Quectel EC25 series Installation instructions

EC25&EC21
AT Commands Manual
LTE Module Series
Rev. EC25&EC21_AT_Commands_Manual_V1.2
Date: 2017-11-14
Status: Released
www.quectel.com

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About the Document
History
Revision
Date
Author
Description
1.0
2016-05-30
James CAI/
Bonnie ZHAO
Initial
1.1
2017-01-18
Ivan ZHANG/
Sophie ZHU
1. Added the following AT commands:
+QRIR/+QINDCFG/+QINISTAT/+QLTS/+QSPN/
+QHUP/+QEEC/+QSIDET/+QMIC/+QRXGAIN/
+QIIC/+QADC
2. Added AT+QCFG commands shown as below:
"urc/ri/ring"/"urc/ri/smsincoming"/"urc/ri/other"/"risig
naltype"/"urc/delay"/"urc/cache"
3. Updated the description for <Act> parameter in
AT+COPS command: added the value 100 which
indicates CDMA network
1.2
2017-11-14
Jessica GENG
1. Added commands AT+QTONEDET, AT+QLDTMF,
AT+QLTONE and AT+QCFG=“tone/incoming”
2. Updated the description of parameter <ci> in
commands AT+CREG, AT+CGREG and
AT+CEREG
3. Deleted command AT+QCFG="tdscsq" and the
description of +QURCCFG? in command
AT+QURCCFG
4. Updated the description of commands
AT+QUCCFG, AT+CTZU, AT+QDAI, AT+QEEC,
AT+QIIC and AT+QCFG="band"
5. Updated the examples of commands AT+QIIC and
AT+COPS
6. Deleted some related information about CDMA
7. Updated the supported baud rates of command
AT+IPR

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Contents
About the Document................................................................................................................................ 2
Contents.................................................................................................................................................... 3
Table Index ............................................................................................................................................... 8
1Introduction....................................................................................................................................... 9
1.1. Scope of the Document........................................................................................................... 9
1.2. AT Command Syntax ..............................................................................................................9
1.3. Supported Character Sets.....................................................................................................10
1.4. AT Command Interface ......................................................................................................... 10
1.5. Unsolicited Result Code........................................................................................................10
1.6. Turn off Procedure .................................................................................................................11
2General Commands ........................................................................................................................ 12
2.1. ATI Display Product Identification Information.................................................................... 12
2.2. AT+GMI Request Manufacturer Identification.....................................................................13
2.3. AT+GMM Request TA Model Identification.........................................................................13
2.4. AT+GMR Request TA Revision Identification of Software Release ....................................14
2.5. AT+CGMI Request Manufacturer Identification.................................................................. 14
2.6. AT+CGMM Request Model Identification............................................................................ 15
2.7. AT+CGMR Request TA Revision Identification of Software Release.................................. 15
2.8. AT+GSN Request International Mobile Equipment Identity (IMEI) .....................................16
2.9. AT+CGSN Request Product Serial Number Identification.................................................. 17
2.10. AT&F Set all Current Parameters to Manufacturer Defaults............................................... 17
2.11. AT&V Display Current Configuration .................................................................................. 18
2.12. AT&W Store Current Parameters to User Defined Profile...................................................19
2.13. ATZ Set all Current Parameters to User Defined Profile..................................................... 19
2.14. ATQ Set Result Code Presentation Mode .......................................................................... 20
2.15. ATV TA Response Format.................................................................................................. 20
2.16. ATE Set Command Echo Mode.......................................................................................... 22
2.17. A/ Repeat Previous Command Line ...................................................................................22
2.18. ATS3 Set Command Line Termination Character...............................................................23
2.19. ATS4 Set Response Formatting Character ........................................................................24
2.20. ATS5 Set Command Line Editing Character ......................................................................24
2.21. ATX Set CONNECT Result Code Format and Monitor Call Progress ................................25
2.22. AT+CFUN Set Phone Functionality ....................................................................................26
2.23. AT+CMEE Error Message Format...................................................................................... 27
2.24. AT+CSCS Select TE Character Set....................................................................................28
2.25. AT+QURCCFG Configure URC Indication Option.............................................................. 29
3Serial Interface Control Commands .............................................................................................. 31
3.1. AT&C Set DCD Function Mode .......................................................................................... 31
3.2. AT&D Set DTR Function Mode...........................................................................................31
3.3. AT+IFC Set TE-TA Local Data Flow Control....................................................................... 32

