Query string

Communication and Control, cont’d

Server Side Include Using a Remote SIS command

			SIS Command
<!--#echo var=" W 1		* 50 *	3 *	3L RS		Hello "-->


Delimiter	Port	Time to	Time	Length or Command	Delimiter
	Port	Time to	Time	Length or Command		Data to be
	Number	wait for	between	Delimiter		passed to
		first character	characters	parameter		external device
		of response	in response			via a serial port

SIS Command

Elements

*Type with no spaces.

Figure 4-2 — Example of an SSI “remote” command

In the example above, a “remote” serial command sends the word “Hello” and waits up to 50 ms for a response (until three characters are received). For more information on this command, see the “Command/response table for Simple Instruction Set (SIS) commands”, earlier in this chapter.

A query string is the portion of a URL that appears after the question mark. The query string contains parameters or instructions for the Web server to execute.

The basic format for a query string within a link is:

<a href=”index.html?cmd=x”>Input #1</a> Where x is the SIS command to be executed.

When a link is accessed on a Web page, the URL is passed to the Web server to tell it which Web page to return to the browser. The portion of the URL after the question mark is the query string, which contains the SIS command that the IPL T S interface removes and executes.

As with SSI formatted commands, query strings can use any valid SIS command — either “host” or “remote”.

The query string in the figure below turns off DHCP on the IP Link device.

URL with a Query String using a Host SIS command
				SIS Command
<a href="index.html		?	cmd=	W0DH	">	DHCP off </a>
HTML code	Starts		Tells Web server	SIS command	HTML code	Linked Text	Closes
HTML code	Query String		Tells Web server	SIS command	HTML code	Linked Text	Closes
for a link			an SIS command	to be processed	for a link		Link
			follows	by the IP Link
						*Type with no spaces.

Figure 4-3 — Example of a host query string command

URL with a Query String using a Remote SIS command

SIS Command

<a href="index.html ? cmd=

W 2 RS

"> Input #1 </a>

HTML code

for a link

Starts	Tells Web	Delimiter	Port Command	Delimiter Data to
Query String	Tells Web		Port Command	Delimiter Data to
	server an		Number	be passed to

	SIS command	external device
	follows
		via a serial port

HTML	Linked	Closes
code	Text	Link
for a link

*Type with no spaces.

Figure 4-4 — Example of a remote query string command

In the figure above, the data string that follows the pipe () symbol is sent to the attached controlled device on serial port #2. This string instructs an attached Extron switcher to change to input #1.

4-20 IPL T S Series • Communication and Control

IPL T S specifications

The Extron Electronics IPL T S is a powerful tool designed for seamless integration and control in AV applications. It provides a complete AV control solution that is highly intuitive and customizable. With its diverse set of features, the IPL T S caters to various environments, from educational institutions to corporate settings, delivering functionality and flexibility.

One of the standout features of the IPL T S is its user-friendly interface, which allows users to easily navigate through different control options. The device supports customizable touchscreen control, enabling users to personalize layouts according to their specific needs. This adaptability not only enhances user experience but also increases efficiency during presentations or meetings.

The technology behind the IPL T S includes advanced network control capabilities. It utilizes Extron’s well-rounded Global Viewer® technology, allowing users to manage and monitor their AV systems through a web-based application. This feature is crucial for IT managers or AV administrators who need real-time insight into the performance and status of their equipment, ensuring seamless operation.

Connectivity is another critical aspect of the IPL T S. It supports various control protocols, including IP, RS-232, and USB, making it compatible with a wide range of third-party devices. This compatibility not only simplifies integration but also offers users the flexibility to expand their AV systems as needed.

Moreover, the IPL T S is designed with robust security features, ensuring that control systems remain secure from unauthorized access. This is particularly important in corporate environments where sensitive information may be presented during meetings.

The device is built with reliability in mind, featuring Extron’s renowned quality assurance processes. It’s designed for uninterrupted performance, ensuring that users can rely on it during critical situations. Additionally, the IPL T S is backed by Extron’s extensive technical support, providing users with peace of mind.

In summary, the Extron IPL T S is an advanced, versatile AV control solution that greatly enhances the user experience in various settings. With its intuitive interface, extensive connectivity options, robust security features, and reliable performance, it stands out as an essential tool for modern AV applications, streamlining control and enabling effective communication.