Extron Electronics DMS 1600_2000_3200_3600 User Guide - Manual (Page 54)

DMS 1600, DMS 2000, DMS 3200, and DMS 3600 • Programming Guide 48
Number of Connections
A DMS matrix 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 be kept low
and unnecessary open sockets should be closed.
Using Verbose Mode
A Telnet connection to a DMS matrix 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
Verbose mode SIS command
on page 60). In verbose mode 1 or 3, the Telnet socket reports changes in messages that
resemble SIS command responses.
Host-to-Switcher Instructions
SIS commands consist of one or more characters per field. No special characters are
required to begin or end a command character sequence. When a command is valid, the
unit executes the command and sends a response to the host device. All responses from
the unit to the host end 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.
Switcher-Initiated Messages
When the connection is via a serial port or the switcher is in verbose mode 2 or 3, and 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 (underlined).
(c) Copyright 20nn, Extron Electronics, DMS nn00 AC, V x . xx , 60-1nnn-01 ]
{Day, date, time} ]
The switcher issues the appropriate copyright message (above) when it is first powered on
or when connection via Internet Protocol (IP) is established. Vx.xx is the firmware version
number. “
AC ” appears after the model name for the DMS 2000 and the DMS 3200 only.
NOTE: {Day, date, time} are reported only if the connection is via the LAN port.
] 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. This message means that the switcher requires an administrator or user level
password before it will perform the commands entered via this link. The switcher repeats
the password message response for every entry other than a valid password until a valid
password is entered.
] Login Administrator ]
] Login User ]
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.