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Cisco ONS 15454 DWDM Engineering and Planning Guide, Release 7.x
July 2006
Chapter2 Cards Specifications 2.2.4 Optical Amplifiers
•Full monitoring and alarm handling capability with settable thresholds
•Supported optical safety functionality by signal loss detection and alarm, fast power downcontrol,
and reduced maximum output power in safe power mode
The OPT-BST-L card implements the following optical safety functions:
•Optical Safety Remote Interlock (OSRI)
•Automatic Laser Shutdown (ALS)
The OSRI function provides hardware and software capability for shutting downor reducing the output
optical power to a safer level,whereas the ALS function provides a safety mechanism (automatic power
reduction [APR]) for fiber cuts.
Table2-25 defines all power and gain specifications for OPT-BST-L card:
Figure 2-8 shows the standard and extended gain range for the OPT-BST-L card. Red lines indicate the
total measurement range accomplished by the photodiodes.
Figure 2-8 OPT-BST-L Card Standard and Extended Gain Range
Table2-25 OPT-BST-L Card Power and Gain Specifications
Parameter Comment Min Typical Max Unit
Operative input powerrange Full channel load –10 — 9 dBm
Single channel –37 — –18 dBm
Maximum total output
power FW or HW limited — — 17.5 dBm
Signal output power range Full channel load — — 17 dBm
Single channel –10 — dBm
Standard gain range Controllable gain tilt 8 — 20 dB
Extended gain range Gain tilt uncontrolled 20 — 27 dB