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22 DXP DVI Pro and DXP HDMI Series • Remote Control
Connection Timeouts
The Ethernet link times out and disconnects after a designated
period of no communications. By default, this timeout value is set to
5 minutes but the value can be changed.
NOTE: Extron recommends leaving the default timeout at
5 minutes and periodically issuing the Query (Q) command
to keep the connection active or disconnecting the socket
and reopening the connection when necessary.
Number of Connections
A switcher can have up to 200 simultaneous TCP connections,
including all HTTP sockets and Telnet connections. When the
connection limit is reached, the switcher accepts no new connections
until some have been closed. No error message or indication is given
that the connection limit has been reached. To maximize performance
of your switcher, keep the number of connections low and close
unnecessary open sockets.
Verbose Mode
Telnet connections to a switcher can be used to monitor for changes
that occur on the switcher, such as front panel operations and SIS
commands from other Telnet sockets or a serial port. For a Telnet
session to receive change notices from the switcher, the Telnet session
must be in verbose mode 1 or 3 (see the Set verbose mode command
in the Command and Response Table for SIS Commands).
SIS Commands
The switchers have SIS commands that you can use for operation and
configuration. You can issue these commands from a PC connected to
either of the DXP serial ports or the Ethernet port (see "Rear Panels
and Connections" in the "Setup" section for connection information).
Host-to-switcher Instructions
The switcher accepts SIS commands through the LAN port or through
either serial port. SIS commands consist of one or more characters per
command field. They do not require any special characters to begin or
end the command character sequence. Each switcher response to an
SIS command ends with a carriage return and a line feed (CR/LF =
]
),
which signals the end of the response character string. A string is one
or more characters.