Chapter 8 Basic Setting
GS1350 Series User’s Guide
101
8.8 PoE Status
A powered device (PD) is a device such as an access point or a switch, that supports PoE (Power over
Ethernet) so that it can receive power from another device through an Ethernet port.
In the figure below, the IP camera and IP phone get their power directly from the Switch. Aside from
minimizing the need for cables and wires, PoE removes the hassle of trying to find a nearby electric
outlet to power up devices.
Figure 78
Powered Device Examples
Extended
Range
Select this check box to extend the PoE range up to 250 meters.
After you enable this feature, the port will transfer data at a rate up to10 Mbps in full duplex
mode. If a PD is connected to the port, the Switch follows the IEEE 802.3at PoE+ standard to
supply power to the connected PD during power-up.
Note: Maximum PoE power that can be supplied to a PD at 250 m is 15 W.
Note: If you enable extended range on a port after the connected PD starts up
completely, you must disable PoE and enable it again or disconnect and
reconnect the cable to the port for extended mode to take effect.
Note: The port speed and duplex mode you previously configured will be applied
automatically when the extend range feature is disabled.
Flow Control
A concentration of traffic on a port decreases port bandwidth and overflows buffer memory
causing packet discards and frame losses.
Flow Control
is used to regulate transmission of signals
to match the bandwidth of the receiving port.
The Switch uses IEEE802.3x flow control in full duplex mode and backpressure flow control in half
duplex mode.
IEEE802.3x flow control is used in full duplex mode to send a pause signal to the sending port,
causing it to temporarily stop sending signals when the receiving port memory buffers fill.
Back Pressure flow control is typically used in half duplex mode to send a "collision" signal to the
sending port (mimicking a state of packet collision) causing the sending port to temporarily stop
sending signals and resend later. Select
Flow Control
to enable it.
802.1p Priority
This priority value is added to incoming frames without a (802.1p) priority queue tag. See
Priority
Queue Assignment
in
for more information.
Apply
Click
Apply
to save your changes to the Switch’s run-time memory. The Switch loses these
changes if it is turned off or loses power, so use the
Save
link on the top navigation panel to save
your changes to the non-volatile memory when you are done configuring.
Cancel
Click
Cancel
to begin configuring this screen afresh.
Table 32 Basic Setting > Port Setup (continued)
LABEL
DESCRIPTION
