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Connection Timeouts
The Ethernet link times out after a designated period of time with no communication. By
default, this timeout value is 5 minutes, but the value can be changed (see
session port timeout
NOTE: Extron recommends leaving the default timeout at 5 minutes and periodically
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 SME 211 accepts SIS commands through the rear panel Remote RS‑232 port, the
front panel Config port, and the rear panel Ethernet (LAN) port. SIS commands consist
of one or more characters per command field. Each response to an SIS command ends
with a carriage return and a line feed (CR/LF =
character string. A string is one or more characters.
SME 211 - Initiated Messages
The SME 211 initiates messages under specific conditions. No response is required from
the host. The SME 211 initiated message is as follows:
]
Day, DD MMM YYYY HH:MM:SS
The SME sends the copyright messages under the following circumstances:
•
•
Password Information
The ] Password
by a carriage return. The prompt is repeated if the correct password is not entered.
If the correct password is entered, the unit responds with ] Login Administrator ]
or ] Login User ] , depending on the password entered. If passwords are the same for
both administrator and user, the unit will default to administrator privileges.
on page 72).
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.
© Copyright 2018, Extron Electronics, SME 211, Vn.nn, 60– XXXX-01
If the SME is off and an RS‑232 connection is already set up (the PC is cabled to the
SME and a serial communication program such as DataViewer is open), the connected
unit sends these messages via RS‑232 when first powered on.
If the SME is on, it sends the copyright message when a Telnet connection to the
SME is first opened. The day of the week, date, and time are shown when the SME 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.
prompt requires a password (administrator level or user level) followed
:
]
), which signals the end of the response
]
SME 211 • Remote Communication and Control
Set current
]
60
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