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Cisco ONS 15454 DWDM Engineering and Planning Guide, Release 7.x
July 2006
Chapter 2 Cards Specifications
2.2.5 Dispersion Compensation Units
2.2.5.1 DCU Mechanical Specifications
The DCU subrack is designed to comply with all international standards. The DCU shelf is housed in a
1-RU 19" (482.6mm)/23” (584.2mm) rack-mounted shelf [17" (431.8mm) wide, 11" (279.4mm) deep,
1.75" (44.45mm) high] with all front access (fibers, management interfaces when applicable). The depth
of the subrack, including cable management, does not exceed the 280 mm requirement.
For a bidirectionalDCU, shown in Figure 2-12, thedimensions are 8” (205mm) wide, 9” (230 mm) deep,
and 1.5” (38.5 mm) high.
The DCU has one optical adapter on its front panel that can house two LC-PC-II connectors.
Figure 2-12 DCU Front Panel
Refer to the Cisco ONS 15216 System Dispersion Compensation Unit User Guide for the
Cisco ONS 15216 DCU mechanical specifications.
2.2.5.2 DCU Optical Specifications
Table 2-28 shows the optical specifications for ONS 15454 DCUs.
DCU West DCU East
151600
Table 2-28 Optical Specifications for ONS 15454 DCUs
Units Specifications
Notes
C Band L Band
Insertion
Loss [dB]
PMD
[ps/nm] PDL [dB] ORL [dB]
15216-DCU-100= — <2.1 0.3 <0.1 <45 Wavelength range
1525 to 1565n
15216-DCU-350= — <3.5 0.55
15216-DCU-450= — <3.5 0.65
15216-DCU-550= — <3.9 0.7
15216-DCU-750= — <5 0.8
15216-DCU-950= — <5.5 0.9
15216-DCU-1150= — <6 1
15216-DCU-E-200= — <5.5 0.9 <0.1 <45 Wavelength range
1529.5 to 1561.6 nm
15216-DCU-E-350= — <7.0 1