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.
22DXP DVI Pro and DXP HDMI Series • Remote Control