3-58
Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
Chapter 3 Card Reference
OC48 LR/STM16 LH AS 1550 Card
Figure 3-38 OC48 LR/STM16 LH AS 1550 Block Diagram
Warning
Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into
beams or view directly with optical instruments.
3.23.3 OC48 LR/STM16 LH AS 1550 Card Specifications
• Line
–
Bit Rate: 2488.320 MBits/s (Mbps)
–
Code: Scrambled NRZ
–
Fiber: 1550 nm Single Mode
–
Loopback Modes: Terminal and Facility
–
Connectors: SC
–
Compliance: ITU-T G.707, ITU-T G.957
• Transmitter
• Maximum Transmitter Output Power: +3 dBm
• Minimum Transmitter Output Power: -2 dBm
• Center Wavelength: 1520 nm – 1580 nm
• Nominal Wavelength: 1550 nm
• Transmitter: Distributed Feedback (DFB) Laser
• Receiver
–
Maximum Receiver Level: -8 dBm at BER 1 * 10
-10
–
Minimum Receiver Level: -28 dBm at BER 1 * 10
-10
–
Receiver: InGaAs APD photo detector
–
Link Loss Budget: 26 dB minimum, with 1 dB dispersion penalty
uP bus
uP
Flash
RAM
BTC
ASIC
Optical
Transceiver
STM-16
Main SCI
Protect SCI
STM-16
63119
Mux/
Demux
B
a
c
k
p
l
a
n
e
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