# Stopping activity in the multiplex
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You can stop a multiplex or a channel. 

## Stopping a multiplex
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Typically, after your multiplex is in a production environment, you stop the multiplex only to delete it. You don't need to stop the multiplex to modify it, except to modify the **Maximum Video Buffer Delay** field. 

When you stop a multiplex, the channels continue to run, although their outputs are not with an MPTS, so the outputs don't go to their destinations. 

When you stop a multiplex, you stop accruing charges for the multiplex. But you still accrue charges for the channels in the multiplex, unless you also stop those channels. 

**To stop a multiplex**

1. Open the MediaLive console at [https://console.aws.amazon.com/medialive/](https://console.aws.amazon.com/medialive/).

1. In the navigation pane, choose **Multiplexes**, and then choose the multiplex that you want to stop.

1. On the **Details** pane, choose **Multiplex actions**, and then choose **Stop multiplex**. If there are programs and those programs have running channels, then the channels continue to run, although their outputs don't go to their destinations. 

## Stopping a channel in a multiplex
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You must stop a channel to change its configuration or to delete it. 

When you stop a channel, the multiplex continues to run. MediaLive modifies the PMT to remove the PAT for the associated program. 

When you stop a channel, you stop accruing charges for the channel. But you still accrue charges for the multiplex, unless you also stop the multiplex. You should review the charges for a running multiplex; you might consider that there is not a lot of gain in stopping the multiplex. 

**To stop a channel**

1. Open the MediaLive console at [https://console.aws.amazon.com/medialive/](https://console.aws.amazon.com/medialive/).

1. In the navigation pane, choose **Multiplexes**, and then choose the program for the channel. 

1. On the **Programs** pane, choose the program or programs, choose **Multiplex actions**, and then choose **Stop channel**. 

You can also stop a channel in the multiplex in the same way as you stop a regular channel. For more information, see [Starting, stopping, and pausing a channel](starting-stopping-deleting-a-channel.md).