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# LrJposChannel.setUsable

Sets the usable state for the connection.

`public static void setUsable(boolean b)`

## Parameters

- b: The boolean value that represents the usable attribute.

## Return values

This function does not return any values.

## General information

The usable attribute is by default set to true when a connection is ready to use, and is set to false when the channel is disconnected.

You can use it to flag a connection as unusable, in order to force a reconnection.

Note: This attribute is used by ISOMUX internals for multiplexers. ISOMUX is deprecated and no longer exists in the current jPOS version.

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