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AT Commands For Call Control

 

No Command Description
L0501 AT+CVHU Voice hang up control
L0502 AT+CHUP Hang up call
L0503 AT+CBST Select bearer service type
L0504 AT+CRLP Radio link protocol
L0505 AT+CR Service reporting control
L0506 AT+CRC Cellular result codes
L0507 AT+CLCC List current calls
L0508 AT+CEER Extended error report
L0509 AT+CCWA Call waiting
L0510 AT+CHLD Call related supplementary services
L0511 AT+CCFC Call forwarding number and conditions
L0512 AT+CLIP Calling line identification presentation
L0513 AT+CLIR Calling line identification restriction
L0514 AT+COLP Connected line identification presentation
L0515 AT+VTS DTMF and tone generation
L0516 AT+VTD Tone duration
L0517 AT+CSTA Select type of address
L0518 AT+CMOD Call mode
L0519 AT+VMUTE Speaker mute control
L0520 AT+CMUT Microphone mute control
L0521 AT+MORING Enable or disable report MO ring URC
L0522 AT+CLVL Loudspeaker volume level
L0523 AT+SIDET Set sidetone
L0524 AT+CACDBFN Change default ACDB filename
L0525 AT+CPCMREG USB audio control
L0526 AT+CMICGAIN Adjust mic gain
L0527 AT+COUTGAIN Adjust out gain
L0528 AT+CTXVOL Adjust TX voice mic volume
L0529 AT+CTXMICGAIN Adjust TX voice mic gain
L0530 AT+CRXVOL Adjust RX voice output speaker volume
L0531 AT+CECH Inhibit far-end echo
L0532 AT+CECDT Inhibit echo during doubletalk
L0533 AT+CECWB Inhibit echo in the high band
L0534 AT+CNSN MIC NOISE suppression
L0535 AT+CNSLIM MIC NOISE suppression
L0536 AT+CFNSMOD Adjust parameter fnsMode of RX_VOICE_FNS
L0537 AT+CFNSIN Adjust parameter fnsInputGain of RX_VOICE_FNS
L0538 AT+CFNSLVL Adjust parameter fnsTargetNS of RX_VOICE_FNS
L0539 AT+CECRX Enable or disable VOICE_MOD_ENABLE
L0540 AT+CNLPPG Modify the NLPP_gain in DSP
L0541 AT+CNLPPL Modify the NLPP_limit in DSP
L0542 AT+CECM Adjust echo canceller
L0543 AT+CPCMFRM Set usb audio sample rate to 16K bit
L0544 AT+CPTONE Play tone
L0545 AT+CODECCTL Control codec by Host device or Module
L0546 AT+CPCMBANDWIDTH Modify the sampling rate of the PCM
L0547 AT+CSDVC Switch voice channel device

 

 

 

L0501   AT+CVHU     Voice Hang Up Control

Write command selects whether ATH or “drop DTR” shall cause a voice connection to be disconnected or not.

By voice connection is also meant alternating mode calls that are currently in voice mode.

 

T) AT+CVHU=?

+CVHU: (list of supported <mode>s)

OK

R) AT+CVHU?

+CVHU: <mode>

OK

W) AT+CVHU=<mode>

a) If successfully:

OK

b) If failed:

ERROR

E) AT+CVHU OK
Maximum Response Time 120000ms

 

<mode>

0     “Drop DTR” ignored but OK response given. ATH disconnects.

1     “Drop DTR” and ATH ignored but OK response given.

 

Example

AT+CVHU=0

OK

 

AT+CVHU?

+CVHU: 0

OK

 

 

 

L0502   AT+CHUP     Hang Up Call

This command is used to cancel voice calls.

If there is no call, it will do nothing but OK response is given.

After running AT+CHUP, multiple “VOICE CALL END: ” may be reported which relies on how many calls exist before calling this command.

 
T) AT+CHUP=? OK
E) AT+CHUP

VOICE CALL: END: <time>

[…VOICE CALL: END: <time>]

OK

No call:

OK

Maximum Response Time 120000ms

 

<time>

Voice call connection time.

Format     HHMMSS (HH: hour, MM: minute, SS: second)

 

Example

AT+CHUP

VOICE CALL:END: 000017

OK

 

 

 

L0503   AT+CBST     Select Bearer Service Type

Write command selects the bearer service <name> with data rate <speed>, and the connection element

<ce> to be used when data calls are originated.

Values may also be used during mobile terminated data call setup, especially in case of single numbering scheme calls.

 

T) AT+CBST=?

+CBST: (list of supported <speed>s), (list of supported <name>s), (list of supported <ce>s)

OK

R) AT+CBST?

+CBST: <speed>,<name>,<ce>

OK

W) AT+CBST=<speed>[,<name>[<ce>]]

OK

or

ERROR

E) AT+CBST OK
Maximum Response Time 120000ms

 

<speed>
0      autobauding (automatic selection of the speed;
        this setting is possible in case of 3.1 kHz modem and non-transparent service)
 
7     9600 bps (V.32)
 
12     9600 bps (V.34)
 
14     14400 bps(V.34)
 
16     28800 bps(V.34)
 
17     33600 bps(V.34)
 
39     9600 bps(V.120)
 
43     14400 bps(V.120)
 
48     28800 bps(V.120)
 
51     56000 bps(V.120)
 
71     9600 bps(V.110)
 
75     14400 bps(V.110)
 
80     28800 bps(V.110 or X.31 flag stuffing)
 
81     38400 bps(V.110 or X.31 flag stuffing)
 
83     56000 bps(V.110 or X.31 flag stuffing)
 
84     64000 bps(X.31 flag stuffing)
 
116     64000 bps(bit transparent)
 
134     64000 bps(multimedia)
<name>

0    Asynchronous modem

1     Synchronous modem

4    data circuit asynchronous (RDI)

<ce>

0    transparent

1    non-transparent

 

NOTE

If <speed> is set to 116 or 134, it is necessary that <name> is equal to 1 and <ce> is equal to 0.

 

Example

AT+CBST=0,0,1

OK

 

AT+CBST?

