is +CSQ: (list of supported <rssi>s), 99. Values for <rssi>: 2.99 -113dBm or less -111 -112dBm -109.-53 dBm -51 dBm or greater not known or not detectable
2.4. Computer Data Adapter Interface Commands
ATE Command Echo This command determines whether or not characters that are received from the DTE are echoed in the command mode. Syntax: ATE[0] ATE1 Disable echoing. Enable echoing.
ATQ Result Code Suppression This command determines whether or not responses are sent to the DTE. Syntax: ATQ[0] ATQ1 Enable sending of responses to DTE. Disable sending of responses to DTE.
ATV Define Response Format This command determines whether result codes are transmitted in a numeric form or an alphabetic (or verbose) form. Syntax: ATV[0] ATV1 Select numeric (short form) responses. Select textual (long) responses.
ATX Response Range Selection This command selectively enables or disables the response codes sent to the DTE. Syntax: ATX[0] ATX1 ATX2 ATX3 ATX4 ATX5 Enable response codes 0. 4. Enable response codes 0. 5, 10. Enable response codes 0. 5, 10. Enable response codes 0. 5, 7, 10. Enable response codes 0. 5, 7, 8, 10. Enable all response codes.
AT&C Define DCD Usage This command determines how the state of the DCD V.24 signal relates to the detection on the received line signal from the distant enSyntax: AT&C[0] AT&C1 Keep DCD always ON. Enable normal DCD usage*
*This is "always ON" with 09i/18i PremiCell. The command is included for compatibility purposes. AT&D Define DTR Usage This command defines how the DTR V.24 signal from the DTE is handled. Syntax: AT&D[0] DTR is ignored if AT&Q0 is selected. DTR ON-OFF hangs up the terminal if AT&Q2 is selected.
AT&D1 AT&D2 AT&D3 data

DTR ON-OFF causes a transition to the on-line command state. DTR ON-OFF hangs up the phone. DTR ON-OFF hangs up the phone and resets the parameters to the start-upvalues.
AT&K Select Flow Control This command selects the local flow control mode. Using this command is not recommended, instead use the AT+IFC command. Syntax: AT&K[0] AT&K3 AT&K4 Disable flow control. Set hardware flow control (CTS/RTS). Set software flow control (XON/XOFF).
AT&Q Define Communications Mode Option This command defines the dialling and on-line options. Syntax: AT&Q[0] AT&Q2 es a slot one (1). DTR ON to OFF hangs up the phone. Enable normal asynchronous operation. Enable DTR controlled dial. DTR OFF to ON causcall to be made to the number stored in the dial
AT&S Define DSR Option This command defines how the DSR V.24 signal is handled. Syntax: AT&S[0] AT&S1 Keep DSR always ON. Enable normal DSR usage*
*This is "always ON" with 09i/18i PremiCell. The command is included for compatibility purposes.
AT+ICF DTE-DCE Character Framing This command is used to determine the character framing that the data adapter uses while accepting commands and while transmitting information text and a result code to/from a DTE. Note: The terminal does not support autobauding. Therefore, after changing character framing settings of the data adapter and your communications application, close and restart the communications application. For repeated use of these settings you should issue the AT-commands AT&W and AT&Y. Syntax: AT+ICF=[<format>[,<parity>]] Set character framing. AT+ICF? AT+ICF=? Parameters: <format> data, no parity, 1 stop 6 <parity> data, no parity, 2 stop 7 data, parity, 1 stop 7 data, no parity, 1 stop odd even none Query current setting. Response is +ICF:<format>,<parity>. Show valid range of parameters. Response is +ICF:(1-6), (0,1,4).
AT+IFC DTE-DCE Local Flow Control This command is used to control the operation of local flow control between the DTE and the data adapter. <DCE_by_DTE> specifies the flow control used by DTE to control the flow of received data from the data adapter. <DTE_by_DCE> specifies the flow control used by a data adapter to control the flow of transmitted data from the DTE. Syntax: AT+IFC=<DCE_by_DTE>,<DTE_by_DCE> Set flow control. AT+IFC? Query current setting. Response is +IFC:<DCE_by_DTE><DTE_by_DCE>. AT+IFC=? ters. Parameters: <DCE_by_DTE> 0 no flow control XON/XOFF (software) flow control CTS/RTS (hardware) flow control both XON/XOFF and CTS/RTS flow control no flow control XON/XOFF (software) flow control CTS/RTS (hardware) flow control Show valid range of parameResponse is +IFC:(0-3),(0-2).

