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Table of Contents
1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 1
The StackMaster TX12 Hub . . . . . . . . . . . . . . . . . . . . . . . . . .1
StackMaster TX12 Hub Features . . . . . . . . . . . . . . . . . . . . . . . .1
Networking the StackMaster TX12 Hub . . . . . . . . . . . . . . . . . . .2
StackMaster TX12 Hub Connectors and Status LEDs . . . . . . .3
RJ-45 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
SCSI Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Power Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
2 SITE CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . 4
3 INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Unpacking 12-Port Stackable Hub . . . . . . . . . . . . . . . . . . . . .5
Installing StackMaster™ TX12 in 19-inch Rack . . . . . . . . . . .6
Optionally Cascading 12-Port Stackable Hubs . . . . . . . . . . . .7
Using Port 12 to Cascade Two Hubs . . . . . . . . . . . . . . . . . . . . .7
Using SCSI Connectors to Cascade Stacked Hubs . . . . . . . . . . .8
Connecting 100BASE-TX Cable . . . . . . . . . . . . . . . . . . . . . . .9
Connecting Power to StackMaster™ TX12 . . . . . . . . . . . . . .10
4 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . 12
Fault Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Technical Support Contact . . . . . . . . . . . . . . . . . . . . . . . . .12
WARRANTY STATEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
CABLE SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
STACKMASTER TX12 HUB SPECIFICATIONS. . . . . . . . . . . 17
StackMaster™ TX12
i
15
100BASE-TX 12-Port Stackable Hub
FAST ETHERNET (IOOBASE-X)
CABLE SPECIFICATIONS
Due to the limited collision domain in 100BASE-X, use the shortest
cables possible to make a connection between any two devices.
Where collisions are not a consideration (full duplex), longer
cable may be possible.
Effective cable distances are determined by ambient RF noise and
by signal loss in the cable. Since fiber has low signal loss/meter
and invulnerability to RF noise, fiber is the preferred medium for
extending distances.
100BASE-FX Cable and Connector Specifications
The physical characteristics of the 100BASE-FX cable must meet or
exceed IEEE 802.3 100BASE-FX specifications.
100BASE-FX CABLE SPECIFICATIONS
Fiber Optic Cable Recommended: 62.5 / 125 µm multimode fiber
Optional: 100 / 140 µm multimode fiber
85 / 125 µm multimode fiber
50 / 125 µm multimode fiber
Fiber Optic Transmitter Power:
Average power: -19.0 dBm
Fiber Optic Receiver Sensitivity:
Average sensitivity: -33.5 dBm
Bit error rate: ≤10
-10
Maximum Cable Distance: 2000 meters (6500 feet)
100BASE-FX CONNECTOR CHARACTERISTICS:
The 100BASE-FX connectors are standard ST connectors.
SC connectors are available.