voiceCall - Voice Call

2025-03-25

This feature provides voice call APIs.

The modules supporting voice call are listed below.
EC600N series: EC600NCN_LC/EC600NCN_LD/EC600NCN_LF

EC600S series: EC600SCN_LA
EG912N series: EG912NEN_AA
EG915N series: EG915NEU_AG/EG915NEA_AC
EC200A series: EC200AAU_HA/EC200ACN_DA/EC200ACN_HA/EC200ACN_LA/EC200AEU_HA
EC200U series: EC200UAU_AA/EC200UAU_AB/EC200UCN_AA/EC200UEU_AA/EC200UEU_AB
EC600U series: EEC600UEU_AB/EC600UEC_AC/EC600ULA_AC
EG912U series: EG912UGL_AA/EG912UGL_AC
EG915U series: EG915UEU_AB/EG915ULA_AB

BC25/BC32/EC600G/EC800G/BG95 series module does not support voice call.

EC600M/EC800M/EG810M series modules support voice call only when the firmware supports VOLTE.

For other modules, a custom version is required to support voice call.

Set Automatic Answering Time

`voiceCall.setAutoAnswer`

voiceCall.setAutoAnswer(seconds)

Sets automatic answering time of a voice call.

Parameter

seconds - Integer type. Automatic answering time of a voice call. Range: 0–255. Unit: s.

Return Value

0 - Successful execution

-1 - Failed execution

EC200U/EC600U/EG912U/EG915U series of module, set seconds represents the number of telephone ringing before answering. The unit is Rings, not seconds.

For a VolTE-based IMS call, seconds indicates whether auto answer is enabled. 0 : disables auto answer. Non-0 : Enable automatic answer, no answer time setting.

Example

>>> import voiceCall
>>> voiceCall.setAutoAnswer(5)
0

Dial Voice Call

`voiceCall.callStart`

voiceCall.callStart(phonenum)

Dials a voice call.

Parameter

phonenum - String type. Phone number of the recipient.

Return Value

0 - Successful execution

-1 - Failed execution

Example

>>> import voiceCall
>>> voiceCall.callStart("13855169092")
0

Answer Voice Call

`voiceCall.callAnswer`

voiceCall.callAnswer()

Answers a voice call.

Return Value

0 - Successful execution

-1 - Failed execution

Example

>>> voiceCall.callAnswer()
0

End Voice Call

`voiceCall.callEnd`

voiceCall.callEnd()

Ends a voice call.

Return Value

0 - Successful execution

-1 - Failed execution

Example

>>> import voiceCall
>>> voiceCall.callEnd()
0

Register Callback Function

`voiceCall.setCallback`

voiceCall.setCallback(voicecallFun)

Registers the callback function of different voice call statuses.

Parameter

voicecallFun - Callback function name. The callback function format and parameters are described below.

def voicecallFun(args):
    pass

args[0] - Integer type. Voice call status. The number of parameters to the callback function is not fixed but is determined by the first parameter args[0] , as shown in the following table.

Value	Number of Parameters	args[0] Description	Description of Other Parameters
1	1	Voice call is initialized (The process is completed in the bottom layer with no user intervention.
2	3	Incoming call alert, ringing	`args[1]` : Caller ID `args[2]` : Phone number
3	3	Connected	`args[1]` : Caller ID `args[2]` : Phone number
4	3	Disconnected	`args[1]` : Caller ID `args[2]` : Call disconnection reason
5	1	Unknown error
6	5	Call waiting	`args[1]` : Caller ID `args[2]` : Phone number `args[3]` : Phone number type [129/145]. 129 - Unknown type 145 - International type `args[4]` : CLI status
7	1	Dialing
8	4	Dialing failed	`args[1]` : Caller ID `args[2]` : Dialing failure reason `args[3]` : Indicator that whether in-band tones can be obtained from the network side
9	3	Waiting	`args[1]` : Caller ID `args[2]` : Phone number
10	8	Incoming call alert, ringing (VoLTE call)	`args[1]` : Caller ID `args[2]` : Call direction (MO/MT) `args[3]` : Call status `args[4]` : Business type (Generally, this value is 0, indicating voice call) `args[5]` : Flag of MTPY `args[6]` : Phone number `args[7]` : Phone number type `args[8]` : Reserve
11	8	Connected (VoLTE call)	`args[1] – args[8]` : Same as above for specific description
12	8	Disconnected (VoLTE call)	`args[1] – args[8]` : Same as above for specific description
13	8	Call waiting (VoLTE call)	`args[1] – args[8]` : Same as above for specific description
14	8	Dialing (VoLTE call)	`args[1] – args[8]` : Same as above for specific description
15	8	Dialing with no ring on the other party (VoLTE call)	`args[1] – args[8]` : Same as above for specific description
16	8	Waiting (VoLTE call)	`args[1] – args[8]` : Same as above for specific description

