Planet IGSW-2840 User Manual page 75

4.2.9 UPNP
Universal Plug and Play (UPnP) is a set of protocols that allows devices to connect seamlessly and simplifies the deployment
of home and office networks. UPnP achieves this by issuing UPnP device control protocols designed upon open, Internet-based
communication standards.
The first step in UPnP networking is discovery. When a device is added to the network, the UPnP discovery protocol allows that
device to broadcast its services to control points on the network. Similarly, when a control point is added to the network, the
UPnP discovery protocol allows that control point to search for UPnP enabled devices on the network.
Once a control point has discovered a device its next step is to learn more about the device and its capabilities by retrieving the
device's description from the URL provided by the device in the discovery message. After a control point has retrieved a
description of the device, it can send actions to the devices service. To do this, a control point sends a suitable control message
to the control URL for the service (provided in the device description).
When a device is known to the control point, periodic event notification messages are sent. An UPnP description for a service
includes a list of actions the service responds to and a list of variables that model the state of the service at run time.
If a device has a URL for presentation, then the control point can retrieve a page from this URL, load the page into a Web
browser and depending on the capabilities of the page, allows a user to control the device and/or view device status.
UPnP Configuration
This page allows you to enable or disable UPnP, and to set time out values.
Object
• UPNP Status
• Advertising Duration
• TTL Value
Figure 4-2-22 UPnP Configuration screenshot
Description
Enables/disables UPnP on the device.
This sets the duration of which a device will advertise its status to the control
point.
Range: 60-86400 seconds;
Default: 100 seconds
Sets the time-to-live (TTL) value for UPnP messages transmitted by the device.
Range: 1-255;
Default: 4
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User's Manual of IGSW-2840