setAsyncExecute($value) 

Force async mode on for a socket connection. This command has no effect on outbound socket connections that are set to "async" in the dialplan and inbound socket connections, since these connections are already set to async mode on.

$value should be 1 to force async mode, and 0 not to force it.

Specifically, calling setAsyncExecute(1) operates by causing future calls to execute() to include the "async: true" header in the message sent to the channel. Other event socket library routines are not affected by this call.