Specifications
4-75
Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 4 Card Reference
OC48 LR 1550 Card
4.24.1 OC48 LR 1550 Card-Level Indicators
The OC48 LR 1550 card has three card-level LED indicators.
4.24.2 OC48 LR 1550 Port-Level Indicators
You can find the status of the OC48 LR 1550 card port using the LCD screen on the ONS 15454 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. See Chapter 1, “Alarm Troubleshooting” for a complete
description of the alarm messages.
Warning
Invisible laser radiation may be emitted from the end of the unterminated fiber cable or connector.
Do not stare into the beam or view directly with optical instruments. Viewing the laser output with
certain optical instruments (for example, eye loupes, magnifiers, and microscopes) within a
distance of 100 mm may pose an eye hazard. Use of controls or adjustments or performance of
procedures other than those specified may result in hazardous radiation exposure.
4.24.3 OC48 LR 1550 Card Specifications
• Line
–
Bit Rate: 2.49 Gbps
–
Code: Scrambled NRZ
–
Fiber: 1550 nm single-mode
–
Loopback Modes: Terminal and Facility
–
Connectors: SC
–
Compliance: Telcordia SONET, GR-GSY-00253
• Transmitter
–
Max. Transmitter Output Power: +3 dBm
–
Min. Transmitter Output Power: -2 dBm
–
Center Wavelength: 1520 nm – 1580 nm
–
Nominal Wavelength: 1550 nm
Table 4-35 OC48 LR 1550 Card-Level Indicators
Card-Level Indicators Description
Red FAIL LED
The red FAIL LED indicates that the card’s processor is not ready. Replace
the card if the red FAIL LED persists.
Green ACT LED
The green ACT LED indicates that the OC48 LR 1550 card is carrying traffic
or is traffic-ready.
Amber SF LED
The amber SF LED indicates a signal failure or condition such as LOS, LOF
or high BERs on the card’s port. The amber SF LED also illuminates when
the transmit and receive fibers are incorrectly connected. When the fibers are
properly connected, the light turns off.