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3.4. AT+ICF Set TE-TA Control Character Framing................................................................... 33
3.5. AT+IPR Set TE-TA Fixed Local Rate..................................................................................34
3.6. AT+QRIR Restore RI Behavior to Inactive.......................................................................... 35
4Status Control Commands............................................................................................................. 37
4.1. AT+CPAS Mobile Equipment Activity Status....................................................................... 37
4.2. AT+CEER Extended Error Report ......................................................................................38
4.3. AT+QCFG Extended Configuration Settings ......................................................................39
4.3.1. AT+QCFG="gprsattach" GPRS Attach Mode Configuration...................................... 40
4.3.2. AT+QCFG="nwscanmode" Network Search Mode Configuration............................. 41
4.3.3. AT+QCFG="nwscanseq" Network Searching Sequence Configuration.................... 42
4.3.4. AT+QCFG="roamservice" Roam Service Configuration........................................... 43
4.3.5. AT+QCFG="servicedomain" Service Domain Configuration..................................... 43
4.3.6. AT+QCFG="band" Band Configuration.....................................................................44
4.3.7. AT+QCFG="hsdpacat" HSDPA Category Configuration ...........................................46
4.3.8. AT+QCFG="hsupacat" HSUPA Category Configuration ........................................... 46
4.3.9. AT+QCFG="rrc" RRC Release Version Configuration.............................................. 47
4.3.10. AT+QCFG="sgsn" UE SGSN Release Version Configuration ..................................48
4.3.11. AT+QCFG="msc" UE MSC Release Version Configuration...................................... 48
4.3.12. AT+QCFG="PDP/duplicatechk" Establish Multi PDNs with the Same APN.............. 49
4.3.13. AT+QCFG="urc/ri/ring" RI Behavior When RING URC is Presented........................ 50
4.3.14. AT+QCFG="urc/ri/smsincoming" RI Behavior When Incoming SMS URCs are
Presented................................................................................................................................... 52
4.3.15. AT+QCFG="urc/ri/other" RI Behavior When Other URCs are Presented ................. 53
4.3.16. AT+QCFG="risignaltype" RI Signal Output Carrier...................................................53
4.3.17. AT+QCFG="urc/delay" Delay URC Indication...........................................................54
4.3.18. AT+QCFG="urc/cache" URC Cache Function..........................................................55
4.3.19. AT+QCFG="tone/incoming" Ring tone Function....................................................... 56
4.4. AT+QINDCFG URC Indication Configuration..................................................................... 57
5(U)SIM Related Commands ............................................................................................................ 60
5.1. AT+CIMI Request International Mobile Subscriber Identity (IMSI)...................................... 60
5.2. AT+CLCK Facility Lock....................................................................................................... 61
5.3. AT+CPIN Enter PIN............................................................................................................63
5.4. AT+CPWD Change Password............................................................................................65
5.5. AT+CSIM Generic (U)SIM Access...................................................................................... 66
5.6. AT+CRSM Restricted (U)SIM Access.................................................................................67
5.7. AT+QCCID Show ICCID..................................................................................................... 68
5.8. AT+QPINC Display PIN Remainder Counter......................................................................69
5.9. AT+QINISTAT Query Initialization Status of (U)SIM Card................................................... 70
5.10. AT+QSIMDET (U)SIM Card Detection................................................................................ 70
5.11. AT+QSIMSTAT (U)SIM Card Insertion Status Report.........................................................71
6Network Service Commands.......................................................................................................... 74
6.1. AT+COPS Operator Selection............................................................................................74
6.2. AT+CREG Network Registration ........................................................................................ 76

