3Com CoreBuilder 7000, Installation & Start?Up Manual, Page: 52 / 150

52 C
HAPTER
5: P
OWER
-O
N
Figure 10
Interface Module LEDs
DS-3 Status LEDs
The DS-3 status LEDs are found on the front panel of the DS-3 piggy.
Table 13 lists the LEDs of the DS-3 piggy.
Table 11
Description of Interface Module LEDs
LED Color Description Source
PWR (Power) Green DC power input active. Hardware
FAIL Red CPU failure. Hardware
CPU or
Watchdog
ACT (Activity) Yellow Should blink continuously when
operational. Software
Table 12
Description of Interface Module LEDs for Each Port
LED Color Description Source
LINK STATUS Green ATM physical layer is connected and
has no error. Software
FAIL Red ATM interface port test failure. Software
ACT (Activity) Yellow Reception and transmission of cells on
ATM link – should flash to indicate
traffic. Software