Communication and Control

Programmer’s Guide for Telnet and Web Browsers

Using the command/response table

The following are either Telnet (port 23) or Web browser (port 80) commands.

There are some minor differences when you are implementing these commands via Telnet or via URL encoding using a Web browser. All commands listed below 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 properly handles them. All examples in the command/response table on

page 4-6 show the proper implementation in a Telnet or Web browser session.

NFor Web browsers: all non-alphanumeric characters must be represented as their hex equivalent, for example, %xx where xx equals the two character representation of the hex byte that needs to be sent (e.g., 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 these commands are used 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 chapter.

NWith Telnet you can use either the “Escape” commands with the carriage return

or the “W” commands with the pipe () character. With the Web browser you are required to use the “W” commands and the pipe character.

The “Command/response table for Simple Instruction Set (SIS™) commands” later in this chapter lists the commands that the IPL T S interface recognizes as valid, the responses that are returned to the host, a description of the command’s function or the results of executing the command, and an example of each command in ASCII (Telnet) and URL Encoded (Web).

NUpper- and lowercase text can be used interchangeably except where noted.

Symbol definitions are shown below. An ASCII to HEX conversion table is also provided in figure 4-11 (below).

ASCII to HEX Conversion Table

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Figure 4-11— ASCII-to-HEX conversion table

4-2 IPL T S Series • Communication and Control

IPL T S Series specifications

The Extron IPL T SFI244 is a sophisticated control system that is designed to streamline the management and operation of audiovisual equipment in a variety of environments, including conference rooms, classrooms, and auditoriums. This model falls under the IPL T S Series, renowned for its superior performance and user-friendly interface, making it a popular choice for integrators and users alike.

One of the standout features of the IPL T SFI244 is its advanced interface. It boasts an intuitive touch panel that enables users to manage multiple devices from a single control point, significantly simplifying the AV experience. The system supports a wide range of functions, including source selection, volume control, and the management of lighting and screen mechanisms. This centralized control helps to enhance collaboration and communication, particularly in educational and corporate settings.

The IPL T SFI244 integrates seamlessly with a variety of Extron technologies, including the GlobalViewer Enterprise, providing real-time monitoring and management capabilities. This web-based software solution gives administrators the ability to control AV systems remotely, ensuring optimal performance and minimizing downtime.

Another key characteristic of the IPL T SFI244 is its versatility. It incorporates various input and output options, such as HDMI, VGA, and audio connections, to accommodate different audiovisual equipment. This flexibility allows for easy integration into existing setups, catering to diverse applications and user preferences.

In terms of design, the IPL T SFI244 is engineered with reliability and durability in mind. It is equipped with features that enhance its performance in professional environments, including programmable button layouts that can be customized by users. This personalization ensures that the control system meets specific operational requirements, further enhancing the user experience.

Furthermore, the IPL T SFI244 is built with energy efficiency in mind, utilizing technologies that reduce power consumption without compromising performance. This eco-friendly approach not only supports sustainability initiatives but also contributes to long-term cost savings for organizations.

In summary, the Extron IPL T SFI244 is a comprehensive control solution that combines advanced technology, user-friendly features, and robust performance. Its ability to integrate with various AV equipment, coupled with its customizable interface and reliability, makes it an excellent choice for a wide range of applications, paving the way for more efficient and effective audiovisual management.