Datasheet

4-22
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 4 Optical Cards
4.10.2 OC48 ELR/STM16 EH 100 GHz Card-Level Indicators
transmission distances are achieved through the use of inexpensive optical amplifiers (flat gain
amplifiers) such as erbium-doped fiber amplifiers (EDFAs). Using collocated amplification, distances
up to 200 km can be achieved for a single channel (160 km for 8 channels).
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 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 the Cisco ONS 15454 SDH Troubleshooting Guide for a description of these conditions. The
cards also count section and line BIP errors.
To enable an MS-SPRing, the OC48 ELR/STM16 EH 100 GHz cards extract the K1 and K2 bytes from
the SDH overhead. The GCC bytes are forwarded to the TCC2/TCC2P card; the TCC2/TCC2P
terminates the GCC.
4.10.2 OC48 ELR/STM16 EH 100 GHz Card-Level Indicators
Table 4-11 describes the three card-level LED indicators on the OC48 ELR/STM16 EH 100 GHz cards.
4.10.3 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 the Cisco ONS 15454 SDH
Troubleshooting Guide for a complete description of the alarm messages.
Table 4-11 OC48 ELR Card-Level Indicators
Card-Level LED Description
Red FAIL LED The red FAIL LED indicates that the card processor is not ready. The FAIL
LED is on during reset and flashes during the boot process. Replace the card
if the red FAIL LED persists.
Green/Amber ACT LED The green ACT LED indicates that the card is carrying traffic or is
traffic-ready. The amber ACT LED indicates that the card is in standby mode
or is part of an active ring switch (MS-SPRing).
Amber SF LED The amber SF LED indicates a signal failure or condition such as LOS, LOF,
or high BERs on one or more card ports. The amber SF LED is also on if the
transmit and receive fibers are incorrectly connected. If the fibers are
properly connected and the link is working, the light turns off.