EXIT SCA=<phone number> phone short
Exit the SMS interpreter. Change the service centre number through which your messages are transmitted.

VALIDITY=<n> short

Defines the length of time that sent messages await delivery at the Service Centre, if the receiver is inaccessible.
<n> may have following values: NONE work 0..143 144.167 168.196 197.255 Waiting time will be determined by net(n + 1) x 5 min 12 hours+(n-143) x 30 min (n -166) x 24 hours (n -192) x 1 week
REPLY_PATH=ON, REPLY_PATH=OFF The recipient is allowed to reply to the received message at the senders expense, when the reply path isset to on. CONFIRMATION=ON, CONFIRMATION=OFF Sets the confirmation of message delivery to on or off. DATA_BITS=7, DATA_BITS=8 Sets the number of data bits used in a short message transmission. DATA_BITS=8 can only be used when CLASSis not DEFAULT.
CLASS=<class> follow-
Set message class. <class> may have ing values: DEFAULT sets the data coding scheme to a value according to Phase 1 GSM specifica-
tions, number of bits is set to ately by the receiver as it is not stored automatically 2 card memory PROTOCOL=<protocol> ceiver tre of the network provides the conversion of the message. The remote party must be connect ed to an appropriate terminal device. <protocol> may have following values: DEFAULT, TELEX, FAX_G3, FAX_G4, VOICE, ERMES, TELE-TEX, UCI, X.400, TYPE0, TYPE1, TYPE2, TYPE3, TYPE4, TYPE5, TYPE7. AT*T Enter SMS Block Mode Protocol This command sets the data adapter in the SMS Block mode. The final result code OK (or 0) shall not be returned until the SMS Block mode is exited. Either the response OK or ERROR is returned. Syntax: Select the protocol supported by the reof the short message. The Service Cenmessage should be stored in the SIM message should be displayed immedi-

Activate SMS Block mode.

AT*V Activate V.25bis Mode This command activates the CCITT V.25bis command mode. Syntax: AT*V Activate V.25bis command mode
AT*NOKIATEST Test Command This command can be used to test that the data adapter communicates with the terminal. Either the response OK or ERROR is returned. Syntax: AT*NOKIATEST Test connection to terminal. AT+CESP Enter SMS Block Mode Protocol Sets the data adapter in the SMS Block mode. The final result code OK (or 0) shall not be returned until block mode is exited. Syntax: AT+CESP Activate SMS Block mode.
2.8. SMS Commands Used in Text and PDU Modes
AT+CSMS Select Message Service This commands selects the messaging service and returns the type of messages supported. The supported service is specified by GSM 03.40 and 03.41 (service value 0). Syntax: AT+CSMS=0 AT+CSMS? AT+CSMS=? Select message service. Response is +CSMS: <mt>,<mo>,<bm>. Query current setting. Response is +CSMS: 0,<mt>,<mo>,<bm>. Show supported services. Response is +CSMS: 0.