When the value of args[0] is 10-16, the detailed description of args[1] - args[8] :

args[n]	Description	Type	Parameter value
args[1]	idx	Integer	A unique numeric ID used to distinguish active calls. Usually takes the value 1-n, where n is the maximum number of concurrent calls supported by the module.
args[2]	direction	Integer	0 - Mobile originated (MO) call 1 - Mobile terminated (MT) call
args[3]	state	Integer	0 - Active 1 - Held 2 - Dialing (MO call) 3 - Alerting (MO call) 4 - Incoming (MT call) 5 - Waiting (MT call) 6 - Hang up
args[4]	mode	Integer	0 - Voice 1 - Data 2 - FAX
args[5]	mpty	Integer	0 - Call is not one of multiparty (conference) call parties 1 - Call is one of multiparty (conference) call parties
args[6]	number	String	Phone number in string type in format specified by
args[7]	type	Integer	129 - Unknown type 145 - International type (contains the character "+") 161 - National type
args[8]	Reserve	Integer	Reserve

Return Value

0 - Successful execution

-1 - Failed execution

Example

>>> import voiceCall
def voice_callback(args):
    if not isinstance(args, tuple):
        print('voicecall is GSM call, args:', args)
    elif args[0] == 10:
        print('voicecall incoming call, PhoneNO: ', args[6])
    elif args[0] == 11:
        print('voicecall connected, PhoneNO: ', args[6])
    elif args[0] == 12:
        print('voicecall disconnect')
    elif args[0] == 13:
        print('voicecall is waiting, PhoneNO: ', args[6])
    elif args[0] == 14:
        print('voicecall dialing, PhoneNO: ', args[6])
    elif args[0] == 15:
        print('voicecall alerting, PhoneNO: ', args[6])
    elif args[0] == 16:
        print('voicecall holding, PhoneNO: ', args[6])
    else:
        print('voicecall is GSM call, args:', args)

>>> voiceCall.setCallback(voice_callback)
0
>>> voiceCall.callStart('10086')
0

The above information only applies to versions released after 2021-09-09 that support voice call.

Versions released before QPY_V0004_EC600N_CNLC_FW_VOLTE (released on 2021-09-09) use voice calls according to the following rules.

args[0] - Integer type. Voice call status. The number of parameters and the meanings of other parameters are described below.

Value	Number of Parameters	args[0] Description	Description of Other Parameters
4103	8	Incoming call alert, ringing (VoLTE call)	`args[1]` : Caller ID `args[2]` : Call direction (MO/MT) `args[3]` : Call status `args[4]` : Business type (Generally, this value is 0, indicating voice call) `args[5]` : Flag of MTPT 0 - Non-MTPT 1 - MTPT `args[6]` : Phone number `args[7]` : Phone number type [129/145]. 129 - Unknown type 145 - International type
4104	8	Connected (VoLTE call)	`args[1] – args[7]` : Same as above for specific description
4105	8	Disconnected (VoLTE call)	`args[1] – args[7]` : Same as above for specific description
4106	8	Call waiting (VoLTE call)	`args[1] – args[7]` : Same as above for specific description

Example

>>> import voiceCall
def voice_callback(args):
    if args[0] == 4106:
    	print('voicecall is waiting')
    elif args[0] == 4105:
    	print('voicecall disconnect')
    elif args[0] == 4104:
    	print('voicecall connected, CallNO: ', args[6])
    elif args[0] == 4103:
    	print('voicecall incoming call, PhoneNO: ', args[6])

Auto Hang-up

`voiceCall.setAutoCancel`

voiceCall.setAutoCancel(enable)

Enables auto hang-up when receiving calls.

Parameter

enable - Enable or disable auto hang-up when receiving calls.

0 -Disable (default)

1 - Enable

Return Value

0 - Successful execution

-1 - Failed execution

EC200AAU_HA/EC200ACN_DA/EC200ACN_HA/EC200ACN_LA/EC200AEU_HA series module supports this method.

Example

>>> import voiceCall
# When you call the module on your phone, the module will not hang up by default.
>>> voiceCall.getAutoCancelStatus()
0

# Enable auto hang-up. When you call the module on your phone, the module will hang up by default.
>>> voiceCall.setAutoCancel(1)
0
>>> voiceCall.getAutoCancelStatus()
1

`voiceCall.getAutoCancelStatus`

voiceCall.getAutoCancelStatus()

Gets the enablement status of auto hang-up.

