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Cisco ONS 15501 User Guide
78-14134-02, Release 2.0
Chapter 1 Product Overview
Optical Specifications
Optical Specifications
Table 1-1 lists the Cisco ONS 15501 optical specifications and Table 1-2 lists the Alarms thresholds. For
other technical specifications, see Appendix B, “Technical Specifications.”
Table 1-1 Cisco ONS 15501 Optical Specifications
Description Specification
Wavelength range 1530 to 1563 nm
Input power range -29 to 0 dBm
Saturated output power 17.3 ± 0.3 dBm
Noise figure < 6.0 dB
Nominal gain +17 dB
Gain flatness < 1.5 dB
Settable variable gain 17 dB to 7 dB
1
1. Gain flatness is <1.5 dB for 17-13 dB; <2.0 dB for 7-13 dB.
Automatic gain control accuracy ± 1.0 dB
Transient suppression response time 50 microseconds
Backward ASE (amplified spontaneous emission) power < -25 dBm
PMD (polarization mode dispersion) < 0.6 ps
Mode of operation Unidirectional
Optical return loss > 27 dB
Input and output isolation > 30 dB
Polarization sensitivity < 0.5 dB
Table 1-2 Alarm Thresholds
Minimum Value
Programmable
Factory
Default
Max Value
Programmable
Optical In Mean -10 -10 0
Optical In Trig 0 20 20
Signal Mean -6 0 0
Signal Trig 0 17.5 18
Gain Mean
1
1. Gain Mean is the only settable parameter that effects system performance.
717.517.5
Gain Trig 0 1 2
Temp Mean 20 30 40
Temp Trig 20 25 30