Buffalo BS-GU2008P User Manual

TM
BS-GU2008P
User Manual
Package Contents
The package contains the items shown below. If any items are missing, please
contact the dealer where you purchased the BS-GU2008P.
The appearance of the BS-GU2008P may vary from the illustration.
• Switch (main unit) ........................................................................................................................ 1
• AC adapter....................................................................................................................................... 1
• Power cable retainer band......................................................................................................... 1
• Rubber feet .................................................................................................................................... 4
• Serial number stickers ............................................................................................................... 2
• User manual (this document)................................................................................................... 1
• Warranty .......................................................................................................................................... 1
1. Indicators 3. PoE ports
2. Loop prevention switch
1. Indicators
Indicators are located on the front panel of the product. The functions of each
indicator are shown below.
PoE Limit (Orange)
On: PoE is supplying more than 30 watts of power to all devices. For
temperatures above 40℃ (104°Ｆ), don't connect devices that
draw more than 30 watts of PoE power total.
Blinking: PoE power has been disabled to some ports because the
maximum 50 watts of PoE power was exceeded. PoE power was
disabled for ports in order of descending port number until the
total PoE output power was less than 50 watts.
Off: Normal
Loop (Red)
Blinking: Loop blocked (blinks once per second)
Off: Normal
Power (Green)
On: Power on
Off: Power off
PoE (Green or Orange)
On (Green): PoE power is available
On (Orange): Overcurrent or excessive power draw
Off: PoE power is disabled
1000 Mbps (Green)
On: 1000 Mbps Link
Blinking: If a loop is blocked, the LED for the blocked port blinks once
per second.
Off: 100 Mbps or 10 Mbps Link, No Link
Link/Act (Green)
On: Link established
Blinking: Data transfer
If a loop is blocked, the LED for the blocked port blinks once
per second.
Off: Link not established
2. Loop prevention switch
This switches loop prevention on and off. After flipping the switch, disconnect
and reconnect the power cable.
3. PoE ports
These Ethernet ports support PoE. Connect devices that need Ethernet power
to these ports. Each port can supply up to 15.4 watts.
The maximum total supply for all 6 ports varies according to the operating
temperature. If it is below 40℃ (104°Ｆ), 50 watts. If it is above 40℃ (104°Ｆ),
30 watts.
Connect Ethernet devices to the switch in ascending order of port
number. If the maximum total power for PoE exceeds 50 watts, power to
ports will be disabled in descending order by port number until the total
output power for PoE is below 50 watts.
Layout
4. Uplink ports
5. Power connector
All ports support autonegotiation. The optimal duplex mode (full duplex or
half duplex) and transfer speed (1000, 100, or 10 Mbps) are selected
automatically.
4. Uplink ports
Connect other hubs or switches to these ports. These ports don't support PoE.
5. Power connector
Connect the included AC adapter to this connector. Secure the AC adapter
cable with the included cable retainer.
①
Installation
Precautions for Installation
• Do not install the device in an unstable location such as on an unsteady table or
an inclined surface.
• Do not place another hub or object that generates heat on this unit.
• Please route all cables properly to prevent people from tripping over them.
• Ensure the air vents on the product are not blocked by other equipment or walls.
• Only use the AC adapter included with the product. Using other AC adapters
may result in damage or re.
Floor or Shelf Mounting
Attach the supplied rubber feet to the bottom corners of the unit before use.
Mounting to a Metal Surface
To mount to a metal surface, such as the side of a steel desk, use the "BS-MGK-A
Magnet Kit" (sold separately).
Caution: Do not put floppy discs, magnetic cards, or other magnetic storage media
near magnets. Doing so may delete or corrupt data.
Note: If the switch is secured by the magnet alone, it should be no more than 75
cm (29.5 in) from the floor.
Wall Mounting
To mount the unit to a wall, use 2 screws (not included) with the dimensions shown
below. Install the screws 113 mm (4.4 in) apart and slide the mounting holes in the
base of the BS-GU2008P over them.
Mounting holes Magnet mounting holes
Bottom
Loop Prevention
This unit can detect and prevent network loops that can cause interference in the
network.
What is a Loop?
If both ends of an Ethernet cable are connected to the same hub, or when multiple
connections exist between two hubs, data may be sent in a loop around the
network, wasting network capacity and never getting to its destination. This
continuously circulating data may interfere with other network communication.
Loop Prevention
･Off: Loops are not blocked.
･On:
If a network loop is detected, the port is blocked until the loop is fixed. Also,
the loop, link/act, and 1000 Mbps (if active) LEDs for the blocked port blink
once per second.
Turning Loop Prevention On and Off
1. Use the switch on the front of the BS-GU2008P to turn loop prevention on or off.
2. After changing the switch position, disconnect and reconnect the power cable. The
change will take effect when the BS-GU2008P has rebooted.
Notes:
・ While loop prevention is enabled, the BS-GU2008P will send a loop detection
packet through the network every two seconds. If these packets disrupt your
network in any way, disable loop prevention.
・ Loop prevention cannot detect or block all types of loops.
When a Loop is Detected
Reconnect your Ethernet cabling, making sure that there are no redundant
connections.
② ③
Use screws where this section is
2 mm or less.
2