The request URL for retrieving the list of all channels has the following form:
          /channels/all/
        
          The request must use the
          GET
          method.
        
          The response is a JSON object with the
          channels
          attribute as its only member.
          The
          channels
          attribute has an array as its value
          that contains an element
          for each channel.
          Each of these elements is an object with the
          following attributes:
        
| Field name | Internal data type | JSON data type | Description | 
|---|---|---|---|
| channelDataId | UUID | string | internal ID for the channel | 
| channelName | string | string | channel’s name | 
| controlSystemName | string | string | human-readable name of the control-system support used for the channel | 
| controlSystemType | string | string | internal identifier for the control-system support used for the channel | 
| decimationLevels | set of int | array of string | decimation levels that exist for the channel (specified in seconds) | 
| serverId | UUID | string | ID of the server that owns the channel | 
| serverName | string | string | human-readable name of the server that owns the channel | 
If the list of channels is currently not available, HTTP error code 503 (service unavailable) is returned and the response body is invalid.
Request:
GET /admin/api/1.0/channels/all/
Response:
{
  "channels": [
    {
      "channelDataId": "ef126a63-375b-4f28-a1d1-17e8f42271a9",
      "channelName": "someChannel",
      "controlSystemName": "Channel Access",
      "controlSystemType": "channel_access",
      "decimationLevels": ["0", "30", "900"],
      "serverId": "7cf8f393-cd00-46ae-9343-53e9cb5793fd",
      "serverName": "myserver"
    },
    {
      "channelDataId": "0993955f-d16e-486d-ac3b-6a1841c0fd3f",
      "channelName": "someOtherChannel",
      "controlSystemName": "Channel Access",
      "controlSystemType": "channel_access",
      "decimationLevels": ["0"],
      "serverId": "7cf8f393-cd00-46ae-9343-53e9cb5793fd",
      "serverName": "myserver"
    }
  ]
}