AT Command总结

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AT Command
· Abbreviations
CTS Clear To Send.
DCD Data Carrier Detect.
DCE Data Circuit-Terminating Equipment, i.e., here the Data Card.
DSR Data Set Ready.
DTE Data Terminal Equipment (see also TE below).
DTR Data Terminal Ready.
ME Mobile Equipment, which in most cases is a mobile phone.
RTS Request To Send.
TA Terminal Adapter.
TE Terminal Equipment, which in most cases is a computer.
· Syntax of AT+ Commands
When you want to select, display or assign a value for a setting, 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.
· Help on AT Commands
To get general Help on the AT commands supported by the data card,
type: AT? or AT?0.
To get Help on a functional group of AT commands
type: AT?n (n= the number of the group).

· AT Commands
1. Call Control
ATA Answer Command
ATD Dial Command
ATH Hang Up Call
ATL Monitor Speaker Loudness
ATM Monitor Speaker Mode
ATO Go On-Line
ATP Set Pulse Dial as Default
ATT Set Tone Dial as Default
AT+CSTA Select Type of Address
AT+CRC Cellular Result Codes
2. Data Card Control
ATI Identification
ATS Select a S-register
ATZ Recall stored profile
AT&F Restore Factory Settings
AT&V View Active Configuration
AT&W Store Parameters in Given Profile
AT&Y Select Set as s Powerup Option
AT+CLCK Facility Lock Command
AT+COLP Connected Line Identification Presentation
AT+GCAP Request Complete Capabilities List
AT+GMI Request Manufacturer Identification
AT+GMM Request Model Identification
AT+GMR Request Revision Identification
AT+GSN Request Product Serial Number Identification
3. Phone Control Commands
AT+CBC Battery Charge
AT+CGMI Request Manufacturer Identification
AT+CGMM Request Model Identification
AT+CGMR Request Revision Identification
AT+CGSN Request Product Serial Number Identification
AT+CMEE Report Mobile Equipment Error
AT+CPAS Phone Activity Status
AT+CPBF Find Phone Book Entries
AT+CPBR Read Phone Book Entry
AT+CPBS Select Phone Book Memory Storage
AT+CPBW Write Phone Book Entry
AT+CSCS Select TE Character Set
AT+CSQ Signal Quality
4. Computer Data Card Interface Commands
ATE Command Echo
ATQ Result Code Suppression
ATV Define Response Format
ATX Response Range Selection
AT&C Define DCD Usage
AT&D Define DTR Usage
AT&K Select Flow Control
AT&Q Define Communications Mode Option
AT&S Define DSR Option
AT+ICF DTE-DCE Character Framing
AT+IFC DTE-DCE Local Flow Control
AT+IPR Fixed DTE Rate
5. Reporting Options Commands
AT+CLIP Calling Line Identification Presentation
AT+CR Service Reporting Control
AT+DR Data Compression Reporting
AT+ILRR DTE-DCE Local Rate Reporting
6. Network Communication Parameter Commands
ATB Communications Standard Option
AT+CBST Select Bearer Service Type
AT+CEER Extended Error Report
AT+CRLP Radio Link Protocol
AT+DS Data Compression
7. Miscellaneous Commands
A/ Re-Execute Command Line
AT? Command Help
AT*C Start SMS Interpreter
AT*T Enter SMS Block Mode Protocol
AT*V Activate V.25bis Mode
AT*NOKIATEST Test Command
AT+CESP Enter SMS Block Mode Protocol
8. SMS Commands
SMS Text Mode
AT+CSMS Select Message Service
AT+CPMS Preferred Message Storage
AT+CMGF Message Format
AT+CSCA Service Centre Address
AT+CSMP Set Text Mode Parameters
AT+CSDH Show Text Mode Parameters
AT+CSCB Select Cell Broadcast Message Types
AT+CSAS Save Settings
AT+CRES Restore Settings
AT+CNMI New Message Indications to TE
AT+CMGL List Messages
AT+CMGR Read Message
AT+CMGS Send Message
AT+CMSS Send Message from Storage
AT+CMGW Write Message to Memory
AT+CMGD Delete Message
SMS PDU Mode
AT+CMGL List Messages
AT+CMGR Read Message
AT+CMGS Send Message
AT+CMGW Write Message to Memory

