User manual
20
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Configuration Items
Description
Flow Control
Whether selecting flow control to the port. Only can selecting flow control
when the port enable. The default is off.
The described Electric port is the common network device RJ-45 port, commonly known as "crystal
head", it's is a twisted-pair Ethernet interface type. This interface can be used in 10Base-T, 100Base-Tx
and 1000Base-Tx Ethernet, transmission media is twisted pair, but according to different bandwidth
media have different requirements, in particular, 1000Base-Tx Gigabit Ethernet connection, at least to
use cat5e.
Port Speed
Port speed shows the connecting speed of the port. It includes 3 kinds of speed: 10M, 100M and
auto-negotiation.
10M uses 10base-T standard and UTP cable for connection. When the port is in 10M speed, Link/Act
indicator will blink continuously while data transmitting and status indicator of 10M/100Mbps will stay
OFF.
100M uses 100Base-TX standard and UTP/STP cable for connection. When the port is in 100M speed,
Link/Act indicator will blink continuously while data transmitting. 100M fiber port uses 100Base-FX
standard and single/multi-mode fiber for connection. Main fiber of 100Base-FX standard includes: 62.5nm
multi-mode fiber and 50nm multi-mode fiber. Auto-negotiation includes 2 kinds of speed according the
capability of the other end: 10M and 100M.
Port Enable
This item provides a device to enable/disable the port. When choosing disable, the device would cut
off power supply of this port. Even if other device is connected to this port, all status indicators of this port
are OFF. Only enable this port, all settings about this port will be valid. This item provides a kind of safety
mechanism to protect the port from illegal use. It is not allowed to disable all the ports.
Duplex Mode
Full duplex of the switch means switch can transmit and receive data at the same time. Half duplex of
the switch means switch can transmit or receive data in a certain time. Generally the speed will choose
auto-negotiation so that the port can automatically judge the connection type of the device connected to it
and automatically adjust the connection type to ensure the maximum compatibility.
Flow Control
Flow control is used to prevent the frames from discard while port is blocked. This method is to send
back the blocking signal to its original address while sending or receiving buffer area start to overflow. It
limits the abnormal flows into a certain range. Flow control can be effective in preventing large amounts of
data in the network instant impact on the network to ensure the efficient and stable user network running.