+CBST: 0,0,1

OK

 

 

 

 

L0504   AT+CRLP     Radio Link Protocol

Radio Link Protocol(RLP) parameters used when non-transparent data calls are originated may be altered with write command.

Read command returns current settings for each supported RLP version <verX>.

Only RLP parameters applicable to the corresponding <verX> are returned.

Test command returns values supported by the TA as a compound value.

If ME/TA supports several RLP versions <verX>, the RLP parameter value ranges for each <verX> are returned in a separate line.

 

T) AT+CRLP=?

+CRLP: (list of supported <iws>s), (list of supported <mws>s),

(list of supported <T1>s), (list of supported <N2>s)[,<ver1>

[,(list of supported   <T4>s)]][<CR><LF>

 

+CRLP: (list of supported <iws>s), (list of supported<mws>s),

(list of supported <T1>s), (list of supported <N2>s)[,<ver2>

[,(list of supported <T4>s)]][…]]

OK

R) AT+CRLP?

+CRLP: <iws>,<mws>,<T1>,<N2>[,<ver1>[,<T4>]][<CR><LF>

+CRLP:<iws>,<mws>,<T1>,<N2>[,<ver2>[,<T4>]][…]]

OK

W) AT+CRLP=<iws>

[,<mws>[,<T1>[,<N2>

[,<ver>[,<T4>]]]]]

a) if successfully

OK

b) if failed

ERROR

E) AT+CRLP OK
Maximum Response Time 120000ms

 

<ver>,<verX>

RLP version number in integer format, and it can be 0, 1 or 2;

when version indication is not present it shall equal 1.

<iws> IWF to MS window size.
<mws> MS to IWF window size.
<T1> Acknowledgement timer.
<N2> Retransmission attempts.
<T4> Re-sequencing period in integer format.

NOTE: <T1> and <T4> are in units of 10 ms.

Example AT+CRLP?
+CRLP: 61,61,48,6,0
+CRLP: 0,61,48,6,1
+CRLP: 240,240,52,6,2
OK

 

  

 

L0505   AT+CR     Service Reporting Control

Write command controls whether or not intermediate result code “+CR: <serv>” is returned from the TA to the TE.

If enabled, the intermediate result code is transmitted at the point during connect negotiation at

which the TA has determined which speed and quality of service will be used, before any error control or

data compression reports are transmitted, and before the intermediate result code CONNECT is transmitted.

 

T) AT+CR=?

+CR: (list of supported <mode>s)

OK

R) AT+CR?

+CR: <mode>

OK

W) AT+CR=<mode>

a) If successfully

OK

b) If failed

ERROR

E) AT+CR OK
Maximum Response Time 120000ms

 

<mode>

0     disables reporting

1     enables reporting

<serv>

ASYNC     asynchronous transparent

SYNC     synchronous transparent

REL ASYNC     asynchronous non-transparent

REL sync     synchronous non-transparent

GPRS [<L2P>]     GPRS

The optional <L2P> proposes a layer 2 protocol to use between the MT and the TE.s

 

Example

AT+CR=1

OK

 

AT+CR?

+CR: 1

OK

 

 

 

 

L0506   AT+CRC     Cellular Result Codes

Write command controls whether or not the extended format of incoming call indication or GPRS network request for PDP context activation is used.

When enabled, an incoming call is indicated to the TE with unsolicited result code “+CRING: <type>” instead of the normal RING.

Test command returns values supported by the TA as a compound value.

 

T) AT+CRC=?

+CRC: (list of supported <mode>s)

OK

R) AT+CRC?

+CRC: <mode>

OK

W) AT+CRC=<mode>

a) If successfully

OK

b) If failed

ERROR

E) AT+CRC OK
Maximum Response Time 120000ms

 

<mode>

0     disable extended format

1     enable extended format

<type>

ASYNC     asynchronous transparent

SYNC     synchronous transparent

REL ASYNC     asynchronous non-transparent

REL SYNC     synchronous non-transparent

FAX     facsimile

VOICE     normal voice

VOICE/XXX voice followed by data(XXX is ASYNC, SYNC, REL ASYNC or REL SYNC)

ALT VOICE/XXX     alternating voice/data, voice first

ALT XXX/VOICE     alternating voice/data, data first

ALT FAX/VOICE     alternating voice/fax, fax first

GPRS     GPRS network request for PDP context activation

 

Example

AT+CRC=1

OK

 

AT+CRC?

+CRC: 1

OK

 

  

 

L0507   AT+CLCC     List Current Calls

This command issued to return list of current calls of ME.

If command succeeds but no calls are available, no information response is sent to TE.

 

T) AT+CLCC=?

+CLCC: (list of supported <n>s)

OK

R) AT+CLCC?

+CLCC: <n>

OK

W) AT+CLCC=<n>

a) If successfully

OK

b) If failed

ERROR

E) AT+CLCC

+CLCC:<id1>,<dir>,<stat>,<mode>,<mpty>[,<number>,<type>[,<alpha>]][<CR><LF>

+CLCC:<id2>,<dir>,<stat>,<mode>,<mpty>[,<number>,<type>[,<alpha>]][…]]

OK

Maximum Response Time 120000ms

 

<n>

0     Don’t report a list of current calls of ME automatically when the current call status changes.

1     Report a list of current calls of ME automatically when the current call status changes.

<idX> Integer type, call identification number, this number can be used in +CHLD command operations.
<dir>

0     mobile originated (MO) call

1     mobile terminated (MT) call

<stat>

State of the call:

0     active

1     held

2     dialing (MO call)

3     alerting (MO call)

4     incoming (MT call)

5     waiting (MT call)

6     disconnect

<mode>

bearer/teleservice:

0     voice

1     data

2     fax

9     unknown

<mpty>

0     call is not one of multiparty (conference) call parties

1     call is one of multiparty (conference) call parties

<number> String type phone number in format specified by <type>.
<type>

Type of address octet in integer format;

128     Restricted number type includes unknown type and format

145     International number type

161     national number.The network support for this type is optional

177     network specific number,ISDN format

129     Otherwise

<alpha>

String type alphanumeric representation of <number> corresponding to the entry found

in phonebook; used character set should be the one selected with command Select TE

Character Set AT+CSCS.