Return Value

0 : Auto hang-up is disabled

1 : Auto hang-up is enabled

EC200AAU_HA/EC200ACN_DA/EC200ACN_HA/EC200ACN_LA/EC200AEU_HA series module supports this method.

Example

>>> import voiceCall
# When you call the module on your phone, the module will not hang up by default.
>>> voiceCall.getAutoCancelStatus()
0

# Enable auto hang-up. When you call the module on your phone, the module will hang up by default.
>>> voiceCall.setAutoCancel(1)
0
>>> voiceCall.getAutoCancelStatus()
1

Detect DTMF

`voiceCall.startDtmf`

voiceCall.startDtmf(dtmf, duration)

Sets DTMF tone.

Parameter

dtmf - String type. DTMF symbols. Valid symbols: 0-9, A, B, C, D, * and # . Maximum number of characters: 6.
duration - Integer type. Duration. Range: 100–1000. Unit: ms.

Return Value

0 - Successful execution

-1 - Failed execution

This method takes effect only during a voice call.

Multiple characters can be sent at a time (after 2024/4/2, a maximum of 6 characters can be sent at a time).

Example

>>> import voiceCall
>>> voiceCall.startDtmf('A',100)
0

`voiceCall.dtmfDetEnable`

voiceCall.dtmfDetEnable(enable)

Enables the feature of DTMF detection. DTMF detection is disabled by default.

Parameter

enable - Integer type. Enable or disable DTMF detection.

0 - Disable DTMF detection

1 - Enable DTMF detection

Return Value

0 - Successful execution

-1 - Failed execution

EC600N/EC800N/EG912N/EG915N series module supports this method.

`voiceCall.dtmfSetCb`

voiceCall.dtmfSetCb(dtmfFun)

Registers the callback function of DTMF detection.

Parameter

dtmfFun - Callback function name. The callback function format and parameters are described below.

def dtmfFun(args):
    pass

Parameter	Type	Description
`args`	String	DTMF characters entered by the peer end.

Return Value

0 - Successful execution

-1 - Failed execution

EC600N/EC600S/EC800N/EG912N/EG915N series module supports this method.

Example

>>> import voiceCall
>>> def cb(args):
... print(args)

>>> voiceCall.dtmfSetCb(cb)
0
>>> voiceCall.dtmfDetEnable(1)
0
>>> voiceCall.callStart('13855169092')
0
>>>
1   # If you press 1 on your phone, the pressed character "1" will be received by the callback function.

8   # If you press 8 on your phone, the pressed character "8" will be received by the callback function.

9   # If you press 9 on your phone, the pressed character "9" will be received by the callback function.

Set Up Call Forwarding

`voiceCall.setFw`

voiceCall.setFw(reason, fwmode, phonenum)

Sets up call forwarding.

Parameter

reason - Integer type. Call forwarding conditions, as described below.

Value	Description
0	Unconditional
1	Busy
2	No reply
3	Not reachable

fwMode - Integer type. Call forwarding operations, as described below.

Value	Description
0	Deactivate call forwarding.
1	Activate call forwarding.
2	Query call forwarding status.
3	Register call forwarding.
4	Erase call forwarding.

phonenum - String type. The number to which calls are forwarded.

Return Value

0 - Successful execution

-1 - Failed execution

The call transfer function can be used only after the call transfer function is enabled for the sim card carrier.

Switch Voice Channel

`voiceCall.setChannel`

voiceCall.setChannel(device)

Sets the voice output channel during a call. Default value: 0 (handset).

Parameter

device - Integer type. Output channel, as described below.

Value	Description
0	Handset
1	Headset
2	Loudspeaker

Return Value

0 - Successful execution

-1 - Failed execution

Example

>>> voiceCall.setChannel(2) # Switch to loudspeaker channel.
0

Set Call Volume

`voiceCall.getVolume`

voiceCall.getVolume()

Gets the current call volume.

Return Value

Integer type. Volume.

`voiceCall.setVolume`

voiceCall.setVolume(volume)

Sets call volume.

Parameter

volume - Integer type. Volume. Range: 0–11 . The higher the value, the higher the volume.

Return Value

0 - Successful execution

-1 - Failed execution

Automatic Recording

`voiceCall.setAutoRecord`

voiceCall.setAutoRecord(enable, recordType, recordMode, filename)

Enables automatic recording. Automatic recording is disabled by default. The automatic recording must be enabled before the call.

Parameter

enable - Integer type. Enable or disable automatic recording.

