Extron Electronics IPL T CR48 - Manual (Page 29)

Programmer’s Guide for the Telnet and Web Browser
Using the Command/Response Table
The following are either Telnet (port 23) or Web browser (port 80) commands. There
are some minor differences when implementing these commands via Telnet or via URL
encoding using a Web browser. All commands listed below will work using either connection
method, but due to some limitations of the Web browser, the encapsulation characters are
modified to make sure that the Web browser will properly handle them. All examples in the
command/response table show the proper implementation in a Telnet or Web browser
session.
NOTE: For Web browsers, all non-alphanumeric characters must be represented as their
hex equivalent such as %xx where xx equals the two character representation of
the hex byte that needs to be sent (for example, a comma would be represented
as %2C).
Telnet Web Browser
Escape (Hex 1B) W [must not be encoded]
Carriage Return (Hex 0D) Pipe Character ( | ) [must not be encoded]
When using these commands through a Web browser, the URL reference is used below to
shorten the examples. This would, in practice, be the full URL of the control interface and
Web page reference including all path information (for example,
http://192.168.100.10/myform.htm).
To send any of the commands using a Web browser, you need to prefix them with the full
URL followed by
?cmd= (see URL Encoding , later in this section).
NOTE: With Telnet you can use either the “Escape” character or the “W” character,
and the carriage return or the pipe character. With the Web browser, you are
required to use the “W” character and the pipe character.
In either method {Data} signifies that data will be directed to a specified port and must be
encoded if it is non-alphanumeric.
The table on pages 28 through 32 lists the commands that the IPL T CR48 recognizes as
valid, the responses that are returned to the host, a description of the function of each
command, and the results of executing the command.
NOTE: Upper and lower case text can be used interchangeably except where noted.
IPL T CR48 • Communication and Control 23