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6.3. AT+CSQ Signal Quality Report .......................................................................................... 78
6.4. AT+CPOL Preferred Operator List......................................................................................79
6.5. AT+COPN Read Operator Names......................................................................................81
6.6. AT+CTZU Automatic Time Zone Update............................................................................ 81
6.7. AT+CTZR Time Zone Reporting......................................................................................... 82
6.8. AT+QLTS Obtain the Latest Time Synchronized Through Network....................................84
6.9. AT+QNWINFO Query Network Information........................................................................85
6.10. AT+QSPN Display the Name of Registered Network ......................................................... 87
7Call Related Commands................................................................................................................. 89
7.1. ATA Answer an Incoming Call.............................................................................................89
7.2. ATD Mobile Originated Call to Dial a Number ....................................................................90
7.3. ATH Disconnect Existing Connection.................................................................................92
7.4. AT+CVHU Voice Hang up Control...................................................................................... 92
7.5. AT+CHUP Hang up Call ..................................................................................................... 93
7.6. +++ Switch from Data Mode to Command Mode................................................................ 93
7.7. ATO Switch from Command Mode to Data Mode............................................................... 94
7.8. ATS0 Set Number of Rings before Automatically Answering Call....................................... 95
7.9. ATS6 Set Pause before Blind Dialing.................................................................................96
7.10. ATS7 Set Time to Wait for Connection Completion ............................................................96
7.11. ATS8 Set the Time to Wait for Comma Dial Modifier..........................................................97
7.12. ATS10 Set Disconnection Delay after Indicating the Absence of Data Carrier ...................98
7.13. AT+CBST Select Bearer Service Type ............................................................................... 98
7.14. AT+CSTA Select Type of Address .................................................................................... 101
7.15. AT+CLCC List Current Calls of ME .................................................................................. 101
7.16. AT+CR Service Reporting Control.................................................................................... 103
7.17. AT+CRC Set Cellular Result Codes for Incoming Call Indication..................................... 104
7.18. AT+CRLP Select Radio Link Protocol Parameter............................................................. 105
7.19. AT+QECCNUM Configure Emergency Call Numbers ...................................................... 106
7.20. AT+QHUP Hang up Call with a Specific Release Cause.................................................. 108
8Phonebook Commands................................................................................................................ 110
8.1. AT+CNUM Subscriber Number .........................................................................................110
8.2. AT+CPBF Find Phonebook Entries ...................................................................................111
8.3. AT+CPBR Read Phonebook Entries .................................................................................112
8.4. AT+CPBS Select Phonebook Memory Storage.................................................................113
8.5. AT+CPBW Write Phonebook Entry....................................................................................114
9Short Message Service Commands ............................................................................................ 116
9.1. AT+CSMS Select Message Service ..................................................................................116
9.2. AT+CMGF Message Format..............................................................................................117
9.3. AT+CSCA Service Center Address....................................................................................118
9.4. AT+CPMS Preferred Message Storage.............................................................................119
9.5. AT+CMGD Delete Message............................................................................................. 121
9.6. AT+CMGL List Messages................................................................................................. 122
9.7. AT+CMGR Read Message...............................................................................................125