AT+CSDH Show Text Mode Parameters This command controls whether detailed header information is shown in text mode short message result codes. Syntax:
AT+CSDH=[<show>] header AT+CSDH? AT+CSDH=?
Enable or disable showing of detailed information. Query current setting. Response is +CSDH: <show>. Show supported values. Response is +CSDH: (list of supported <show>s).
Values for <show>: 0 mands +CMT, +CMGL, +CMGR result codes for SMS text mode 1 show all the values in result codes do not show header values defined in com+CSCA and +CSMP nor <length>, <type> in
AT+CSCB Select Cell Broadcast Message Types This command selects which types of cell broadcast messages are to be received by the terminal. Syntax: AT+CSCB=[<mode>[,<mids>[,<dcss>]]] AT+CSCB? AT+CSCB=? <mode>s). Parameters: <mode> Show valid values. Response is +CSCB: (list of supported Select message types. Query current setting. Response is +CSCB: <mode>, <mids>, <dcss>.
0 are 1 are <mids>: <dcss>: ing
message types specified in <mids> and <dcss> accepted message types specified in <mids> and <dcss> not accepted all different possible combinations of message identifiers, example: "0,1,5,10-20,22" all different possible combinations of data codschemes, example: "0-3,5"
AT+CSAS Save Settings This command saves active message service settings to a non-volatile memory. Saved values are not automatically restored after terminal power up. Syntax: AT+CSAS[=<profile>] Save settings. AT+CSAS=? Show valid values. Response is +CSAS: (list of supported <profile>s). Values for <profile>: 1 settings are stored to terminal memory
AT+CRES Restore Settings This command restores message service settings from a non-volatile memory. Syntax: AT+CRES[=<profile>] AT+CRES=? Restore settings. Show valid values.
Response is +CRES: (list of supported <profile>s). Values for <profile>: 1 memory settings are restored from terminal
AT+CNMI New Message Indications to DTE This command selects how the receiving of new messages from the network is indicated to the DTE. See section Special responses in AT command mode for detailed description of the syntax of indication responses. Syntax: AT+CNMI=[<mode>[,<mt>[,<bm>[,<ds>[,<bfr>]]]]] Select indication procedure. AT+CNMI? Query current setting. Response is +CNMI: <mode>,<mt>,<bm>,<ds>,<bfr>. AT+CNMI=? Show valid values. Response is +CNMI: (lists of supported <mode>s), (<mt>s), (<bm>s), (<ds>s), (<bfr>s). Parameters: <mode> served 2 DTE-DCE flush them to the DTE after reservation has ended <mt>

For changing the S22 Register use the following AT commands for changing the response ranges: ATX0 responses 0-4 are enabled ATX1 responses 0-5, 10 are enabled ATX2 responses 0-5, 10 are enabled ATX3 responses 0-5, 7, 10 are enabled ATX4 responses 0-5, 7, 8, 10 are enabled ATX5 all responses are enabled Bit-mapped options: bits 4, 5 and 6. bits 6&5&4: 000=ATX0, 100=ATX1, 101=ATX2, 110=ATX3, 111=ATX4, 001=ATX5 E.g. if bit 4 is 0 and bits 5 and 6 are 1, the command ATX3 has been executed. Detect DTR change (seconds). For defining the communication mode option and changing the S27 Register use the ATQn command: AT&Q0 for the normal asynchronous operation, AT&Q2 for the DTR controlled dialling (on the DTR ON-OFF transition the terminal adapter automatically dials the number in the slot &Z0). Bit-mapped options: bit 1. bit 1: 0=AT&Q0, 1=AT&Q2 Local flow control 0=none 1=XON/XOFF 2=CTS/RTS 3=both XON/XOFF and CTS/RTS 16

S25 S27

Remote modem type 0=none (ISDN connection ) 1=V.21 2=V.22 3=V.22bis 4=V.23 5=V.26ter 6=V.32 7=autobauding (mobile switching centre selects a compatible modem) 8=undefined Command Interpreter mode 0=EIA/TIA - 602 1=CCTT V.25bis S39 stores the ID number of the terminal adapter in a decimal format. The ID can be displayed with the ATI0 command. Type of number 0=Unknown 1=International 2=National 3=Network specific 4=Dedicated PAD Numbering plan 0=Unknown 1=ISDN/telephony (E.163/E.164) 2=Data (X.121) 3=Telex (F.69) 4=National 5=Private Radio Link Protocol uplink window size (0-61). Radio Link Protocol downlink window size (0-61). Radio Link Protocol T1 timer value (39-255) seconds/100. 7

