Accton Technology 24S EtherHub-24s Verifying Hub Status, Applications, Product Specifications

EtherHub-24s

Verifying Hub Status

Check each connection by comparing the indicators with the following table.

LED	State	Indication
Power	On	Hub receiving power.
Collision%	On	Indicates percentage of collisions out of total packets.
Utilization%	On	Indicates percentage of LAN bandwidth utilized.
Partition	On	Port partitioned due to an abnormal network condition.
Link/Traffic	On	Port has established a valid network connection.
	Flashing	Port is receiving packets; blinking proportional totraffic.

Applications

Flexible Configuration - This hub is not only designed to provide network access for 10Mbps connections, but also to provide a wide range of options in setting up network connections. It can be used as a simple stand-alone hub, or can be cascaded to any compatible hub or switch. A sample configuration diagram is shown in the following figure.

Product Specifications

Base Unit
Access Method	CSMA/CD, 10 Mbps
Standards Conformance	IEEE 802.3 10BASE-T, 10BASE2, AUI
Communication Rate	10 Mbps
Media Supported	10BASE-T- 100W Category 3,4,5 UTP/STP,
	10BASE2 - thin Ethernet coaxial cable,
	10BASE5 - thick Ethernet coaxial cable1,
	10BASE-F- ST-type multimode fiber1
	(1: via suitable AUI transceiver)
Number of Ports	24 RJ-45 ports, 1 BNC port, and 1 AUI port
Indicator Panel	Power, utilization, collisions, partition, link/traffic
Dimensions	440 x 172 x 43 mm (17.32 x 4.58 x 6.77 in)
Weight	4.42 kg (9.74 lb)

	Quick Installation Guide
Input Power	100~240 VAC, 50/60 Hz (built-in full-range power module)
Power Consumption	15 Watts maximum
Maximum Current	0.11ARMS max. @ 110V, 0.05RMS max. @ 240V
Heat Dissipation	51 BTU/hr
Temperature	0°C to 50°C (32 to 122°F) Standard Operating
Humidity	5% to 95% (Noncondensing)
Certification	CE Mark
Emissions	FCC Class A, VCCI Class A, CISPR 22 Class A
Immunity	IEC 801-2/3/4
Safety	UL, CSA, TÜV/GS
Network Criteria
Hub-to-Workstation Distance	100 meters maximum using twisted-pair cable
Inter-hub Distance (MDI Port)	100 meters using twisted-pair cable (4 hub cascade)
	(100 meters = 328 feet)

Troubleshooting

Diagnosing Hub Indicators

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: 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.

Symptom: Link indicator does not light up (green) 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 attached device. Check the adapter on the attached device and cable connections for possible defects. See if your cable is functioning properly by using it for another port and attached device that displays valid indications when connected to the network. Replace the defective adapter or cable if necessary. Also verify that you have not exceeded specified limits for any attached media as summarized in the following table:

Media Type	Max Length	Max Nodes	Other
Twisted Pair	100 meters (328 feet)	1000
Thin Ethernet	185 meters (607 feet)	30	0.5 meters1
Thick Ethernet	500 meters (0.3 miles)	500	50 meters2
Fiber Optic (10 Mbps)	2000 meters (1.24 miles)	link pair

1 - Minimum distance between nodes.

2 - Maximum length of drop cable from AUI port to transceiver. (0.5 meters = 1.64 feet; 50 meters = 164 feet)

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