 

Example

ATD10011;

OK

 

AT+CLCC

+CLCC: 1,0,0,0,0,”10011″,129,”sm”

OK

 RING (with incoming call)

 AT+CLCC

+CLCC: 1,1,4,0,0,”02152063113″,128,”gongsi”

OK

 

  

 

L0508   AT+CEER     Extended Error Report

Execution command causes the TA to return the information text <report>, which should offer the user of the TA an extended report of the reason for:

1   The failure in the last unsuccessful call setup(originating or answering) or in-call modification.

2   The last call release.

3   The last unsuccessful GPRS attach or unsuccessful PDP context activation.

The last GPRS detach or PDP context deactivation.

 

T) AT+CEER=? OK
E) AT+CEER

+CEER:<report>

OK

Maximum Response Tim 120000ms

 

<report> Wrong information which is possibly occurred.

 

Example

AT+CEER

+CEER: Invalid/incomplete number

OK

 

  

 

L0509   AT+CCWA     Call Waiting

This command allows control of the Call Waiting supplementary service. Activation, deactivation and status query are supported.

When querying the status of a network service (<mode>=2)

the response line for ‘not active’ case (<status>=0) should be returned only if service is not active for any <class>.

Parameter <n> is used to disable/enable the presentation of an unsolicited result code +CCWA:

<number>,<type>,<class> to the TE when call waiting service is enabled.

Command should be abortable when network is interrogated.

 

T) AT+CCWA=?

+CCWA: (list of supported <n>s)

OK

R) AT+CCWA?

+CCWA: <n>

OK

W) AT+CCWA=<n>[,<mode>[,<class>]]

a) If successfully

When <mode>=2 and command successful:

+CCWA:<status>,<class>[<CR><LF>

+CCWA: <status>, <class>[…]]

OK

b) If failed

ERROR

E) AT+CCWA OK
Maximum Response Time 120000ms

 

<n>

Sets/shows the result code presentation status in the TA

0     disable

1     enable

<mode>

When <mode> parameter is not given, network is not interrogated:

0     disable

1     enable

2     query status

<class>

It is a sum of integers each representing a class of information (default 7)

1     voice (telephony)

2     data (refers to all bearer services)

4     fax (facsimile services)

7     voice,data and fax(1+2+4)

8     short message service

16     data circuit sync

32     data circuit async

64     dedicated packet access

128     dedicated PAD access

255     The value 255 covers all classes

<status>

0     not active

1     active

<number> String type phone number of calling address in format specified by <type>.
<type>

Type of address octet in integer format;

128     Restricted number type includes unknown type and format

145     International number type

129     Otherwise

 

Example

AT+CCWA=?

+CCWA:(0-1)

OK

 

AT+CCWA?

+CCWA: 0

OK

 

 

 

 

L0510   AT+CHLD     Call Related Supplementary Services

This command allows the control the following call related services:

1.  A call can be temporarily disconnected from the ME but the connection is retained by then networks.

2.  the Multiparty conversation (conference calls).

3.  The served subscriber who has two calls (one held and the other either active or alerting) can connect

the other parties and release the served subscriber’s own connection.

Calls can be put on hold, recovered, released, added to conversation, and transferred.

This is based on the GSM/UMTS supplementary services.

 

T) AT+CHLD=?

+CHLD: (List of supported <n>s)

OK

W) AT+CHLD=<n>

OK

or

ERROR

E) AT+CHLD

Default to <n>=2.

OK

or

ERROR

or

+CME ERROR: <err>

Parameter Saving Mode NO_SAVE

 

<n>

0     Terminate all held calls; or set User Determined User Busy for a waiting call

1     Terminate all active calls and accept the other call (waiting call or held call)

1X     Terminate a specific call X

2     Place all active calls on hold and accept the other call (waiting call or held call) as the active call

2X     Place all active calls except call X on hold

3     Add the held call to the active calls

4     Connect two calls and cut off the connection between users and them simultaneously

 

Example

AT+CHLD=?

+CHLD: (0,1,1x,2,2x,3,4)

OK

 

  

 

L0511   AT+CCFC     Call Forwarding Number And Conditions

This command allows control of the call forwarding supplementary service.

Registration, erasure, activation, deactivation, and status query are supported.

 

T) AT+CCFC=?

+CCFC: (list of supported <reason>s)

OK

W) AT+CCFC=<reason>,<mode

>[,<number>[,<type>[,<clas

s>[,<subaddr>[,<satype>[,<time> ]]]]]]

When <mode>=2 and command successful:

+CCFC: <status>,<class1>[,<number>,<type>

[,<subaddr>,<satype>[,<time>]]][<CR><LF>

+CCFC: <status>,<class2>[,<number>,<type>

[,<subaddr>,<satype>[,<time>]]][…]]

OK

 

When <mode>=2 and command successful:

OK

or

ERROR

or

+CME ERROR:<err>

Parameter Saving Mode NO_SAVE

 

<reason>

0    unconditional

1    mobile busy

2    no reply

3    not reachable

4    all call forwarding

5    all conditional call forwarding

<mode>

0    disable

1    enable

2    query status

3    registration

4    erasure

<number>

String type phone number of forwarding address in format specified by

<type>.

<type>

Type of address octet in integer format:

145     dialing string <number> includes international access code  character ‘+’

129     otherwise

<subaddr> String type sub address of format specified by <satype>. Subaddr length is 0-19
<satype> Type of sub address octet in integer format, default 128.
<classX>

It is a sum of integers each representing a class of information (default 7):

1     voice (telephony)

2     data (refers to all bearer services)

4     fax (facsimile services)

16     data circuit sync

32     data circuit async

64     dedicated packet access

128     dedicated PAD access

255     The value 255 covers all classes

<time>

1…30 – The parameter is set multiple of 5. When “no reply” is enabled or queried,

this gives the time in seconds to wait before call is forwarded, default value 20.

<status>

0     not active

1     active

 

Example

AT+CCFC=?

