Telephony

Provides functions to control the voice calls.

An application can register a callback to listen to the call events, such as Accepting Call, Ending Call, etc., and take corresponding actions based on specific events.

Limitation

The LinkIt ONE v2.0 SDK supports only one SIM card. The functions dealing with multiple SIM cards are not applicable for the LinkIt ONE HDK/SDK.

Group

GSM

Functions

Function	Description
vm_gsm_tel_call_actions	APP uses this function to control call progress, such as accepting an incoming call, putting a hold on a call, or ending an ongoing call.
vm_gsm_tel_call_reg_listener	APP uses this function to register a callback function to listen to call events. The user_data for the callback function will be provided by the underneath native.
vm_gsm_tel_keytone_start_detect	Start telephony keytone detect. When there is keytone, this callback will be invoked, the interface should be invoke after telephony connected.
vm_gsm_tel_keytone_stop_detect	Stop telephony keytone detect.
vm_gsm_tel_set_output_device	Sets Telephony output device.
vm_gsm_tel_set_volume	Sets Telephony volume level.

Macros

Macro	Description
VM_GSM_TEL_MAX_ERROR_MESSAGE_LENGTH	Maximum length of the error messages.
VM_GSM_TEL_MAX_IP_NUMBER_LENGTH	Maximum length of IP number.
VM_GSM_TEL_MAX_NUMBER_LENGTH	Maximum length of the telephone numbers.

Structs, Records, Enums

Struct, Record, Enum	Description
VM_GSM_TEL_CALL_ACTION	Call actions.
vm_gsm_tel_call_actions_callback_data_t	Action callback data struct.
vm_gsm_tel_call_actions_data_t	Action structure
vm_gsm_tel_call_info_t	Incoming & outgoing call indication struct.
vm_gsm_tel_call_listener_data_t	Listen call event callback structure.
VM_GSM_TEL_CALL_SIM	Call type enum
vm_gsm_tel_connect_indication_t	Answer indication struct.
VM_GSM_TEL_DEVICE	Telephony output device structure
vm_gsm_tel_dial_action_request_t	Action struct for VM_GSM_TEL_CALL_ACTION_DIAL call type.
vm_gsm_tel_id_info_t	Call ID struct, should be unique.
VM_GSM_TEL_INDICATION	Call indication enum.
VM_GSM_TEL_RESULT	UCM error cause enum.
vm_gsm_tel_result_info_t	Action CALLBACK structure.
vm_gsm_tel_single_call_action_request_t	Action struct for VM_GSM_TEL_CALL_ACTION_ACCEPT & VM_GSM_TEL_CALL_ACTION_END_SINGLE call types.
vm_gsm_tel_single_group_action_request_t	Action struct for VM_GSM_TEL_CALL_ACTION_HOLD call type.

Types

Type	Description
vm_gsm_tel_call_actions_callback	The callback for the call actions. The action is specified in the type_action of data of vm_gsm_tel_call_actions_callback_data_t.
vm_gsm_tel_call_listener_callback	Callback function of the call indication.
vm_gsm_tel_keytone_callback	Telephony DTMF callback function pointer

Links

Topics, Functions, Macros, Structs, Records, Enums, Types

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