0 - Disable

1 - Enable
recordType - Integer type. Recording file type, as described below.

Value	Description
0	AMR
1	WAV

recordMode - Integer type. Mode, as described below.

Value	Description
0	The recording is the audio stream of the downlink channel.
1	The recording is the audio stream of the uplink channel.
2	The recording is a mixed audio stream of uplink and downlink channels.

filename - String type. The desired file name, which must contain the full path.

Return Value

0 - Successful execution

-1 - Failed execution

"NOT SUPPORT" - The interface is not supported.

Example

>>> voiceCall.setAutoRecord(1,0,2,'U:/test.amr')
0

For EC200U/EC600U/EG912U/EG915U series modules, the recordMode parameter currently only supports the value 2.

QuecPython currently does not support automatic creation of subdirectories when creating files. For example, filename is 'U:/record/test.amr', if there is no 'record' directory in the usr directory, the user needs to use uos.mkdir('/usr/record') to create a 'record' directory .

`voiceCall.startRecord`

voiceCall.startRecord(recordType, recordMode, filename)

Starts recording the call.

Parameter

recordType - Integer type. Recording file type, as described below.

Value	Description
0	AMR
1	WAV

recordMode - Integer type. Mode, as described below.

Value	Description
0	The recording is the audio stream of the downlink channel.
1	The recording is the audio stream of the uplink channel.
2	The recording is a mixed audio stream of uplink and downlink channels.

filename - String type. The desired file name, which must contain the full path.

Return Value

0 - Successful execution

-1 - Failed execution

"NOT SUPPORT" - The interface is not supported.

Example

>>> import voiceCall
>>> voiceCall.startRecord(0,2,'U:/test.amr')
0

For EC200U/EC600U/EG912U/EG915U series modules, the recordMode parameter currently only supports the value 2.

QuecPython currently does not support automatic creation of subdirectories when creating files. For example, filename is 'U:/record/test.amr', if there is no 'record' directory in the usr directory, the user needs to use uos.mkdir('/usr/record') to create a 'record' directory .

`voiceCall.stopRecord`

voiceCall.stopRecord()

Stops recording the call.

Return Value

0 - Successful execution

-1 - Failed execution

"NOT SUPPORT" - The interface is not supported.

Example

>>> voiceCall.stopRecord()
0

`voiceCall.readRecordStream`

voiceCall.readRecordStream(readBuf, bufLen)

Reads recording data stream.

Parameter

readBuf - Buffer used to save the data read.
bufLen - Length of the string to be read, which cannot be longer than the data length requested by readBuf .

Return Value

Length of the data read - Successful execution

-1 - Failed execution

"NOT SUPPORT" - The interface is not supported.

The first packet of data in the recording stream is the header of the file in the corresponding format.

The first packet of recording streams in WAV format does not contain the file size. You need to calculate the file size after the recording is complete.

`voiceCall.startRecordStream`

voiceCall.startRecordStream(recordType, recordMode, callbackFun)

Starts recording the call in stream format.

Parameter

recordType - Integer type. Recording file type, as described below.

Value	Description
0	AMR
1	WAV

recordMode - Integer type. Mode, as described below.

Value	Description
0	RX
1	TX
2	MIX

callbackFun - Callback function name. The callback function format and parameters are described below.

def recordStreamCallback(args):
    pass

Parameter	Type	Description
`args[0]`	String	Recording data stream
`args[1]`	Integer	Length of the recording data stream.
`args[2]`	Integer	Recording status -1: Recording error 0: Start recording 1: Return recording data 2: Stop recording 3: Recording ends 4: No remaining space.

Return Value

0 - Successful execution

-1 - Failed execution

"NOT SUPPORT" - The interface is not supported.

The first packet of data in the recording stream is the header of the file in the corresponding format.

The first packet of recording streams in WAV format does not contain the file size. You need to calculate the file size after the recording is completed.

Example

>>> import voiceCall
>>> import audio

>>> f=open('usr/mia.amr','w')

>>> def cb(para):
...     if(para[2] == 1):
...         read_buf = bytearray(para[1])
...         voiceCall.readRecordStream(read_buf,para[1])
...         f.write(read_buf,para[1])
...         del read_buf
...     elif(para[2] == 3):
...         f.close()
...         
>>> voiceCall.callStart('13855169092')
0
>>> voiceCall.startRecordStream(0,2,cb)
0
# Hang up. Either MO or MT hangs up.
>>> uos.listdir('usr')
['system_config.json', 'mia.amr']
>>> aud=audio.Audio(0)
>>> aud.setVolume(11)
0
>>> aud.play(2,1,'U:/mia.amr')
0

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