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9.8. AT+CMGS Send Message ...............................................................................................129
9.9. AT+CMMS More Messages to Send ................................................................................131
9.10. AT+CMGW Write Message to Memory............................................................................. 132
9.11. AT+CMSS Send Message from Storage .......................................................................... 134
9.12. AT+CNMA New MessageAcknowledgement to UE/TE....................................................135
9.13. AT+CNMI SMS Event Reporting Configuration................................................................ 137
9.14. AT+CSCB Select Cell Broadcast Message Types............................................................ 139
9.15. AT+CSDH Show SMS Text Mode Parameters ................................................................. 140
9.16. AT+CSMP Set SMS Text Mode Parameters..................................................................... 141
9.17. AT+QCMGS Send Concatenated Messages....................................................................142
9.18. AT+QCMGR Read Concatenated Messages................................................................... 144
10 Packet Domain Commands.......................................................................................................... 146
10.1. AT+CGATT Attachment or Detachment of PS..................................................................146
10.2. AT+CGDCONT Define PDP Context................................................................................ 147
10.3. AT+CGQREQ Quality of Service Profile (Requested) ...................................................... 148
10.4. AT+CGQMIN Quality of Service Profile (Minimum Acceptable)........................................ 151
10.5. AT+CGEQREQ 3G Quality of Service Profile (Requested)..............................................154
10.6. AT+CGEQMIN 3G Quality of Service Profile (Minimum Acceptable)................................158
10.7. AT+CGACT Activate or Deactivate PDP Context.............................................................162
10.8. AT+CGDATA Enter Data State.......................................................................................... 163
10.9. AT+CGPADDR Show PDPAddress ................................................................................. 164
10.10. AT+CGCLASS GPRS Mobile Station Class ..................................................................... 165
10.11. AT+CGREG Network Registration Status......................................................................... 166
10.12. AT+CGEREP Packet Domain Event Reporting................................................................ 168
10.13. AT+CGSMS Select Service for MO SMS Messages........................................................ 170
10.14. AT+CEREG EPS Network Registration Status................................................................. 171
10.15. AT+QGDCNT Packet Data Counter ................................................................................. 172
10.16. AT+QAUGDCNT Auto Save Packet Data Counter........................................................... 173
11 Supplementary Service Commands............................................................................................ 175
11.1. AT+CCFC Call Forwarding Number and Conditions Control............................................ 175
11.2. AT+CCWA Call Waiting Control........................................................................................177
11.3. AT+CHLD Call Related Supplementary Services............................................................. 179
11.4. AT+CLIP Calling Line Identification Presentation ............................................................. 181
11.5. AT+CLIR Calling Line Identification Restriction................................................................ 182
11.6. AT+COLP Connected Line Identification Presentation..................................................... 183
11.7. AT+CSSN Supplementary Service Notifications............................................................... 185
11.8. AT+CUSD Unstructured Supplementary Service Data.....................................................186
12 Audio Commands ......................................................................................................................... 188
12.1. AT+CLVL Loudspeaker Volume Level Selection...............................................................188
12.2. AT+CMUT Mute Control................................................................................................... 189
12.3. AT+QAUDLOOP Enable/Disable Audio Loop Test ........................................................... 189
12.4. AT+VTS DTMF and Tone Generation............................................................................... 190
12.5. AT+VTD Set Tone Duration.............................................................................................. 191

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12.6. AT+QAUDMOD Set Audio Mode......................................................................................192
12.7. AT+QDAI DigitalAudio Interface Configuration ................................................................ 193
12.8. AT+QEEC Set Echo Cancellation Parameters................................................................. 195
12.9. AT+QSIDET Set the Side Tone Gain in Current Mode ..................................................... 196
12.10. AT+QMIC Set Uplink Gains of MIC .................................................................................. 197
12.11. AT+QRXGAIN Set Downlink Gains of RX ........................................................................ 198
12.12. AT+QIIC IIC Read & Write................................................................................................199
12.13. AT+QTONEDET Enable/Disable DTMF Detection ......................................................... 200
12.14. AT+QLDTMF Play Local DTMF........................................................................................ 201
12.15. AT+QLTONE Play a Local Customized Tone.................................................................... 202
13 Hardware Related Commands ..................................................................................................... 204
13.1. AT+QPOWD Power off.....................................................................................................204
13.2. AT+CCLK Clock ...............................................................................................................204
13.3. AT+CBC Battery Charge ..................................................................................................205
13.4. AT+QADC Read ADC Value............................................................................................. 206
13.5. AT+QSCLK Enable/Disable Entering into Sleep Mode..................................................... 207
14 Appendix........................................................................................................................................ 208
14.1. References..........................................................................................................................208
14.2. Factory Default Settings Restorable with AT&F ..................................................................209
14.3. AT Command Settings Storable withAT&W.........................................................................211
14.4. AT Command Settings Storable withATZ............................................................................ 212
14.5. Summary of CME ERROR Codes ......................................................................................213
14.6. Summary of CMS ERROR Codes ......................................................................................215
14.7. Summary of URC................................................................................................................ 216
14.8. SMS Character Sets Conversions.......................................................................................219
14.9. Release Cause Text List ofAT+CEER ................................................................................ 225