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· Responses in AT Command Mode
+CMS ERROR Message Service Failure Result Code
The final result code +CMS ERROR: <err> indicates an error related to mobile equipment or the network. The operation is similar to the ERROR result code. None of the following commands in the same command line is executed. Neither the ERROR nor OK result code shall be returned. ERROR is returned normally when the error is related to syntax or invalid parameters.
Defined Values
<err> values used by common messaging commands:
300 ME failure
301 SMS service of ME reserved
302 operation not allowed
303 operation not supported
304 invalid PDU mode parameter
305 invalid text mode parameter
310 SIM not inserted
311 SIM PIN necessary
312 PH-SIM PIN necessary
313 SIM failure
314 SIM busy
315 SIM wrong
320 memory failure
321 invalid memory index
322 memory full
330 SMSC address unknown
331 no network service
332 network timeout
500 unknown error
...511 other values in range 256...511 are reserved
512... manufacturer specific
+CRING: <type> Extended Format Incoming Call Indication
This is a response of the data card indication of an incoming call if the extended format incoming call indication is selected by the command AT+CRC=1 above.

<type>:
REL ASYNC asynchronous non-transparent data call
FAX facsimile call (TS62)
VOICE normal voice (TS11)
RING Incoming Call Indication
Ring is not a command issued by the user but a response of the data card indicating an incoming call. The numeric (short form) value of the RING response is 2.
+CME ERROR Mobile Equipment Error Result Code
+CRING:<type> Extended Format of Incoming Call Indication
Responses to ATA Command
Long responses / Short responses /
CONNECT / 1 /
CONNECT 1200 / 5 /
CONNECT 2400 / 10 /
CONNECT 4800 / 11 /
CONNECT 9600 / 12 /
Connection established. The digits show the data card connection speed. If no digits follow the CONNECT message, the data card terminal speed is 300 bps, unless the response range has been restricted by an ATX command in which case it could be any speed.
NO CARRIER / 3 /
Connection no longer exists.
ERROR / 4 /
Invalid command.
OK / 0 /
If the command is aborted.
Responses to ATD Command
Long responses / Short responses
BLACKLISTED /14/
Response to dial command which addressed a blacklisted number. See *) below.
BUSY / 7 /
The response to a dial command when the called party is busy.
CARRIER / 16 /
The cellular network carrier RLP is active.
CONNECT / 1 /
CONNECT 1200 / 5 /
CONNECT 2400 / 10 /
CONNECT 4800 / 11 /
CONNECT 9600 / 12 /
Connection established. The digits show the data card connection speed. If no digits follow the CONNECT message, the data card terminal speed is 300 bps, unless the response range has been restricted by an ATX command in which case it could be any speed.
DELAYED / 13 /
The response to a dial command which addressed a delayed number. See *) below.
ERROR / 4 /
Invalid command.
NO ANSWER / 8 /
The response to a dial command when the called party did not answer the call.
NO CARRIER / 3 /
Connection no longer exists.
OK / 0 /
If the command is aborted or if the dial string is terminated by a semicolon character.
*) When the data card tries to reach a number and fails to establish a connection, further attempts will be delayed, i.e., successive attempts to dial the same number will be rejected for a short period of time, and the response DELAYED will be displayed. The delay period only lasts for a few seconds at first, however, if you continue to try to get the call through and fail, the delay will be prolonged for a few minutes. Finally, the called number will be included on a list of so-called blacklisted numbers. The response BLACKLISTED will be seen on the screen. The data card will not accept any new attempts to that number before you press any key on the cellular phone keypad. This user action erases the number from the list and enables you to call the number again. The purpose of blacklisting numbers is to conserve the network's resources.
Responses to ATO Command
Long responses / Short responses
CONNECT / 1 /
CONNECT 1200 / 5 /
CONNECT 2400 / 10 /
CONNECT 4800 / 11 /
CONNECT 9600 / 12 /
Connection is succesfully resumed. The digits show the data card terminal speed. If no digits follow the CONNECT message, the data card terminal speed is 300 bps, unless the response range has been restricted by an ATX command in which case it could be any speed.
NO CARRIER / 3 /
Connection is not successfully resumed.
ERROR / 4 /
Invalid command.
OK / 0 /
If the command is aborted.

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