Specifications

4-84
Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 4 Card Reference
OC48 ELR/STM16 EH 100 GHz Cards
You can install the OC48 ELR/STM16 EH 100 GHz cards in any high-speed slot and provision the card
as a drop or span card in a two-fiber or four-fiber BLSR, UPSR, or in an ADM (linear) configuration.
Each OC48 ELR/STM16 EH 100 GHz card uses extended long reach optics operating individually
within the ITU-T 100 GHz grid. The OC-48 DWDM cards are intended to be used in applications with
long unregenerated spans of up to 200 km (with mid-span amplification). These transmission distances
are achieved through the use of inexpensive optical amplifiers (flat gain amplifiers) such as Cisco ONS
15216 erbium-doped fiber amplifiers (EDFAs).
Maximum system reach in filterless applications is 26 dB 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. When used in combination with ONS 15216
100 GHz filters, the link budget is reduced by the insertion loss of the filters plus an additional 2dB
power penalty. The OC-48 ELR DWDM cards wavelength stability is +/- 0.12 nm for the life of the
product and over the full range of operating temperatures. Each interface contains a transmitter and
receiver.
The OC-48 ELR cards detect loss of signal (LOS), loss of frame (LOF), loss of pointer (LOP), and
line-layer alarm indication signal (AIS-L) conditions. See Chapter 1, “Alarm Troubleshooting” for a
description of these conditions. The cards also count section and line BIT errors.
4.27.1 OC48 ELR 100 GHz Card-Level Indicators
The OC48 ELR/STM16 EH 100 GHz cards have three card-level LED indicators.
4.27.2 OC48 ELR 100 GHz Port-Level Indicators
You can find the status of the OC48 ELR card ports using the LCD screen on the ONS 15454 fan-tray
assembly. Use the LCD to quickly 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.
Ta b l e 4 - 3 8 OC48 ELR/STM16 EH 100 GHz 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 ELR 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.