GarrettCom Magnum ST80 manual Irb, Connectors Stack Enable Switch

Stackable Personal Hubs Installation and User Guide (04/01)

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.

10BASE2 (BNC) Port (ST80-B only) Fiber (ST) PORT (ST80-F only)

BNC Internal

Termination Swtich

(ST80-B only) Power Jack

AUI Port

IRB

Connectors

Stack Enable

Switch

B			PWR	AUI
I
R
1I		Magnum ST80 Stackable Personal Hub
a
R
B
2
St	E			UP-LINK
OFF
ck
	nabl	Ports 1 2	3 4 5 6	7 8
	O e
	N
	Status LEDs		Front Ports

Up-Link Switch

Switchable

Up-Link Port

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.

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