+CCFC: (0,1,2,3,4,5)

OK

AT+CCFC=0,2

+CCFC: 0,255

OK

  

 

 

L0512   AT+CLIP     Calling Line Identification Presentation

This command refers to the GSM/UMTS supplementary service CLIP (Calling Line Identification

Presentation) that enables a called subscriber to get the calling line identity (CLI) of the calling party when receiving a mobile terminated call.

Write command enables or disables the presentation of the CLI at the TE.

It has no effect on the execution of the supplementary service CLIP in the network.

When the presentation of the CLI at the TE is enabled (and calling subscriber allows), +CLIP:

<number>,<type>,,[,[<alpha>][,<CLI validity>]] response is returned after every RING (or +CRING: <type>;

refer sub clause “Cellular result codes +CRC”) result code sent from TA to TE.

It is manufacturer specific if this response is used when normal voice call is answered.

 

T) AT+CLIP=?

+CLIP: (list of supported <n>s)

OK

R) AT+CLIP?

+CLIP: <n>,<m>

OK

or

ERROR

or

+CME ERROR: <err>

W) AT+CLIP=<n>

OK

or

ERROR

E) AT+CLIP

Set default value(<n>=0):

OK

Parameter Saving Mode NO_SAVE

 

<n>

Parameter sets/shows the result code presentation status in the TA:

0     disable

1     enable

<m>

0     CLIP not provisioned

1     CLIP provisioned

2     unknown (e.g. no network, etc.)

<number> String type phone number of calling address in format specified by <type>
<type>

Type of address octet in integer format;

128     Restricted number type includes unknown type and format

145     International number type

161     national number. The network support for this type is optional

177     network specific number, ISDN format

129     Otherwise

<alpha>

String type alphanumeric representation of <number> corresponding

to the entry found in phone book.

<CLI validity>

0     CLI valid

1     CLI has been withheld by the originator

2     CLI is not available due to interworking problems or limitations of originating network

 

Example

AT+CLIP=1

OK

RING (with incoming call)

+CLIP: “02152063113”,128,,,”gongsi”,0

 

 

 

L0513   AT+CLIR     Calling Line Identification Restriction

This command refers to CLIR service that allows a calling subscriber to enable or disable the presentation

of the CLI to the called party when originating a call.

Write command overrides the CLIR subscription (default is restricted or allowed) when temporary mode is

provisioned as a default adjustment for all following outgoing calls.

This adjustment can be revoked by using the opposite command..

If this command is used by a subscriber without provision of CLIR in permanent mode the network will act.

Read command gives the default adjustment for all outgoing calls (given in <n>), and also triggers an

interrogation of the provision status of the CLIR service (given in <m>).

Test command returns values supported as a compound value.

 

T) AT+CLIR=?

+CLIR: (list of supported <n>s)

OK

R) AT+CLIR?

+CLIR <n>,<m>

OK

or

ERROR

or

+CME ERROR: <err>

W) AT+CLIR=<n>

OK

or

ERROR

or

+CME ERROR: <err>

Parameter Saving Mode NO_SAVE

 

<n>

0    presentation indicator is used according to the subscription of the CLIR service

1    CLIR invocation

2    CLIR suppression

<m>

0    CLIR not provisioned

1    CLIR provisioned in permanent mode

2    unknown (e.g. no network, etc.)

3    CLIR temporary mode presentation restricted

4    CLIR temporary mode presentation allowed

 

Example

AT+CLIR=?

+CLIR:(0-2)

OK

 
 

 

L0514   AT+COLP     Connected Line Identification Presentation

This command refers to the GSM/UMTS supplementary service COLP(Connected Line Identification

Presentation) that enables a calling subscriber to get the connected line identity (COL) of the called party

after setting up a mobile originated call.

The command enables or disables the presentation of the COL at the TE.

It has no effect on the execution of the supplementary service COLR in the network.

When enabled (and called subscriber allows), +COLP:<number>, <type> [,<subaddr>, <satype> [,<alpha>]]

intermediate result code is returned from TA to TE before any +CR responses.

It is manufacturer specific if this response is used when normal voice call is established.

When the AT+COLP=1 is set, any data input immediately after the launching of “ATDXXX;” will stop the

execution of the ATD command, which may cancel the establishing of the call.

 

T) AT+COLP=?

+COLP: (list of supported <n>s)

OK

R) AT+COLP?

+COLP: <n>,<m>

OK

or

ERROR

or

+CME ERROR: <err>

W) AT+COLP =<n>

OK

or

ERROR

or

+CME ERROR: <err>

E) AT+COLP

Set default value(<n>=0, <m>=0):

OK

Parameter Saving Mode NO_SAVE

 

<n>

Parameter sets/shows the result code presentation status in the TA:

0     disable

1     enable

<m>

0     COLP not provisioned

1     COLP provisioned

2     unknown (e.g. no network, etc.)

 

Example

AT+COLP?

+COLP: 1,0

OK

ATD10086;

VOICE CALL: BEGIN

+COLP: “10086”,129,,,

OK

 

 

 

 

L0515   AT+VTS     DTMF And Tone Generation

This command allows the transmission of DTMF tones and arbitrary tones which cause the Mobile Switching

Center (MSC) to transmit tones to a remote subscriber.

The command can only be used in voice mode of operation (active voice call).

NOTE: The END event of voice call will terminate the transmission of tones, and as an operator option,

the tone may be ceased after a pre-determined time whether or not tone duration has been reached.

 

T) AT+VTS=?

+VTS: (list of supported<dtmf>s)

OK

W) AT+VTS=<dtmf> [,<duration>]

AT+VTS=<dtmf-string>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<dtmf> A single ASCII character in the set 0-9, *, #, A, B, C, D.
<duration>

Tone duration in 1/10 seconds, from 0 to 255.

This is interpreted as a DTMF tone of different duration from that mandated by the AT+VTD

command, otherwise, the duration which be set the AT+VTD

command will be used for the tone (<duration> is omitted).

<dtmf-string>

A sequence of ASCII character in the set 0-9, *, #, A, B, C, D, andmaximal length of the string is 29.

The string must be enclosed in double quotes (“”),

and separated by commas between the ASCII characters (e.g. “1,3,5,7,9,*”).

