# N+M Hot Standby Interaction

## Function

This API is used to interact between devices in an N+M hot standby system.

## URI

    POST /API/RecordPatch/{Action}

Table 1 describes the parameters.

### Parameter Description

#### Table 1

Parameter | Required | Description
--- | --- | ---
Action | YES | Request action, including Check, GetChannelsInfo, SyncChnInfo, hotDevInfo, TimeInfo/Get, TimeInfo/Set.