Lantronix LFH16-S Installation Manual Download Page 4

1.2 Features

The LFH8-S provides eight 100BASE-TX ports and the LFH16-S
provides 16 100BASE-TX ports for Fast Ethernet connectivity

The LFH8-S/LFH16-S comply with the IEEE 802.3u Fast Ethernet
standard

Supports Category 5 Unshielded Twisted Pair (UTP) or Shielded
Twisted Pair (STP) cable

An Uplink port on the front panel enables the LFH8-S/LFH16-S to
be connected to another 100BASE-TX hub using a straight-through
cable

The LFH8-S and LFH16-S stackable architectures enable up to 6
hubs to be stacked together for a total of up to 96 ports

Performs preamble regeneration, signal retiming and restoration,
extension of fragmented packets, automatic partitioning, and jabber
truncation

Global Power and individual port Link/Receive, Partition, and
Utilization% LEDs indicate system status

The internal power supply automatically adjusts to the voltage
range of the AC power being supplied (100VAC/60Hz to
240VAC/50Hz), with no change in settings or fuse required

The LFH8-S and LFH16-S come with metal brackets that can be
easily attached to the hub for mounting in a standard 19 inch equip-
ment rack

FCC Class A, CE, UL, CUL, TUV certifications

Five year limited warranty

3

Summary of Contents for LFH16-S

Page 1: ...LFH8 S LFH16 S Fast Stackable Hubs Installation Guide ...

Page 2: ...hecklist 5 2 2 Planning 100BASE TX Networks 5 2 3 Installation 7 2 4 Mounting 8 2 5 Stacking LFH8 S LFH16 S Hubs 9 2 6 Connecting the LFH Hub 11 CHAPTER 3 LED Indicators 3 1 Power LED 12 3 2 Partition LED 12 3 3 Link Receive LEDs 13 3 4 Utilization LEDs 13 3 5 System Status LEDs 13 Limited Warranty 14 Technical Support 14 Declaration of Conformity 16 1 ...

Page 3: ...nsion the LFH8 S LFH16 S provides an uplink port that makes it easy to cascade the hub to another Fast Ethernet hub or hub stack The LFH8 S LFH16 S hubs can be placed on a table top or rack mounted and provide the ideal solution for small to large 100BASE TX Fast Ethernet networks The LFH hubs are designed to comply with the IEEE 802 3u Fast Ethernet standard To insure network reliability the LFH8...

Page 4: ... 6 hubs to be stacked together for a total of up to 96 ports Performs preamble regeneration signal retiming and restoration extension of fragmented packets automatic partitioning and jabber truncation Global Power and individual port Link Receive Partition and Utilization LEDs indicate system status The internal power supply automatically adjusts to the voltage range of the AC power being supplied...

Page 5: ... 100Mbps ports one crossover ÒUplinkÓ port Two 25 pin stacking connectors Stackable Maximum 6 hub stack stacking cable included LED indicators Power Partition Link Receive and Utilization indi cators Dimensions 356mm x 230mm x 44mm L x W x H Environment Temperature Operating 0 C to 40 C Storage 20 C to 70 C Humidity Operating 10 to 90 RH Power 100 VAC 60Hz to 240 VAC 50Hz Certifications FCC Class ...

Page 6: ...ause new hubs and new wiring configurations are necessary 10BASE T hubs are incapable of sending or receiving data at 100Mbps so a 100BASE TX network requires a 100BASE TX hub 100BASE TX supports a maximum length of 100 meters from a network station to a hub The total network diameter the maximum cable distance between any two stations on the network is 205 meters for 100BASE TX as opposed to 500 ...

Page 7: ...ASE TX network diameter Not only does 100BASE TX have a different data transmission scheme it also has different cabling requirements As noted above 100BASE TX requires data grade Category 5 UTP cable Some installations have Category 5 cabling but do not have wall outlets and wiring closet punch down blocks that meet Category 5 require ments 100BASE TX requires that all wiring and accessories meet...