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Table Index
TABLE 1: TYPES OF AT COMMANDS AND RESPONSES............................................................................. 10
TABLE 2: AT&V RESPONSE............................................................................................................................. 18
TABLE 3: ATV0&ATV1 RESULT CODES NUMERIC EQUIVALENTS AND BRIEF DESCRIPTION................ 21
TABLE 4: PARAMETER CONFIGURATIONS SUPPORTED BYAT+CBST................................................... 100
TABLE 5: DELAY CLASS................................................................................................................................ 151
TABLE 6: RELATED DOCUMENTS................................................................................................................ 208
TABLE 7: TERMS AND ABBREVIATIONS...................................................................................................... 208
TABLE 8: FACTORY DEFAULT SETTINGS RESTORABLE WITH AT&F ...................................................... 209
TABLE 9: AT COMMAND SETTINGS STORABLE WITH AT&W.....................................................................211
TABLE 10: AT COMMAND SETTINGS STORABLE WITH ATZ ..................................................................... 212
TABLE 11: DIFFERENT CODING SCHEMES OF +CME ERROR: <ERR>................................................... 213
TABLE 12: DIFFERENT CODING SCHEMES OF +CMS ERROR: <ERR>................................................... 215
TABLE 13: SUMMARY OF URC ..................................................................................................................... 216
TABLE 14: THE WAY OF SMS TEXT INPUT OR OUTPUT............................................................................ 219
TABLE 15: THE INPUT CONVERSIONS TABLE (DCS=GSM 7 BIT AND AT+CSCS=“GSM”) ...................... 219
TABLE 16: THE OUTPUT CONVERSIONS TABLE (DCS=GSM 7 BITAND AT+CSCS=“GSM”) .................. 220
TABLE 17: GSM EXTENDED CHARACTERS................................................................................................ 221
TABLE 18: THE INPUT CONVERSIONS TABLE (DCS=GSM 7 BIT AND AT+CSCS=“IRA”) ........................ 221
TABLE 19: IRA EXTENDED CHARACTERS.................................................................................................. 222
TABLE 20: THE OUTPUT CONVERSIONS TABLE (DCS=GSM 7 BITAND AT+CSCS=“IRA”) .................... 223
TABLE 21: GSM EXTENDED CHARACTERS................................................................................................ 224
TABLE 22: RELEASE CAUSE TEXT LIST OF AT+CEER .............................................................................. 225

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1Introduction
1.1. Scope of the Document
This document presents the AT Commands Set for Quectel cellular engines EC25 & EC21.
1.2. AT Command Syntax
The “AT”or “at” prefix must be set at the beginning of each command line. To terminate a command line
enter <CR>. Commands are usually followed by a response that includes
“<CR><LF><response><CR><LF>”. Throughout this document, only the responses are presented,
“<CR><LF>” are omitted intentionally.
The AT Commands Set implemented by EC25 & EC21 is a combination of 3GPP TS 27.007, 3GPP TS
27.005 and ITU-T recommendation V.25ter as well as theAT Commands developed by Quectel.
All these AT commands can be split into three categories syntactically: “basic”, “S parameter”, and
“extended”. They are listed as follows:
Basic syntax
These AT commands have the format of “AT<x><n>”, or “AT&<x><n>”, where “<x>” is the command, and
“<n>” is/are the argument(s) for that command. An example of this is “ATE<n>”, which tells the DCE
whether received characters should be echoed back to the DTE according to the value of “<n>”. “<n>” is
optional and a default will be used if it is missing.
S parameter syntax
These AT commands have the format of “ATS<n>=<m>”, where “<n>” is the index of the S register to set,
and “<m>” is the value to assign to it.
Extended syntax
These commands can be operated in several modes, as following table:

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Table 1: Types of AT Commands and Responses
1.3. Supported Character Sets
EC25 & EC21 AT command interface defaults to the GSM character set. EC25 & EC21 modules support
the following character sets:
GSM format
UCS2
IRA
The character set can be configured and interrogated by using the AT+CSCS command (3GPP TS
27.007) and it is defined in 3GPP TS 27.005. The character set affects transmission and reception of SMS
and SMS Cell Broadcast Messages, as well as the entry and display of phone book entries text field.
1.4. AT Command Interface
EC25 & EC21 AT command interface includes two USB ports (USB MODEM port and USB AT port) and
one main UART port. The main UART port and two USB ports support AT command communication and
data transfer.
1.5. Unsolicited Result Code
As an Unsolicited Result Code and a report message, URC is not issued as part of the response related
to an executed AT command. URC is issued by the EC25 & EC21 without being requested by the TE and
it is issued automatically when a certain event occurs. Typical events leading to URCs are incoming calls
(RING), received short messages, high/low voltage alarm, high/low temperature alarm, etc.
Test Command
AT+<x>=?
This command returns the list of parameters and value ranges
set by the corresponding Write Command or internal processes.
Read Command
AT+<x>?
This command returns the currently set value of the parameter
or parameters.
Write Command
AT+<x>=<…>
This command sets the user-definable parameter values.
Execution
Command
AT+<x>
This command reads non-variable parameters affected by
internal processes in the UE.

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1.6. Turn off Procedure
It is recommended to execute AT+QPOWD command to turn off the module, as it is the safest and best
way. This procedure is realized by letting the module log off from the network and allowing the software to
enter into a secure and safe data state before disconnecting the power supply.
After sending AT+QPOWD, do not enter any other AT commands. The module outputs message,
POWERED DOWN and sets the STATUS pin as low to enter into the shutdown state. In order to avoid
data loss, it is suggested to wait for 1s to switch off the VBAT after the STATUS pin is set as low and the
URC POWERED DOWN is outputted. If POWERED DOWN has not been received after 65s, the VBAT
shall be switched off compulsorily.

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2General Commands
2.1. ATI Display Product Identification Information
The command delivers a product information text.
Parameter
Example
ATI
Quectel
EC25
Revision: EC25EFAR02A09M4G
OK
ATIDisplay Product Identification Information
Execution Command
ATI
Response
TA issues product information text.
Quectel
EC2x
Revision: <revision>
OK
Maximum Response Time
300ms
Reference
V.25ter
<revision> Identification text of product software version

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2.2. AT+GMI Request Manufacturer Identification
The command returns a manufacturer identification text. See also AT+CGMI.
2.3. AT+GMM Request TA Model Identification
The command returns a product model identification text. It is identical with AT+CGMM.
AT+GMI Request Manufacturer Identification
Test Command
AT+GMI=?
Response
OK
Execution Command
AT+GMI
Response
TA reports one or more lines of information text which permit
the user to identify the manufacturer.
Quectel
OK
Maximum Response Time
300ms
Reference
V.25ter
AT+GMM Request TA Model Identification
Test Command
AT+GMM=?
Response
OK
Execution Command
AT+GMM
Response
TA returns a product model identification text.
EC2x
OK
Maximum Response Time
300ms
Reference
V.25ter

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2.4. AT+GMR Request TA Revision Identification of Software Release
The command delivers a product firmware version identification text. It is identical with AT+CGMR.
Parameter
Example
AT+GMR
EC25EFAR02A09M4G
OK
2.5. AT+CGMI Request Manufacturer Identification
The command returns a manufacturer identification text. See also AT+GMI.
AT+GMR Request TA Revision Identification of Software Release
Test Command
AT+GMR=?
Response
OK
Execution Command
AT+GMR
Response
TA reports one or more lines of information text which permit
the user to identify the revision of software release.
<revision>
OK
Maximum Response Time
300ms
Reference
V.25ter
<revision> Identification text of product software version
AT+CGMI Request Manufacturer Identification
Test Command
AT+CGMI=?
Response
OK
Execution Command
AT+CGMI
Response
TA returns manufacturer identification text.
Quectel

