Nortel Meridian Companion Installation And Maintenance Manual page 71

Figure 20 : Card LED locations
CMCC
card status LED
SP
system LED
J2
When the card is first installed or powered up, the LED goes on for
approximately 3 seconds, then flashes three times to indicate that the firmware
self-test sequence is operating properly. If the LED does not follow this
pattern, the card is defective and must be replaced.
The system LED is the bottom LED on the CMCC. It indicates the status of
the Controller software. Its state affects the state of all other cards. When the
CMCC is first installed, the system LED does the following:
• Does not flash but remains on for approximately 5 seconds.
• Goes off for approximately 5 seconds.
• Begins flashing to indicate that connected cards and TCM devices are
initializing.
If this normal pattern (on/off/flashing) does not occur, refer to "Normal card
LED behavior" on page 166. LED behavior following initialization depends
on whether the CMCC has been programmed and whether expansion cards
have been connected, as described in Table 39: Card LED behavior, on
page 167.
Installing the hardware Page 61 of 206
CMRC/CMLC/CMBC
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Meridian Companion Installation and Maintenance Guide