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Hardware Reference 17
C613-03022-00 REV K
LEDs and What They Mean
The following LEDs report operations and faults on NSMs and related
hardware:
The AT-AR040 NSM has no independent LEDs. See Table 5 for information
about related LEDs found on the base switch or router.
Switch and Router LEDs for NSMs
The following LEDs on switches and routers with NSM bays report operations
and faults on installed NSMs.
LEDs on the... Are described in ...
Switch and router base unit Table 5
AT-AR041 NSM Table 2 on page 9
AT-AR042 NSM Table 2 on page 9
AT-AR048 NSM Table 4 on page 14
AT-AR020 PRI E1/T1 PIC Table 6 on page 18
AT-AR021(S) BRI-S/T PIC Table 7 on page 18
AT-AR022 ETH PIC Table 8 on page 18
AT-AR023 SYN PIC Table 9 on page 19
AT-AR026 4ETH PIC Table 10 on page 19
AT-AR027 VoIP-FXS PIC Table 11 on page 19
Table 5: Switch and Router LEDs for NSMs
LED State Function
In use Green An NSM is installed, is receiving power, and is operational.
The NSM and its PICs are not ready for hot swap.
Off No NSM is installed, or the NSM is not installed correctly
(the switch or router has not recognised the NSM).
Swap Green The NSM and its PICs are ready to be hot swapped.
Off The Hot Swap button must be pressed before the NSM or
its PICs can be hot swapped, or the software release does
not support hot swapping. Hot swapping is supported by
software version 2.3.1 or later.