Each of the tones with a duration which

is set by the AT+VTD command.

 

NOTE

The value of <mode> shall be set to zero after a successfully completed alternating mode call.

It shall be set to zero also after a failed answering.

The power-on, factory and user resets shall also set the value to zero.

This reduces the possibility that alternating mode calls are originated or answered accidentally.

 

Example

AT+VTS=1

OK

AT+VTS=1,20

OK

AT+VTS=”1,3,5”

OK

AT+VTS=?

+VTS: (0-9,*,#,A,B,C,D)

OK

 

 

 

L0516   AT+VTD     Tone Duration

This refers to an integer <n> that defines the length of tones emitted as a result of the AT+VTS command.

A value different than zero causes a tone of duration <n>/10 seconds.

 

T) AT+VTD=?

+VTD: (list of supported <n>s)

OK

R) AT+VTD?

+VTD: <n>

OK

W) AT+VTD=<n> OK
Parameter Saving Mode NO_SAVE

 

<n>

Tone duration in integer format, from 0 to 255, and 0 is factory value.

0     Tone duration of every single tone is dependent on the network.

1…255     one duration of every single tone in 1/10 seconds.

 

Example

AT+VTD=?

+VTD: (0-255)

OK

AT+VTD?

+VTD: 0

OK

AT+VTD=5

OK

 

  

 

L0517   AT+CSTA     Select Type Of Address

Write command is used to select the type of number for further dialing commands (ATD) according to

GSM/UMTS specifications. Read command returns the current type of number.

Test command returns values supported by the Module as a compound value.

 

T) AT+CSTA=?

+CSTA:(list of supported <type>s)

OK

R) AT+CSTA?

+CSTA:<type>

OK

W) AT+CSTA=<type>

OK

or

ERROR

E) AT+CSTA OK
Parameter Saving Mode NO_SAVE

 

<type>

Type of address octet in integer format:

145     when dialling string includes international access code character “+”

161     national number.The network support for this type is optional

177     network specific number,ISDN format

129     otherwise

  

NOTE

Because the type of address is automatically detected on the dial string of dialing command, command AT+CSTA has really no effect.

 

Example

AT+CSTA?

+CSTA: 129

OK

AT+CSTA=145

OK

 

  

 

L0518   AT+CMOD     Call Mode

Write command is used to select the type of number for further dialing commands (ATD) according to GSM/UMTS specifications.

Read command returns the current type of number. Test command returns values supported by the Module as a compound value.

 

T) AT+CMOD=?

+CMOD: (list of supported <mode>s)

OK

R) AT+CMOD?

+CMOD: <mode>

OK

W) AT+CMOD=<mode>

OK

or

ERROR

E) AT+CMOD

Set default value:

OK

Parameter Saving Mode NO_SAVE

 

<mode> 0     single mode(only supported)

 

NOTE

The value of <mode> shall be set to zero after a successfully completed alternating mode call.

It shall be set to zero also after a failed The power-on, factory and user resets shall also set the value to zero.

This reduces the possibility that alternating mode calls are originated or answered accidentally.

 

Example

AT+CMOD?

+CMOD: 0

OK

AT+CMOD=0

OK

 

 

 

L0519   AT+VMUTE     Speaker mute control

This command is used to control the loudspeaker to mute and unmute during a voice call or a video call which is connected.

If there is not a connected call, write command can’t be used.

When all calls are disconnected, the Module sets the subparameter as 0 automatically.

 

AT+VMUTE   
T) AT+VMUTE=?

+VMUTE: (list of supported <mode>s)

OK

R) AT+VMUTE?

+VMUTE: <mode>

OK

W) AT+VMUTE=<mode>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<mode>

0           mute off

1           mute on

 

Example AT+VMUTE=1
OKAT+VMUTE?
+VMUTE: 1
OK

 

 

 

L0520   AT+CMUT     Microphone mute control

This command is used to enable and disable the uplink voice muting during a voice call or a video call which is connected.

If there is not a connected call, write command can’t be used.

When all calls are disconnected, the Module sets the subparameter as 0 automatically.

 

T) AT+CMUT=?

+CMUT: (list of supported <mode>s)

OK

R) AT+CMUT?

+CMUT: <mode>

OK

W) AT+CMUT=<mode>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<mode>

0         mute off

1         mute on

 

Example AT+CMUT=1
OKAT+CMUT?
+CMUT: 1

 

OK

 

 

 

L0521   AT+MORING     Enable or disable report MO ring URC

This command is used to enable or disable report MO ring URC

 

T) AT+MORING=?

+MORING: (0-1)

OK

R) AT+MORING?

+MORING: <mode>

OK

W) AT+MORING=<mode>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<mode

0        disable report MO ring URC

1         enable report MO ring URC

 

Example AT+MORING=1
OKAT+MORING?
+MORING: 1
OK

 

AT+MORING=?
+MORING: (0-1)
OK

 

                                                                                                                                                    

 

L0522   AT+CLVL     Loudspeaker volume level

Write command is used to select the volume of the internal loudspeaker audio output of the device.

Read command returns the volume of the internal loudspeaker audio output of the device.

Test command returns supported values as compound value.

 

T) AT+CLVL=?

+CLVL: (range of supported <level>s)

OK

R) AT+CLVL?

+CLVL: <level>

OK

W) AT+CLVL=<level>

OK

or

ERROR

Parameter Saving Mode SAVE

 

<level>

0..5 Integer type value which represents loudspeaker volume level.

The range is from 0 to 5, and 0 represents the lowest loudspeaker volume level,

4 is default factory value.

NOTE: <level> is not saved, and it resets default value when restart.

 

Example

T+CLVL=4

OK

AT+CLVL?

+CLVL: 4

OK

 

 

  

L0523   AT+SIDET     Set Sidetone

This command is used to enable or disable sidetone. Please refer to related hardware design document for more information.
This command is only used after call start

 

T) AT+SIDET=?

+SIDET: (list of supported <value>s)

OK

R) AT+SIDET?

