The REX Unit
The REX unit provides USB Type A ports for standard USB devices and allows you to connect up to four USB
devices directly. Additional devices may be connected by attaching up to four USB hubs to the REX unit. The
REX is powered by an external AC adapter, supplying up to 1 Amp per USB port when two or less are in use
or 2.5 Amps shared across all four ports.
ITEM TYPE
DESCRIPTION
1
Device Ports
(USB Type-A)
Accepts USB devices.
2
Power LED (Blue)
LED turns on when power is supplied.
3
Link LED (Green)
Indicates a valid ExtremeUSB link is established between the LEX and REX.
LED turns on when link between the LEX and REX units is established.
LED is off when there is no link between the LEX and REX units.
LED is slow blinking when the unit is attempting to establish a link.
4
Host LED (Green)
Indicates that the extender system is properly enumerated on the host
computer. LED blinks when the extender system is in a suspended state.
5
Activity LED (Green)
Indicates data transmission is occurring between the LEX and REX units.
LED blinks intermittently with or without a USB device connected.
When the LEX and REX units are in suspend mode, the LED is off.
6
DC Power Port
Connects to the AC power supply. Required for proper operation.
7
Config
Reserved for manufacturer use.
8
Mode
Reserved for manufacturer use.
9
Link Port (Duplex LC)
Extension link Duplex LC fiber optic transceiver port.
5
Front View
Rear View
2
3
4
5
1
1
1
1
7
8
9
6
Config
Mode
Link
24V 1A
