GarrettCom 500-Series User Manual
Page 11
Magnum 500-Series Switching Hubs
Installation and User Guide (08/98)
GARRETT
6
2.2.2
10 and 100Mb ports, full- or half-duplex and auto-negotiation modes
Figure 2.2.2: two@100Mb copper ports (528 model), 1@100Mb copper and
1@100Mb fiber ports (528F models), and 8@10Mb ports
All Magnum 500-Series Switching Hubs provide eight 10Mb switched ports.
All 10Mb switched ports are independently auto-negotiating for selecting to operate in
full-duplex mode, and will independently default to half-duplex mode when the 10Mb
device at the other end is half-duplex or is not an auto-negotiating device.
The two Fast Ethernet switched ports on the Magnum 528 and 528F normally
are set (by factory default) to operate at fixed 100Mb speed for guaranteed high-speed
performance. In this case, each of these two ports will run at 100Mbps at all times. The
user may select full- or half-duplex mode per-port with a manual switch for flexibility to
adapt to any type of Fast Ethernet devices. The Full / Half-duplex manual switches are
located on the front panel next to their corresponding Fast Ethernet ports.
For operation in Fast Ethernet auto-negotiating mode (copper only), internal
jumpers must be set. The “AUTO” LED will then be lit to show that auto-negotiation is
in operation. See Sections 4.4 and 3.4 for additional details.
On Magnum 528 units, there are three LED’s for each Fast Ethernet port. One
indicates operation at 100Mb speed when lit, one indicates operation at 10Mb speed
when lit (possible when auto-negotiation is enabled only, copper ports), and one is lit to
indicate full-duplex operation (when it is OFF, operation is half-duplex). A twisted pair
or fiber cable must be connected to each 100Mb port and a proper link (LK lit) must be
made with the device at the other end of the cable in order for these LEDs to provide
valid indications of operating conditions.
PWR
RX
LK
AUTO
F/H
F
H
F
H
L K RX
F/H
100
10
TX
RX
100 Mb
1 2 3 4 5 6 7 8
LK/RX
FDX
UPLINK
10Mb
AUTO
PWR
F/H
F/H
10
LK/RX
FDX
100
100
10
1
2