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1000 PARK DRIVE • LAWRENCE, PA 15055-1018 • 724-746-5500 • FAX 724-746-0746

January 2002

LH8000A-M,
LH8000A-C

Dual-Speed Stackable Hub

Installation and User Guid

1 2 3 4 5 6 7 8

COL

ACT

100 10

PWR

100

1 2 3 4 5 6 7 8

100 10

1 2 3 4 5 6 7 8

COL

ACT

PWR

100

1 2 3 4 5 6 7 8

UPLINK

1 2 3 4 5 6 7 8

COL

ACT

100 10

PWR

100

1 2 3 4 5 6 7 8

UPLINK

BLACK BOX

Dual Speed Stackable Hub

Order

toll-free

in the U.S. 24 hours, 7 A.M. Monday to midnight Friday:

877-877-BBOX

FREE technical support, 24 hours a day, 7 days a week: Call

724-746-5500

or fax

724-746-0746

Mail order:

Black Box Corporation

, 1000 Park Drive, Lawrence, PA 15055-1018

Web site:

www.blackbox.com

• E-mail:

[email protected]

Содержание LH8000A-C

Страница 1: ...00 10 1 2 3 4 5 6 7 8 COL ACT PWR LK RX BR 100 1 2 3 4 5 6 7 8 UPLINK 1 2 3 4 5 6 7 8 COL ACT 100 10 PWR LK RX BR 100 1 2 3 4 5 6 7 8 UPLINK UPLINK BLACK BOX Dual Speed Stackable Hub Order toll free i...

Страница 2: ...on Velcro is a trademark of Velcro U S A UL is a registered trademark of Underwriters Laboratories Important The LH8000A Dual Speed Hubs contain no user serviceable parts Attempted service by unauthor...

Страница 3: ...llation and User Guide ii Contacting Black Box Corporation Please use the mailing address phone and fax numbers listed below Black Box Corporation 1000 Park Drive Lawrence PA 15055 Phone 724 746 5500...

Страница 4: ...ipment is operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take what...

Страница 5: ...r el fabricante 7 El aparato el ctrico debe ser montado a la pared o al techo s lo como sea recomendado por el fabricante 8 Servicio El usuario no debe intentar dar servicio al equipo el ctrico m s al...

Страница 6: ...ante 15 En caso de existir una antena externa deber ser localizada lejos de las lineas de energia 16 El cable de corriente deber ser desconectado del cuando el equipo no sea usado por un largo periodo...

Страница 7: ...of service in some situations Repairs to certified equipment should be made by an authorized Canadian maintenance facility in this case your supplier Any repairs or alterations made by the user to thi...

Страница 8: ...0 3 0 INSTALLATION 12 3 1 Locating the Dual Speed Hubs 12 3 1 1 Table Top or Shelf Mounting 12 3 1 2 Wall or Vertical Surface Mounting 12 3 2 Connecting Ethernet Media 13 3 2 1 Connecting TP RJ 45 CAT...

Страница 9: ...E 802 3u Packet Processing Between Domains internal 10 100 switch or bridge Filtering and Forwarding Rate from 100Mbps ports 148 800 pps max Filtering and Forwarding Rate from 10Mbps ports 14 880 pps...

Страница 10: ...the up link works the same at 10Mb or 100Mb Packaging Enclosure High strength metal Metal mounting brackets included Suitable for wiring closet shelf wall or desktop mounting Dimensions 9 75 in D x 8...

Страница 11: ...tacking Cable Model LH8000A C add on no bridge inside units only 1 Set of metal clips and screws for wall mounting 1 AC Power Cord U S and other 115 vac locations only 1 Installation and User Guide Re...

Страница 12: ...oth a 10Mb and a 100Mb hub in one As LH8000A Dual Speed units are stacked the two shared traffic domains automatically expand to support all of the ports in the stack Any combination of 10Mbps and 100...

Страница 13: ...sing switch available to interconnect the two speed domains or if only 100Mbps devices are connected and the 10Mbps domain is unused or vice versa or if dual speed operation with two unconnected and u...

Страница 14: ...nternal power supply is auto ranging for any AC power input of 115 230 vac 50 60 Hz An internal DC power supply is optional 2 2 2 10 100 Speed Auto sensing All eight RJ 45 twisted pair ports support a...

Страница 15: ...be able to function properly when more than one is present Use LH8000A M models un stacked or with only 1 Model LH8000A M in an LH8000A stack See Section 2 7 Example 3 When stacking LH8000As please m...

Страница 16: ...f 10Mb and of 100Mb packets is maintained correctly even when users move their connection or change speed or power down The LH8000A M s bridge module is implemented as a daughter board LH8000A units h...

Страница 17: ...each other Switching provides full bandwidth in each domain unaffected by local traffic on the other domain One LH8000A M per stack supports switching for all ports Stackable for flexible expansion LH...

Страница 18: ...bps network without having to change it Nodes that are capable of 100Mbps speed can be moved to any LH8000A dual speed port and will automatically operate at the higher speed The dual speed ports on t...

Страница 19: ...he 100Mbps traffic domain obeys all of the rules of 100Mbps Fast Ethernet shared networks hop counts PDVs cable types cable distances etc and can be treated as one 100Mb repeater Both traffic domains...

Страница 20: ...of the front to visually monitor the status LEDs Keep an open area around the unit so that cooling can occur from the small fan in the bottom rear while the unit is in operation 3 1 1 Table Top or She...

Страница 21: ...isted pair cables 1 Using standard twisted pair media insert either end of the cable with an RJ 45 plug into the RJ 45 connector of the port Note that even though the connector is shielded either unsh...

Страница 22: ...es BT 2 TX DTEs 100 2 FX DTEs 100 1 FX and 1 TX DTE 100 1 T4 and 1 TX or FX DTE 127 Class I Repeater 140 Class II Repeater with any combination of TX and FX ports 92 Note the delay is only 80 Bit Time...

Страница 23: ...y be used to cascade the LH8000As Note that this inter repeater cable length may be increased by shortening the lengths of the 100m hub to user cable segments It is also possible to cascade a group of...

Страница 24: ...ential is accordingly better with LH8000As than with hubs that merely meet the standard Table 3 2 2c shows maximum cable lengths for common network configurations using industry standard repeater PDV...

Страница 25: ...than 100BASE TX such as 10BASE T When 100Mbps operation is agreed and in use the 100Mbps LINK ACT LED is illuminated steady ON if no traffic or blinking when there is traffic 3 3 Powering the Dual Sp...

Страница 26: ...stination address contained in each packet If the destination address is on the same domain from which the packet originated then it is filtered and not forwarded to the other domain If the destinatio...

Страница 27: ...new node address will be added to the internal Address Table When a new node address packet comes into a port for the first time then the new source address is learned at the same time that the packe...

Страница 28: ...ridge module is present in the unit model LH8000A M OFF when no bridge module is present model LH8000A C COL Two collision LED s one for each traffic domain 10 and 100Mbps Blinks intermittently when a...

Страница 29: ...onents of the network are working 2 Check the cables and connectors to make sure that they have been properly connected and the cables wires have not been crimped or in some way impaired during instal...

Страница 30: ...and duration of the problem when the problem occurs the components involved in the problem any particular application that when used appears to create the problem or make it worse 5 3 Shipping and Pac...

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