Recommendation G.957 (06/99)
15
combined dispersion and reflection degradations, does not exceed the value given in 6.4.4 and
Tables 2 to 4 since a higher value may lead to rapidly deteriorating system performance.
T1508990-92
Maximum
launched
power
Minimum
launched
power
Receiver
overload
Receiver
sensitivity
Attenuation
minimum
Attenuation
maximum
Optical path
penalty
Figure 3/G.957 – Relationship of the optical parameters
For dispersion-limited systems, the system integrator may select an appropriate application code and
corresponding set of optical parameters by determining the total dispersion (ps/nm) expected for the
elementary cable section to be designed. The most economical design generally corresponds to the
selection of the application having the smallest maximum dispersion value exceeding the dispersion
value determined for the system design. Again, the total optical path
power penalty should be
verified as described above.
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