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Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 3 Electrical Cards
3.6.2 STM1E-12 Card-Level Indicators
Note When a protection switch moves traffic from the STM1E-12 working/active card to the STM1E-12
protect/standby card, ports on the now active/standby card cannot be taken out of service. Lost traffic
can result if you take a port out of service, even if the STM1E-12 active/standby card no longer carries
traffic.
Note Use an external clock when doing service disruption time measurements on the STM1E-12.
3.6.2 STM1E-12 Card-Level Indicators
Table 3-7 describes the three LEDs on the STM1E-12 card faceplate.
3.6.3 STM1E-12 Port-Level Indicators
You can find the status of the 12 STM1E-12 card ports using the LCD screen on the ONS 15454 SDH
fan-tray assembly. Use the LCD to view the status of any port or card slot; the screen displays the number
and severity of alarms for a given port or slot. Refer to the Cisco ONS 15454 SDH Troubleshooting
Guide for a complete description of the alarm messages.
3.7 BLANK Card
The BLANK card provides EMC emission control for empty interface card slots. It also provides a way
to close off the subrack front area, thus allowing air flow and convection to be maintained through the
subrack. Figure 3-6 shows the BLANK card faceplate.
Caution You must install the BLANK card in every empty interface card slot to maintain EMC requirements of
the system and proper air flow.
Table 3-7 STM1E-12 Card-Level Indicators
Card-Level LEDs Description
Red FAIL LED Indicates that the card’s processor is not ready. The FAIL LED is on during
reset and flashes during the boot process. Replace the card if the FAIL LED
persists in flashing.
ACT/STBY LED
Green (Active)
Amber (Standby)
When the ACT/STBY LED is green, the STM1E-12 card is operational and
ready to carry traffic. When the ACT/STBY LED is amber, the STM1E-12
card is operational and in Standby (protect) mode.
Amber SF LED Indicates a signal failure or condition such as port LOS.