GarrettCom Magnum ST80 Manual De Usuario

Stackable Personal Hubs 

 Installation and User Guide   (04/01)

 
 

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ST80 Personal Hubs fit easily into the workplace environment. They are 

versatile enough to be table-top or shelf-mounted. Alternatively, the brackets included in 

the package may be used to mount a single (un-stacked) unit on a wall or any suitable 

vertical surface. All of the wiring connectors are in the same plane so that wiring space is 

neat and minimal. The external power supply unit conveniently plugs into an AC wall 

receptacle or power strip. 

 

 

 

The ST80's RJ-45 ports support connection of up to eight workstations or other 

network devices over full length 10BASE-T cable segments.  Stackable Personal Hubs 

operate in compliance with the IEEE 802.3 specification for repeater functionality to 

perform signal amplification, re-timing of data packets, and regeneration of preamble bits 

for each packet received.  Consistent with IEEE 802.3 specifications, Stackable Personal 

Hubs will detect collisions, extend collision fragments, and automatically partition and 

re-connect individual ports in order to keep problems on one segment from causing 

downtime elsewhere on the network. 

Model ST80 Personal Hubs include per port LINK/TX and POL/RX LEDs, a 

COLlision LED and a DC PWR LED, all conveniently located on the front of the unit.  

The LINK/TX LED illuminates GREEN when functional link is detected on the port.  It 

is intermittently turned off as the port transmits a packet.  The POL/RX LED 

intermittently illuminates GREEN as the port receives packets.  If improper polarity is 

detected, the LED is steady GREEN (the ST80 automatically compensates for the 

polarity reversal and resumes normal operation).  If the port becomes partitioned, the 

LINK/RX and POL/TX LEDs will blink alternately.  The COL LED flashes YELLOW 

whenever a transmit collision occurs on any of the ports.