+SIDET: <en>

OK

W) AT+SIDET=<en>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<en> 0    disable sidetone
1    enable sidetone

 

Example AT+SIDET=1
OKAT+SIDET?
+SIDET: 0

 

OK

AT+SIDET=?
+SIDET: (0-1)
OK

 

 

 

L0524   AT+CACDBFN     Change Default ACDB Filename

This command is used to change default acdb filename. But there are six adcd files used by system,
we can’t change default acdb filename to them. These filenames including Bluetooth_cal.acdb, General_cal.acdb,
Global_cal.acdb, Hdmi_cal.acdb, Headset_cal.acdb, Speaker_cal.acdb

 

T) AT+CACDBFN=?

+CACDBFN: (acdb file(s) listed in /data <acdb file>s,except six acdb file used by system)

OK

 

R) AT+CACDBFN?

+CACDBFN: <acdb file>

OK

W) AT+CACDBFN=<acdb file>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<acdb file> file(s) in the directory /data with suffix: acdb, except six acdb file used by system

 

Example AT+CACDBFN=Handset_cal.acdb
OKAT+CACDBFN?
+CACDBFN: Handset_cal.acdb
OK

 

AT+CACDBFN=?
+CACDBFN: (Handset_cal.acdb, Handset_tianmai.acdb)
OK

 

 

 

L0525   AT+CPCMREG     USB Audio Control

This command is used to start/stop usb audio function.

 

T) AT+CPCMREG=?

+CPCMREG: (list of supported <mode>s)

OK

 

R) AT+CPCMREG?

+CPCMREG: <mode>

OK

W) AT+CPCMREG=<mode>[,<s
top>]

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<mode> 0     Stop usb audio function,need used after call stop.
1     Start usb audio function,need used after call start(ATDxxx;)
<stop> 1     Stop usb audio function, need used after call stop. Only used when mode=0;

 

Example

AT+CPCMREG=1

OK

AT+CPCMREG=0,1

OK

AT+CPCMREG?

+CPCMREG: 1

OK

 

 

 

L0526   AT+CMICGAIN     Adjust mic gain

This command is used to adjust mic gain. If this command was used during call,
it will take immediate effect. Otherwise, it will take effect in next call.

T) AT+CTXMICGAIN=?

+CTXMICGAIN: (list of supported <mode><value>s)

OK

R) AT+CTXMICGAIN?

+CTXMICGAIN: <mode><value>

OK

W) AT+CTXMICGAIN=<mode><

value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<value> gain value from 0x0000-0xffff, default value is not a fixed value. It varies with different versions.

 

Example

AT+CMICGAIN=1

OK

AT+CMICGAIN?

+CMICGAIN: 1

OK

 

 

 

L0527   AT+COUTGAIN     Adjust out gain

This command is used to adjust out (speaker/handset) gain. If this command was used during call,

it will take immediate effect. Otherwise, it will take effect in next call.

T) AT+COUTGAIN=?

+COUTGAIN: (list of supported <value>s)

OK

R) AT+COUTGAIN?

+COUTGAIN: <value>

OK

W) AT+COUTGAIN=<value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<value>

Gain value from 0-8, 8 is the max. 8 is the default value.

This value will be reset to default value after Module reset.

 

Example AT+COUTGAIN=1
OK
AT+COUTGAIN?
+COUTGAIN: 1
OK

 

 

 

L0528   AT+CTXVOL    Adjust TX voice mic volume

This command is used to adjust mic gain. It modify the TX_VOICE_VOL in DSP.

This command only be used during call and don’t save the parameter after call.

 

T) AT+CTXVOL=?

+CTXVOL: (range of supported <value>s)

OK

R) AT+CTXVOL?

+CTXVOL: <value>

OK

W) AT+CTXVOL=<value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<value>

Gain value from 0x0000-0xffff, default value is not a fixed value.

It varies with different versions.

 

Example AT+CTXVOL?
+CTXVOL: 0x2d33OK

 

AT+CTXVOL=0x1234
OK

 

 

 

L0529   AT+CTXMICGAIN    Adjust TX voice mic gain

This command is used to adjust mic gain. It modify the TX_VOICE_MIC_GAIN in DSP.

This command only be used during call and don’t save the parameter after call

 

T)AT+CTXMICGAIN=?

+CTXMICGAIN: (list of supported <mode><value>s)

OK

R) AT+CTXMICGAIN?

+CTXMICGAIN: <mode><value>

OK

W)AT+CTXMICGAIN=<mode><

value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<mode> mode value from 0-1, default value is not a fixed value. It varies with different versions.
<value> gain value from 0x0000-0xffff, default value is not a fixed value. It varies with different versions.

 

Example

AT+CTXMICGAIN=1,0×1234

OK

AT+CTXMICGAIN?

+CTXMICGAIN: 1,0×1234

OK

 

  

 

L0530   AT+CRXVOL     Adjust RX voice output speaker volume

This command is used to adjust digital Volume of output signal after speech decoder, before summation of sidetone and DAC.

It modify the RX_VOICE_SPK_GAIN in DSP. This command only be used during call and don’t save the parameter after call.

 

T) AT+CRXVOL=?

+CRXVOL: (list of supported <value>s)

OK

R) AT+CRXVOL?

+CRXVOL: <value>

OK

W) AT+CRXVOL=<value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<value>

Gain value from 0x0000-0xffff, default value is not a fixed value.

It varies with different versions.

 

Example

AT+CRXVOL=0x1234

OK

AT+CRXVOL?

+CRXVOL: 0x1234

OK

 

 

 

L0531   AT+CECH

This command is used to adjust additional muting gain applied in DES during far-end only.

It modify the DENS_gamma_e_high of TX_VOICE_SMECNS in DSP. The bigger the value, the stronger the inhibition.

This command only be used during call and don’t save the parameter after call

 

AT+CECH    Inhibit far-end echo
T) AT+CECH=?

+CECH: (list of supported <value>s)

OK

R) AT+CECH?

+CECH: <value>

OK

W) AT+CECH=<value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<value>

Gain value from 0x0000-0x7fff, default value is not a fixed value.

It varies with different versions.

 

Example

AT+CECH=0x1234

OK

AT+CECH?

