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This SDK only works with devices released within the past 3 years. We regularly optimize and update the SDK to ensure compatibility and performance. We do not guarantee compatibility or provide technical support for devices older than 3 years.

# CHANNEL_TYPE

### Enum Definition

C++C#

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    typedef enum __Channel_type__
    {
        E_NULL_CHL_TYPE,
        E_DIGITAL_CHL_TYPE,
        E_ANALOG_CHL_TYPE,
        E_ALARMOUT_CHL_TYPE,
        E_SENSOR_CHL_TYPE,
        E_VOICE_CHL_TYPE,
    } CHANNEL_TYPE;

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    public enum CHANNEL_TYPE
    {
        E_NULL_CHL_TYPE,
        E_DIGITAL_CHL_TYPE,
        E_ANALOG_CHL_TYPE,
        E_ALARMOUT_CHL_TYPE,
        E_SENSOR_CHL_TYPE,
        E_VOICE_CHL_TYPE,
    }

### Function Description

Channel Type

### Member Description

Enum name | Value | Remark
--- | --- | ---
E_NULL_CHL_TYPE | 0 | Empty Channel
E_DIGITAL_CHL_TYPE | 1 | Digital Channels
E_ANALOG_CHL_TYPE | 2 | Analog Channels
E_ALARMOUT_CHL_TYPE | 3 | Alarm output channel
E_SENSOR_CHL_TYPE | 4 | Sensor Channel
E_VOICE_CHL_TYPE | 5 | Audio channel

Error Code