Page 8: ... hub Figures 2 1 and 2 2 show the layout of the front panels Figure 2 1 LFH8 S Front Panel Figure 2 2 LFH16 S Front Panel 7 1 2 3 4 5 6 7 8 P W R UTILIZATION PARTITION LINK RECEIVE PORT NO LFH8 S 10 60 1 2 3 4 5 6 7 8 Uplink 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 P W R LINK RECEIVE PORT NO LFH16 S 10 60 9 10 11 12 13 14 15 16 Uplink PORT NO PARTITION LINK RECEIVE UTILIZATION PARTIT...

Page 9: ...r than 5 meters Network cable segments can be connected to or disconnected from the LFH hub while the power is on Plugging in or removing network cables while your hub is operating will not interrupt the operation of the hub When placing your LFH hub you need to avoid dusty locations and electromagnetically noisy areas 2 4 Mounting Your LFH8 S or LFH16 S hub is delivered with two brackets for moun...

Page 10: ...and 16 port hubs The maximum allowable any of LFH8 S and LFH16 S hubs in a stack are 6 hubs When the LFH hubs are stacked together they are counted as a single Fast Ethernet repeater and the entire stack can be chained as a unit to another Class II hub or hub stack To stack two LFH8 S LFH16 S hubs together see Figure 2 4 1 Position the LFH hubs with one on top of the other 2 Connect one end of the...

Page 11: ...onnectors on the top LFH hub 3 Connect a stacking cable from the other connector on the middle LFH hub to one of the connectors on the bottom LFH hub Figure 2 5 Stacking Six LFH8 S LFH16 S Hubs 100 240 VAC 1A 50 60 Hz AC IN OUT 100 240 VAC 1A 50 60 Hz AC IN IN OUT 100 240 VAC 1A 50 60 Hz AC IN IN OUT 100 240 VAC 1A 50 60 Hz AC IN IN OUT 100 240 VAC 1A 50 60 Hz AC IN IN OUT 100 240 VAC 1A 50 60 Hz ...

Page 12: ...pes Make sure that the length of the straight through cable between the LFH hub and the other device does not exceed 100 meters including all patch cables and cross connect wires Make sure that the length of the straight through cable between two hubs does not exceed 5 meters Straight cable Crossover cable Pin 1 TD RD Pin 2 TD RD Pin 3 RD TD Pin 6 RD TD LFH8 S Ports 1 8 Uplink Port LFH16 S Ports 1...

Page 13: ...nected to the power outlet and is properly inserted into the power connection on the LFH hub Determine whether or not the outlet is functional by plugging another device into the receptacle 3 2 Partition LED The yellow Partition LED is located on the front panel and labeled as Partition When there are too many collisions received from a specific station s the hub will automatically partition it to...

Page 14: ...mit and receive functions of the port will be disabled 3 4 Utilization LEDs The Utilization LEDs is defined to indicate the current traffic utiliza tion of the network This hub supports 6 LEDs to indicate different traffic utilization levels The table below shows the different status indications of the Utilization LEDs 10 20 Green 30 40 Yellow 50 60 Yellow 3 5 System Status LEDs 13 LED summary tab...

Page 15: ...ase check the hub configuration settings cables connectors network terminators and other network components for compatibility Write a description of the problem including what problems occurred and when they occurred Also please have the following information ready if calling for support services Model number serial number Purchase date Network configuration Application environment Hardware softwa...

Page 16: ...this equipment in a residential area is likely to cause interference in which case the user at his or her own expense will be required to take what ever measures may be required to correct the interference NOTE The RJ45 ports are not for telephone use CAUTION Not for installation in air ducts plenums or other environmental air handling spaces Changes or modifications to this device not explicitly ...

Page 17: ...e Hubs Model Number LFH8 S LFH16 S conforms to the following standards EMC EN55022 1988 CISPR 22 1985 Class B EN60555 2 1987 Class A prEN55024 2 1990 IE801 2 1991 4KV CD 8KV AD prEN55024 3 1991 IE801 3 1984 3V V m prEN55024 4 1992 IE801 4 1988 1KV power line 0 5KV signal line ManufacturerÕs Contact Director of Quality Assurance Lantronix 15353 Barranca Parkway Irvine CA 92618 USA Tel 949 453 3990 ...

Page 18: ...15353 Barranca Parkway Irvine CA 92618 949 453 3990 Fax 949 453 3995 Sales 800 422 7055 Support 800 422 7044 PART NO 900 143 Rev A ...

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