Accton Technology CheetaHub Power Fast Ethernet Dual-Speed Stackable Hubs ユーザーズマニュアル

Cascading Hubs with the Daisy-Chain Port - You can easily connect to another

hub or switch via the RJ-45 MDI daisy-chain port on the front panel.  The figure

below shows a sample configuration.  When connecting to 10 Mbps Ethernet, the

maximum number of hubs that can be cascaded is four (with up to 100 meters or

328 feet of cable allowed between each hub).  However, when connecting to another

Fast Ethernet hub, the number of hubs that can be cascaded is limited to two, and

the total network span allowed is only 205 meters (672 feet).
Stack of Hubs - You can stack up to six hubs using the stack ports on the rear

panel.  A CheetaHub stack can include up to 96 RJ-45 ports.  Also note that if more

than one hub with internal switching (EH3008N-SW or EH3016N-SW) is placed in

the stack, switching between stack segments will be managed by the uppermost unit

in the stack, and internal switching will be disabled for all other units.
Connecting to a Network Backbone - You can easily connect to a collapsed backbone

switch via the RJ-45 MDI daisy-chain port on the front panel.  Because a switch breaks

up the collision domain, it can be used to connect a group of CheetaHub stacks.

Access Method

CSMA/CD, 10 Mbps or 100 Mbps

Standards Conformance

IEEE 802.3 10BASE-T, IEEE 802.3u 100BASE-TX,

IEEE 10BASE2 (EH3016N/SW)

Communication Rate

10/100 Mbps on RJ-45 ports, 10M on BNC port

Media Supported

10BASE-T  - 100

Ω 

Category 3,4,5 twisted-pair

100BASE-TX - 100

Ω 

Category 5 twisted-pair

10BASE2  - thin Ehternet coaxial cable (EH3016N/SW)

Number of Ports

8 RJ-45 ports (EH3008N/SW)

16 RJ-45 ports (EH3016N/SW)

1 BNC port (EH3016N/SW)

1 MDI daisy-chain port (replaces 1 station port)

All models have 2 stack ports on the rear panel

Indicator Panel

LEDs for monitoring power, activity, collision, port link

(10/100M), port partition, and utilization

Input Power (full range)

100 to 240V (+6% ~ -10%), 50 to 60 Hz (±3Hz)

      EH3008N                              EH3016N

Power Consumption

15 Watts max.

27 Watts max.

Heat Dissipation

51 BTU/hr max.

92 BTU/hr max.

Maximum Current (110/240V) 0.10 / 0.05 A

RMS

0.23 / 0.11 A

RMS

Dimensions

251x116x37 mm

273x166x43 mm

9.88x4.56x1.46 in

10.75x6.54x1.69 in

Weight

0.83Kg (1.83lb)

1.65Kg (3.64lb)

Temperature

0~40°C (32~104°F) Standard Operating,

-25~70°C (-13~158°F) Storage

Humidity

5% to 95% (Non-condensing)

Certification

CE Mark

Emissions

EH3008N: FCC Class B, VCCI Class B, CISPR Class B

EH3016N: FCC Class A, VCCI Class A, CISPR Class A

Immunity

IEC 1000-4-2/3/4/6

Safety

CSA/NRTL, TÜV/GS

Network Bridging Function

Filtering, forwarding and learning

Switching Method

Store-and-forward

Address Table

4K entries

Queue Buffer

9K bytes / 10M port, 87K bytes / 100M port

Filtering/Forwarding Rate

Line speed

The hub can be easily monitored through panel indicators to assist the network

manager in identifying problems.  This section describes common problems you may

encounter and possible solutions.

Symptom: Link 10/100M indicator does not light up after making a connection.

Cause:

Network interface (e.g., a network adapter card on the attached device),

network cable, or hub port is defective.

Solution: Verify that the hub and attached device are powered on.  Be sure the cable is

plugged into both the hub and corresponding device.  Verify that the proper

cable type is used and its length does not exceed specified limits.  Check the

adapter on the attached device and cable connections for possible defects.

Replace the defective adapter or cable if necessary.

Symptom: Power indicator does not light up (green) after power on.

Cause:

Defective power outlet, power cord, or internal power supply.

Solution: Check the power outlet by plugging in another device that is functioning

properly.  Check the power cord with another device.  If these measures fail

to resolve the problem, have the unit's power supply replaced by a qualified

Accton distributor.

If the Power indicator does not turn on when the power cord is plugged in, you may

have a problem with the power outlet, power cord, or internal power supply as

explained in the previous section.  However, if the unit powers off after running for a

while, check for loose power connections, power losses or surges at the power

outlet, and verify that the fan on back of the unit is unobstructed and running prior to

shutdown.  If you still cannot isolate the problem, then the internal power supply may

be defective.  In this case, contact your Accton distributor for assistance.