Cisco ONS 15454 SDH Specifications Page 181

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3-61
Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
Chapter 3 Card Reference
OC48 ELR/STM16 EH 100 GHz Cards
Maximum system reach in filterless applications is 24 dB or approximately 80 km without the use of
optical amplifiers or regenerators. However, system reach also depends on the condition of the facilities,
number of splices and connectors, and other performance-affecting factors. The OC48 ELR/STM16 EH
100 GHz cards feature wavelength stability of +
0.25 nm. Each port contains a transmitter and a receiver.
The OC48 ELR/STM16 EH 100 GHz cards are the first in a family of cards meant to support extended
long reach applications in conjunction with optical amplification. Using Distributed Feedback (DFB)
Laser technology, the OC48 ELR/STM16 EH 100 GHz cards provide a solution at the lower-extended
long reach distances.
The OC48 ELR/STM16 EH 100 GHz port features a 1550 nm range laser and contains a transmit and
receive connector (labeled) on the card faceplate. The card uses SC connectors and supports 1+1
unidirectional and bidirectional protection switching.
The OC48 ELR/STM16 EH 100 GHz cards detect LOS, LOF, LOP, MS-AIS, and MS-FERF conditions.
Refer to Chapter 1, “Alarm Troubleshooting,” for a description of these conditions. The cards also count
section and line BIT errors.
To enable MSP, the OC48 ELR/STM16 EH 100 GHz cards extract the K1 and K2 bytes from the SDH
overhead. The DCC bytes are forwarded to the TCC-I card; the TCC-I terminates the DCC.
3.24.1 OC48 ELR/STM16 EH 100 GHz Card-Level Indicators
The OC48 ELR/STM16 EH 100 GHz cards have three card-level LED indicators.
3.24.2 OC48 ELR/STM16 EH 100 GHz Port-Level Indicators
You can find the status of the OC48 ELR/STM16 EH 100 GHz 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 Chapter 1, “Alarm
Troubleshooting,” for a complete description of the alarm messages.
Table 3-17 OC48 ELR Card-Level Indicators
Card-Level LEDs Description
Red FAIL LED The red FAIL LED indicates the card’s processor is not ready. This LED is
lit during Reset. The FAIL LED flashes during the boot process. Replace the
card if the red FAIL LED persists.
Green ACT LED The green ACT LED indicates that the OC48 ELR/STM16 EH 100 GHz card
is carrying traffic or is traffic-ready.
Yellow SF LED The yellow SF LED indicates a signal failure or condition such as LOS, LOF
or high BERs on one or more of the card’s ports. The Yellow SF LED also
illuminates when the transmit and receive fibers are incorrectly connected.
When the fibers are properly connected and the link is working, the light
turns off.
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