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Connection Timeouts
The Ethernet link times out after a designated period of time of no communications.
By default, this timeout value is set at five minutes but the value can be changed.
See the "Global configure IP port timeout" command on page
N Extron recommends leaving the default timeout at five minutes and periodically
issuing the Query (Q) command to keep the connection active. If there are long
idle periods, Extron recommends disconnecting the socket and reopening the
connection when another command must be sent.
Number of connections
An SMX 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 an IP Link device, the number of connections should stay
low and unnecessary open sockets should be closed.
Using Verbose Mode
Telnet connections to the switcher can be used to monitor 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.
command on page
in messages that resemble SIS command responses.
Host-to-Switcher Instructions
The SMX accepts SIS commands through the RS-232/RS-422 and Ethernet ports.
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 =
is one or more characters.
Switcher-Initiated Messages
When a local event such as a front panel operation occurs, the switcher responds by
sending a message to the host. The switcher-initiated messages are listed below.
With an RS-232/422 connection (upon power up):
(c) Copyright 2009, Extron Electronics SMX, Vx.xx, 60-XXX-01
With an Internet connection:
(c) Copyright 2009, Extron Electronics SMX, Vx.xx, 60-XXX-01
Ddd, DD MMM YYYY HH:MM:SS (day, date time. e.g. Tue, 14 Apr 2009 14:43:17)
The switcher initiates the copyright message when powered on or when connection
via Internet protocol (IP) is established. Vx.xx is the firmware version number.
]
Password:
The switcher initiates the password message immediately after the copyright
message when the controlling system is connected using TCP/IP or Telnet and the
switcher is password protected. The switcher requires an administrator or user
level password before performing the commands entered.
N Password prompt is re-displayed if an incorrect password is entered.
]
Login Administrator
The switcher initiates the login message when a correct administrator or user
password has been entered. If the user and administrator passwords are the same,
the switcher defaults to administrator privileges.
4-21. In verbose mode 1 or 3, the telnet socket reports changes
), which signals the end of the response character string. A string
]
]
]
or
Login User
SMX System Multimatrix Switcher • Programmer's Guide
4-22.
See the Verbose Mode
]
Reconfig
]
]
]
4-3
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