Customization; Server Side Includes - Extron electronics IPL T SF24 Series User Manual

Communication and Control, cont'd
IPL T SF24 and IPL T SFI244 • Communication and Control
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Customization

In the IPL T interface family, varying degrees of customization
are possible. Server side includes make it possible to obtain
information from the unit and display the information on Web
pages. URL encoding allows you to send information and
commands to the unit to change its configuration or provide
you with feedback.

Server side includes

Server sides includes (SSIs) are a type of HTML comment that
directs the Web server to dynamically generate data for a Web
page whenever it is requested. SSIs typically use Extron's
Simple Instruction Set (SIS) to communicate commands to the
products or attached control devices. Using SSIs, custom pages
can be designed and displayed, with IPL T interface information
provided by the SIS commands.
The basic format for an Extron SSI is:
<!—#echo var="x"—>
Where x is the SIS command to be executed.
The SIS instructions sent to IP Link-enabled products fall into
two categories: "host" or "remote".
1. Host commands instruct the IP Link product to act or
respond.
2. Remote commands pass data to an external control
port on an IP Link product.
When a Web page is requested, the Web server removes the SSI
and replaces it with the answer to the SIS command within
quotes.
Server Side Include Using
the Host SIS command
<!--#echo var="
*type with no spaces
Figure 4-22 — Example of SSI "host" command
In figure 4-22 above, the "N" command is used to request the IP
Link product's part number.
IPL T SF24 and IPL T SFI244 • Communication and Control
SIS Command
N "-->
SIS command
to be processed
by the IP Link
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