IMC Networks 20 - Manual (Page 7)

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The SNMP Management Module can be removed and replaced as necessary. Refer
to the SNMP Management Module manual for complete instructions about how to
configure and operate. If an SNMP Management Module is installed, refer to the
LED panel below for indicators of Link, Temperature, Power supply modules and
other functions.
SNMP Management Module LEDs
The SNMP Management Module features several LEDs. The LED functions are:
LNK/ACT
FDX/COL
TEMP
PS
FAN A / FAN B
Glows green when a link is established on port.
Blinks green when data activity occurs.
Glows yellow when port is in Full-Duplex mode.
Blinks yellow when port is operating in Half-
Duplex mode and collisions occur.
Glows yellow when temperature of unit surpasses a
user-defined level.
Glows yellow when one module malfunctions.
Glows yellow when a fan malfunctions.