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2.6. AT+CGMM Request Model Identification
The command returns a product model identification text. It is identical with AT+GMM.
2.7. AT+CGMR Request TA Revision Identification of Software Release
The command delivers a product firmware version identification text. It is identical with AT+GMR.
OK
Maximum Response Time
300ms
Reference
3GPP TS 27.007
AT+CGMM Request Model Identification
Test Command
AT+CGMM=?
Response
OK
Execution Command
AT+CGMM
Response
TA returns product model identification text.
EC2x
OK
Maximum Response Time
300ms
Reference
3GPP TS 27.007
AT+CGMR Request TA Revision Identification of Software Release
Test Command
AT+CGMR=?
Response
OK
Execution Command
AT+CGMR
Response
TA returns identification text of product software version.
<revision>
OK
Maximum Response Time
300ms
Reference
3GPP TS 27.007

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Parameter
2.8. AT+GSN Request International Mobile Equipment Identity (IMEI)
The command returns the International Mobile Equipment Identity (IMEI) number of ME. It is identical with
AT+CGSN.
Parameter
The serial number (IMEI) varies with the individual ME device.
<revision> Identification text of product software version
AT+GSN Request International Mobile Equipment Identity (IMEI)
Test Command
AT+GSN=?
Response
OK
Execution Command
AT+GSN
Response
TA reports the IMEI (International Mobile Equipment Identity)
number in information text which permits the user to identify
the individual ME device.
<IMEI>
OK
Maximum Response Time
300ms
Reference
V.25ter
<IMEI> IMEI of the ME
NOTE

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2.9. AT+CGSN Request Product Serial Number Identification
The command returns International Mobile Equipment Identity (IMEI) number of ME. It is identical with
AT+GSN.
Parameter
The serial number (IMEI) varies with the individual ME device.
2.10. AT&F Set all Current Parameters to Manufacturer Defaults
The command resets AT command settings to their factory default values.
AT+CGSN Request Product Serial Number Identification
Test Command
AT+CGSN=?
Response
OK
Execution Command
AT+CGSN
Response
<IMEI>
OK
Maximum Response Time
300ms
Reference
3GPP TS 27.007
<IMEI> IMEI of the ME
AT&F Set all Current Parameters to Manufacturer Defaults
Execution Command
AT&F[<value>]
Response
TA sets all current parameters to the manufacturer defined
profile. See Table 8.
OK
Maximum Response Time
300ms
Reference
V.25ter
NOTE

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Parameter
2.11. AT&V Display Current Configuration
The command displays the current settings of several AT command parameters, including the single-letter
AT command parameters which are not readable otherwise.
Table 2: AT&V Response
<value> 0 Set all TA parameters to manufacturer defaults
AT&V Display Current Configuration
Execution Command
AT&V
Response
TA returns the current parameter settings. See Table 2.
OK
Maximum Response Time
300ms
Reference
V.25ter
AT&V
&C: 1
&D: 2
&F: 0
&W: 0
E: 1
Q: 0
V: 1
X: 4
Z: 0
S0: 0
S3: 13
S4: 10
S5: 8
S6: 2
S7: 0
S8: 2
S10: 15
OK

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2.12. AT&W Store Current Parameters to User Defined Profile
The command stores the current AT command settings to a user defined profile in non-volatile memory.
Parameter
2.13. ATZ Set all Current Parameters to User Defined Profile
The command restores the current AT command settings to the user defined profile in non-volatile
memory, if one was stored with AT&W before. Any additional AT command on the same command line
may be ignored.
Parameter
AT&W Store Current Parameters to User Defined Profile
Execution Command
AT&W[<n>]
Response
TA stores the current parameter settings in the user defined
profile. See Table 9.
OK
Maximum Response Time
300ms
Reference
V.25ter
<n> 0 Profile number to store current parameters
ATZ Set all Current Parameters to User Defined Profile
Execution Command
ATZ[<value>]
Response
TA sets all current parameters to the user defined profile. See
Table 10.
OK
Maximum Response Time
300ms
Reference
V.25ter
<value> 0 Reset to profile number 0