Chapter 4: Operation
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Page 24
4.2
Auto-negotiation and Speed-sensing
All eight RJ-45 ports independently support auto-negotiation for speed in
10BASE-T and 100BASE-TX modes. Operation is according to the IEEE 802.3u
standard.
When a RJ-45 cable connection is made, and each time a LINK is enabled,
auto-negotiation takes place. The LBH08x/LBH18x advertises its capability for 10 or
100 Mbps speed, and the device at the other end of the cable should similarly
advertise / respond and both sides will agree to the speed being used. Depending
upon the device connected, this will result in agreement to operate at either 10 Mbps
or 100Mbps speed.
When the ‘
LINK/ACT’
LED is ON, steady ON indicates LINK with no traffic,
blinking ON indicates the port is transmitting / receiving. The port has auto-negotiated
for operation. (If a LBH08x or LBH18x RJ-45 port is connected to a non-negotiating
device, it will default to 10 Mbps speed and half-duplex mode, per the IEEE 802.3u
standard).
4.3
Auto-Cross (MDIX) and Auto-negotiation, for RJ-45 ports
The RJ-45 ports independently support auto-cross (MDI or MDIX) in
auto-negotiation mode and will work properly with all the other connected devices
with RJ-45 ports whether they support auto-negotiation (e.g., 10Mbps hub, media
converter) or fixed mode at 10Mbps or 100Mbps Half/Full Duplex (managed
switch) or not. No cross-over cable is required while using the LBH08x/LBH18x
copper port to other devices. Operation is according to the IEEE 802.3u standard.
4.4 LED
Indicators
PWR:
Illuminates GREEN, steady on when power applied.
10/100:
Per port, ON = 100Mbps; OFF = 10 Mbps
(when LINK is made)
LINK/ACT:
Per port, steady ON for LINK with no traffic, blinking
indicates port is transmitting and receiving.
F/H:
ON = Full-Duplex and Link,
OFF = Half-Duplex and / or no Link
