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Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 3 Electrical Cards
3.4.2 E3-12 Card-Level Indicators
3.4.2 E3-12 Card-Level Indicators
Table 3-5 describes the three LEDs on the E3-12 card faceplate.
3.4.3 E3-12 Port-Level Indicators
You can find the status of the twelve E3-12 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.
3.5 DS3i-N-12 Card
The 12-port ONS 15454 SDH DS3i-N-12 card provides 12 ITU-T G.703, ITU-T G.704, and
Telcordia GR-499-CORE compliant DS-3 ports per card. Each port operates at 44.736 Mbps over a
75-ohm coaxial cable (with the FMEC-E3/DS3 card). The DS3i-N-12 can operate as the protect card in
a 1:N (N <= 4) DS-3 protection group. It has circuitry that allows it to protect up to four working
DS3i-N-12 cards. In a 1:N protection group the DS3i-N-12 card must reside in either the Slot 3 or 15.
Figure 3-4 shows the DS3i-N-12 faceplate and block diagram.
Table 3-5 E3-12 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 E3-12 card is operational and ready
to carry traffic. When the ACT/STBY LED is amber, the E3-12 card is
operational and in Standby (protect) mode.
Amber SF LED Indicates a signal failure or condition such as port LOS.