+CECH: 0x1234

 

 

 

L0532   AT+CECDT     Inhibit echo during doubletalk

This command is used to adjust additional muting gain applied in DES during doubletalk.

It modify the DENS_gamma_e_dt of TX_VOICE_SMECNS in DSP. The bigger the value, the stronger the inhibition.

This command only be used during call and don’t save the parameter after call.

 

T) AT+CECDT=?

+ECDT: (list of supported <value>s)

OK

R) AT+CECDT?

+CECDT: <value>

OK

W) AT+CECDT=<value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<value>

Gain value from 0x0000-0x7fff, default value is not a fixed value.

It varies with different versions.

 

Example

AT+CECDT=0x1234

OK

AT+CECDT?

+CECDT: 0x1234

OK

 

 

 

L0533   AT+CECWB     Inhibit echo in the high band

This command is used to adjust the aggressiveness of EC in the high band (4 ~ 8 kHz).

A higher value is more aggressive and suppresses more high-band echo.

Q-format — Q4.11WB_gamma_E = 2048 * gammaWhere gamma is in the range [0,15].

It modify the WB_gamma_e of TX_VOICE_SMECNS in DSP. The bigger the value, the stronger the inhibition.

This command only be used during call and don’t save the parameter after call.

 

T) AT+CECWB=?

+CECWB: (list of supported <value>s)

OK

R) AT+CECWB?

+CECWB: <value>

OK

W) AT+CECWB=<value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<value>

Gain value from 0x0000-0x7fff, default value is not a fixed value.

It varies with different versions

 

Example

AT+CECWB=0x1234

OK

AT+CECWB?

+CECWB: 0x1234

OK

 

 

 

L0534   AT+CNSN     MIC NOISE suppression

This command is used to adjust oversubtraction factor and bias compensation for noise estimation.

It modify the DENS_gamma_n of TX_VOICE_SMECNS in DSP. The bigger the value, the stronger the noise suppression.

This command only be used during call and don’t save the parameter after call.

 

T) AT+CNSN=?

+CNSN: (list of supported <value>s)

OK

R) AT+CNSN?

+CNSN: <value>

OK

W) AT+CNSN=<value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<value>

Gain value from 0x0000-0x7fff, default value is not a fixed value.

It varies with different versions

 

Example

AT+CNSN=0x1234

OK

AT+CNSN?

+CNSN: 0x1234

OK

 

 

 

L0535   AT+CNSLIM     MIC NOISE suppression

This command is used to controls the maximum amount of noise suppression.

It modify the DENS_limit_NS of TX_VOICE_SMECNS in DSP. The bigger the value, the stronger the noise suppression.

This command only be used during call and don’t save the parameter after call.

 

T)AT+CNSLIM=?

+CNSLIM: (list of supported <value>s)

OK

R) AT+CNSLIM?

+CNSLIM: <value>

OK

W) AT+CNSLIM=<value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<value>

Gain value from 0x0000-0x7fff, default value is not a fixed value.

It varies with different versions

 

Example

AT+CNSLIM=0x1234

OK

AT+CNSLIM?

+CNSLIM: 0x1234

OK

 

 

 

L0536   AT+CFNSMOD    Adjust parameter fnsMode of RX_VOICE_FNS

This command is used to modify the fnsMode of RX_VOICE_FNS in DSP.

This command only be used during call and don’t save the parameter after call.

 

T) AT+CFNSMOD=?

+CFNSMOD: (list of supported <value>s)

OK

R) AT+CFNSMOD?

+CFNSMOD: <value>

OK

W) AT+CNSMOD=<value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<value> Gain value is bellow, default value is not a fixed value. It varies with different versions.
0x00FF   Maximum NS 0x0073 – Basic stationary NS
0x00F3   Enhanced stationary NS
0x01FF   Aggressive NS

 

Example

AT+CFNSMOD=0x0073

OK

AT+CFNSMOD?

+CFNSMOD: 0x0073

OK

 

 

 

L0537   AT+CFNSIN     Adjust parameter fnsInputGain of RX_VOICE_FNS

This command is used to modify the fnsInputGain of RX_VOICE_FNS in DSP.

This command only be used during call and don’t save the parameter after call.

 

T) AT+CFNSIN=?

+CFNSIN: (list of supported <value>s)

OK

R) AT+CFNSIN?

+CFNSIN: <value>

OK

W) AT+CFNSIN=<value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<value>

Gain value from 0x0000-0x7fff, default value is not a fixed value.

It varies with different versions

 

Example

AT+CFNSIN=0x2234

OK

AT+CFNSIN?

+CFNSIN: 0x2234

OK

 

      

 

 

L0538   AT+CFNSLVL     Adjust parameter fnsTargetNS of RX_VOICE_FNS

This command is used to modify the fnsTargetNS of RX_VOICE_FNS in DSP.

This command only be used during call and don’t save the parameter after call.

 

T) AT+CFNSLVL=?

+CFNSLVL: (list of supported <value>s)

OK

R) AT+CFNSLVL?

+CFNSLVL: <value>

OK

W) AT+CFNSLVL=<value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<value>

Gain value from 0x0000-0x7fff, default value is not a fixed value.

It varies with different versions

 

Example

 

 

 

AT+CFNSLVL=0x2234

OK

AT+CFNSLVL?

+CFNSLVL: 0x2234

OK

 

 

 

L0539   AT+CECRX     Enable or disable VOICE_MOD_ENABLE

This command is used to enable or disable VOICE_MOD_ENABLE. It modify the VOICE_MOD_ENABLE in DSP.

This command only be used during call and don’t save the parameter after call

 

T) AT+CECRX=?

+CECRX: (list of supported <value>s)

OK

R) AT+CECRX?

+CECRX: <value>

OK

W) AT+CECRX=<value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<value> This default value is not a fixed value. It varies with different versions.
1 Enable
0 Disable

NOTE: The LE20 base modules are not support this command

 

Example

AT+CECRX=1

OK

AT+CECRX?

+CECRX: 1

OK

 

 

 

L0540   AT+CNLPPG     Modify the NLPP_gain in DSP

This command is used to modify the NLPP_gain of VOICE_ECRX_PARAM in DSP.

