# Alerts for multiplexes
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The following table lists the alerts that MediaLive might generate for a multiplex. You can view these alerts in these ways:
+ You can view the alerts for each multiplex on the MediaLive console. For more information, see [Alerts tab – Viewing alerts](monitoring-console-general.md#view-alerts).
+ You use your preferred AWS SDK or API to monitor alerts about multiplex activity. For more information, see [Monitoring alerts using the AWS SDKs or API](monitoring-api.md).
+ MediaLive turns alerts into CloudWatch events with the detailType set to `MediaLive Multiplex Alert`. For an example of the JSON for these events, see [JSON for a state change event](monitoring-cloudwatch-json-state-change.md).


| Alert ID | Alert wording | Description | 
| --- | --- | --- | 
| 7001  | Communication Lost from Encoder  | The multiplex is not receiving communication from one or more encoders.  | 
| 7002  | Communication Lost from Multiplex  | The encoder is not receiving communication from the multiplex.  | 
| 7003  | Active Encoder Switched for Program  | The multiplex has switched to using a different encoder pipeline for the output of a multiplex program.  | 
| 7004  | Active Encoder Sent Fill or Slate Frames  | Program \$1\$1multiplex\$1program\$1name\$1 is receiving fill or slate frames from the active encoder.  | 
| 7005  | MPTS Bitrate Overflow  | The bitrate for the MPTS is over the limit. The MPTS bitrate is the sum of the bitrate for all of the programs. The problem should resolve itself within a few seconds. |