3. If the device is password protected, enter the appropriate administrator or user
password.
a. If the password is accepted, the device responds with Login User or Login
Administrator.
b. If the password is not accepted, the Password prompt reappears.
Connection Timeouts
The Ethernet link times out after a designated period of time of no communications. By
default, this timeout value is 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. If there are long
idle periods, disconnect the socket and reopen the connection when another
command must be sent.
Verbose Mode
Telnet connections can be used to monitor for changes that occur, such as SIS commands
from other Telnet sockets or serial port changes. For a Telnet session to receive change
notices, the Telnet session must be in verbose mode 1 or 3. In verbose mode 1 or 3, the
Telnet socket reports changes in messages that resemble SIS command responses.
Host-to-device Communications
The SMP351 accepts SIS (Simple Instruction Set) commands through the rear panel
Remote RS-232 port, the front panel Configuration port, and the rear panel Ethernet (LAN)
Port. SIS commands consist of one or more characters per command field. They do
not require special characters to begin or end the command character sequence. Each
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.
SMP351-initiated Messages
The SMP351 initiates messages under specific conditions. No response is required from
the host. The SMP351-initiated messages are listed here (underlined).
]
© Copyright 2014, Extron Electronics, SMP 351, Vn.nn, 60– 1324-01
]
Day,
DD MMM YYYY HH:MM:SS
]
or
]
© Copyright 2014, Extron Electronics, SMP 351 3G-SDI, Vn.nn, 60– 1324-02
]
Day,
DD MMM YYYY HH:MM:SS
]
Vn.nn is the firmware version number.
The SMP351 sends the copyright messages under the following circumstances:
• If the SMP351 is off and an RS-232 connection is already set up (the PC is cabled to
the SMP351 and a serial communication program such as HyperTerminal is open), the
connected unit sends these messages via RS-232 when first powered on.
• If the SMP351 is on, it sends the copyright messages when a Telnet connection to
the SMP351 is first opened. The day of the week, date, and time are shown when the
SMP351 is connected via Telnet, but not via RS-232. If using a Telnet connection, the
copyright message, date, and time may be followed by a password prompt.
159SMP351 • Remote Communication and Control
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