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CUSTOMER

SUPPORT

INFORMATION

Order

toll-free

in the U.S.: Call

877-877-BBOX

(outside U.S. call

724-746-5500

)

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

724-746-5500

or fax

724-746-0746

Mailing address:

Black Box Corporation

, 1000 Park Drive, Lawrence, PA 15055-1018

Web site:

www.blackbox.com

• E-mail:

[email protected]

AUGUST 2001

LB5953A
LB5954A

16-Port Stack Hub
24-Port Stack Hub

Summary of Contents for LB5953A

Page 1: ...4 746 5500 FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mailing address Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox...

Page 2: ...equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be necessary to correct the interference Change...

Page 3: ...amente con carritos o pedestales que sean recomendados por 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...

Page 4: ...camente de acuerdo a las recomendaciones del fabricante 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...

Page 5: ...4 16 AND 24 PORT STACK HUBS TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners...

Page 6: ...ternal Components 10 3 1 1 Front Panel 10 3 1 2 Rear Panel 11 3 2 Installing the Hub 11 3 2 1 Installation 11 3 2 2 Rack Mounting 12 4 Indicators 13 4 1 Hub State Indicators 13 4 2 Port State Indicato...

Page 7: ...nk 1 expansion slot LB5954A 24 MDI X 1 MDI II uplink 1 expansion slot Network Media Ethernet Category 3 or better UTP Fast Ethernet Category 5 UTP STP 100 ohm twisted pair 1 2 Hub to Hub Cascading Num...

Page 8: ...0 to 70 C Humidity 10 to 90 noncondensing Emissions FCC Class A CE VCCI I Safety cUL TUV Power Supply 100 to 240 VAC 50 to 60 Hz autosensing internal universal power supply Power Consumption 40 watts...

Page 9: ...a stack A stack of four 24 port hubs yields 96 Ethernet Fast Ethernet ports The Hub operates as a Class II Fast Ethernet repeater allowing it to be linked to another Class II Fast Ethernet stack in th...

Page 10: ...ng up to four hubs to form one logical hub Uplink jack for easy linking of two hubs to further expand the network Standard size 19 1U height rack mountable The total bandwidth of each stack is up to 1...

Page 11: ...or servers through these ports If you need to connect to another device with MDI X ports such as another hub or Ethernet Switch you should use a crossover cable or connect using the Uplink port descri...

Page 12: ...isychain IN Port of the next hub in the stack usually placed immediately below it using the included daisychain cable AC Power Connector For the AC power cord 3 2 Installing the Hub 3 2 1 INSTALLATION...

Page 13: ...vice The rubber feet cushion the Hub and protect the Hub case from scratches 3 2 2 RACK MOUNTING The Hub can be mounted in an EIA standard size 19 inch rack 48 3 cm which can be placed in a wiring clo...

Page 14: ...b in the stack Therefore a collision on a 10BASE T segment will not be shown on the other hubs in the stack but a collision in the 100BASE TX domain will show on each hub in the stack FX Link Reserved...

Page 15: ...ation the interconnected hubs constitute a single logical unit providing a maximum of 96 twisted pair ports Use the provided daisychain cable to connect the daisychain OUT port on the rear panel of on...

Page 16: ...remaining segments may be populated mixing segments for example 10BASE2 or 10BASE5 Fast Ethernet 100 Mbps networks have the following connectivity rules The maximum length of a twisted pair segment th...

Page 17: ...ed pair port and the Uplink port requires an ordinary straight through twisted pair cable When connecting two hubs or hub stacks in this fashion the maximum distance between any two end stations in a...

Page 18: ...r or EIA TIA 568 compliant 100 ohm shielded twisted pair Maximum segment length 100 meters 328 ft Maximum network diameter 205 meters 673 ft Connectors RJ 45 Figure 6 1 RJ 45 connectors Table 6 1 Stra...

Page 19: ...ollowing steps to create a customized crossover twisted pair cable 1 Leave one end of the cable as is with the RJ 45 connector intact The wiring at just one end of the cable needs to be modified 2 At...

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