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724-746-5500 | blackbox.com
Chapter 6: Operation
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Figure 6-3. Front panel of the LES424A.
Table 6-3. LEDs on the LES424A serial server.
Number in Figure
6-3 LED Indicator Description
1(1) Power LED The Power LED illuminates when 10 to 58 VDC power is ap plied to either powe r connector.
2(1) Ready LED The Ready LED (gree n) illuminates continuousl y while the unit is ini tializing. It flashes o nce per second
when the system is operating correctly. If the LED is not flashing, it indicates that something is wrong
(e.g. another device on the network at the same IP address).
3(2) Ethernet Speed LEDs
Lights green when the Ethern et connection is op erating at 100 Mbps.
Off when the connection is operating at 10 Mbps.
4(2) Ethernet Link LEDs
Lights when a connection is made.
Flashes when there is data t raffic on the Ethernet link.
5 (4) Serial Port LEDs (P1, P2, P3, and P4) Each serial port has an as sociated LED. Serial P ort LEDs flash (g reen) when data is being transmitted or
received on the serial por ts. When the LED is illuminated, it indica tes the serial por t is open.
6(1) Reset switch A recessed momentary Re set switch is locate d on the side of the enclosure. To activate th e switch,
insert a small plastic tool through the hole in the enclosure and press lightly.
NOTE: LEDs on the Hardened Serial Server are also used to indicate various Reset modes, as described in the following section.