S42 S43 S44

S45 S46
Radio Link Protocol N2 repetition count (1-255). Force Data Compression (only for mobile to mobile connections) 0=Disabled 1=Data compression in transmit direction only 2=Data compression in receive direction only 3=Data compression in both directions Error Correction Mode with FClasses 2 and 2.0 0=Disabled 1=Enabled, 64 byte frames 2=Enabled, 256 byte frames 6 0
4. Special Responses in AT Command Mode
4.1 +CME ERROR Mobile Equipment Error Result Code
The operation of the +CME ERROR: <err> result code is similar to the regular ERROR result code. If +CME ERROR: <err> is the result code for any of the commands in a command line, none of the following commands in the same command line are executed. Neither the ERROR nor the OK result code will be returned as a result of a completed command line execution. The format can be either numeric or verbose. This is set with the command +CMEE. <err> values (numeric format followed by verbose format): terminal failure no connection to terminal terminal-adapter link reserved operation not allowed operation not supported SIM not inserted

<pid> <dcs> <sca>
protocol identifier in integer format SMS Data Coding Scheme service centre address
<typesca> type of service centre address, 129 for normal and 145 for international access (number contains + character)
4.7 +CDS Received Status Report Routing
This response is used to carry a received short message status report to the DTE when direct routing has been activated with the AT+CNMI command. The response +CDS:<length><CR><LF><pdu> is used when PDU mode is enabled, and +CDS: <fo>,<mr>,[<addr>], [<type>], <scts>,<dt>,<st> when text mode is used. <length> length of the actual PDU in octets <pdu> <fo> <mr> <addr> <type> <scts> <dt> <st> service centre address followed by GSM 03.40 Protocol Data Unit in hexadecimal format first octet of SMS-STATUS-REPORT in integer format message reference receiver address type of receiver address, 129 for normal and 145 for international access (number contains + character) service centre time stamp discharge time status
4.8 +CMT Received Message Routing
This response is used to carry a received short message to DTE when direct routing has been activated with the AT+CNMI command. The response +CMT:,<length> <CR><LF><pdu> is used when PDU mode is enabled, and +CMT: <addr>, , <scts>[,<type>, <fo>, <pid>, <dcs>, <sca>, <typesca>, <length>]<CR><LF><data> when text mode is used. <length> length of the actual PDU in octets or length of <data> field <pdu> <addr> <scts> <type> <fo> <pid> <dcs> <sca> service centre address followed by GSM 03.40 Protocol Data Unit in hexadecimal format originator address service centre time stamp type of originator address, 129 for normal and 145 for international access (number contains + character) first octet of SMS-DELIVER in integer format protocol identifier in integer format SMS Data Coding Scheme service centre address for international access (number contains + character)
<typesca> type of service centre address, 129 for normal and 145
4.9 +CDS Received Status Report Routing
This response is used to carry a received short message status report to the DTE when direct routing has been activated with the AT+CNMI command. The response +CDS:<length><CR><LF><pdu> is used when PDU mode is enabled, and +CDS: <fo>,<mr>,[<addr>], [<type>], <scts>,<dt>,<st> when text mode is used. <length> length of the actual PDU in octets

<pdu> <fo> <mr> <addr> <type> <scts> <dt> <st>
service centre address followed by GSM 03.40 Protocol Data Unit in hexadecimal format first octet of SMS-STATUS-REPORT in integer format message reference receiver address type of receiver address, 129 for normal and 145 for international access (number contains + character) service centre time stamp discharge time status

5. Abbreviations

CTS DCD DCE DSR DTE DTR ME RTS TA TE
Clear To Send. Data Carrier Detect. Data Circuit-Terminating Equipment, i.e. here the Data adapter. Data Set Ready. Data Terminal Equipment (see also TE below). Data Terminal Ready. Mobile Equipment, which in most cases is a mobile phone. Request To Send. Terminal Adapter. Terminal Equipment, which in most cases is a computer.