This command only be used during call and don’t save the parameter after call.

 

T)AT+CNLPPG=?

+CNLPPG: (list of supported <value>s)

OK

R) AT+CNLPPG?

+CNLPPG: <value>

OK

W) AT+CNLPPG=<value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<value>

Gain value from 0x0000-0x7fff, default value is not a fixed value.

It varies with different versions

 NOTE: The LE20 base modules are not support this command

 

Example

AT+CNLPPG=0x1234

OK

AT+CNLPPG?

+CNLPPG: 0x1234

OK

 

 

 

L0541   AT+CNLPPL     Modify the NLPP_limit in DSP

This command is used to modify the NLPP_limit of VOICE_ECRX_PARAM in DSP.

This command only be used during call and don’t save the parameter after call

 

T) AT+CNLPPL=?

+CNLPPL: (list of supported <value>s)

OK

R) AT+CNLPPL?

+CNLPPL: <value>

OK

W) AT+CNLPPL=<value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<value>

Gain value from 0x0000-0x7fff, default value is not a fixed value.

It varies with different versions

NOTE: The LE20 base modules are not support this command

 

Example

AT+CNLPPL=0x1234

OK

AT+CNLPPL?

+CNSN: 0x1234

OK

 

 

 

L0542   AT+CECM     Adjust echo canceller

This AT command is used to select the echo cancellation mode. Write command only be used during call.

 

T) AT+CECM=?

+CECM: (list of supported <value>s)

OK

R) AT+CECM?

+CECM: <value>

OK

W) AT+CECM=<value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<value> This default value is not a fixed value. It varies with different versions.
0 disable EC mode
1     EC mode recommended for Speaker phone aggressive
2     EC mode recommended for Speaker phone medium
3     EC mode recommended for Speaker least aggressive
4     EC mode recommended for Bluetooth
5     EC mode recommended for Bluetooth (less aggressive)
6     EC mode recommended for Bluetooth (least aggressive)
7     EC mode recommended for HANDSFREE
8     EC mode recommended for Headset
9     EC mode recommended for Handset

 

Example

A T+CECM=1

OK

AT+CECM?

+CECM: 1

OK

 

 

 

L0543   AT+CPCMFRM     Set usb audio sample rate to 16K bit

This command is used to set usb audio sample rate to 16K bit.

Note: This command only support for usb audio 8k to 16k switching, but not support for 16k to 8k switching.

 

T) AT+CPCMFRM=?

+CPCMFRM: (list of supported <value>s)

OK

R) AT+CPCMFRM?

+CPCMFRM: <value>

OK

W) AT+CPCMFRM=<value>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<value> Gain value from 0-1, default value is 0.
0    usb audio use 8k bit
1    usb audio use 16k bit

 

Example

AT+CPCMFRM=1

OK

AT+CPCMFRM?

+CPCMFRM: 1

OK

 

 

 

L0544   AT+CPTONE    Play tone

This AT command is used to local play a tone.

 

T) AT+CPTONE=?

+CPTONE: (list of supported <tone>s)

OK

W) AT+CPTONE=<tone>

OK

or

ERROR

W)AT+CPTONE=<tone>,<time>,<gain>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<tone> Support 0-16.
<tone> Duration, the default value is 50ms. Support 1-1000.
<gain> The default value is 4000. Support 1-9999.

 

Example

AT+CPTONE=1

OK

AT+CPTONE=1,200,1000

OK

 

 

 

L0545   AT+CODECCTL     Control codec by Host device or Module

This command is used to select Host device or Module to control codec.

This command doesn’t save the parameter after reboot.

 

T) AT+CODECCTL=?

+CCODECCTL: (list of supported <mode>s)

OK

R) AT+CODECCTL?

+CCODECCTL: <mode>

OK

W) AT+CODECCTL=<mode>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<mode> mode value from 0-1, default value is 0.
0    Module control codec when play sound.
1     Host device control codec. Host device can open codec by AT+CSDVC=1or AT+CSDVC=3, close codec by AT+CSDVC=0.

 

Example

AT+CODECCTL=1

OK

AT+CODECCTL?

+CCODECCTL: 1

OK

 

 

 

L0546   AT+CPCMBANDWIDTH     Modify the sampling rate of the PCM

This command is used to modify the sampling rate of the PCM to 8k or 16k.

This command don’t save the parameter after reboot.

 

T) AT+CPCMBANDWIDTH=?

+CPCMBANDWIDTH: (list of supported <volte_sample>s),

(list of supported <novolte_sample>s)

OK

R) AT+CPCMBANDWIDTH?

+CPCMBANDWIDTH: <volte_sample>,<novolte_sample>

OK

W)AT+CPCMBANDWIDTH=<mode>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<volte_sample>

Value from 0-1, default value is 0.

0      Sampling rate is 16K.

1      Sampling rate is 8K.

<novolte_sample>

Value from 0-1, default value is 0.

0      Sampling rate is 16K.

1      Sampling rate is 8K.

 

Example

AT+CPCMBANDWIDTH=1,0

OK

AT+CPCMBANDWIDTH?

+CPCMBANDWIDTH: 1,0

OK

 

 

 

L0547   AT+CSDVC   Switch voice channel device

This command is used to switch voice channel device. After changing current voice channel device and if there is a connecting voice call,

it will use the settings of previous device (loudspeaker volume level, mute state of loudspeaker and microphone,

refer to AT+CLVL, AT+VMUTE, and AT+CMUT).

 

T) AT+CSDVC=?

+CSDVC: (list of supported <dev>s)

OK

R) AT+CSDVC?

+CSDVC: <dev>

OK

W) AT+CSDVC=<dev>

OK

or

ERROR

Parameter Saving Mode NO_SAVE

 

<dev>

Value from 0-3, default value is 1.

0        Close voice channel device. Only used after AT+CODECCTL=1

1        Handset.

3        Speaker phone.

 

Example

AT+CSDVC=1

OK

AT+CSDVC?

+CSDVC: 1

OK

 

 

 

 

 

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