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Cisco ONS 15454 DWDM Engineering and Planning Guide, Release 7.x
July 2006
Chapter2 Cards Specifications 2.2.3 Optical Add and Drop Cards
2.2.3.9 MMU Card
The MMU is a single-slot bidirectional card that operates over both the C-band and L-band optical
spectrums. The MMU has six LC-PC-II optical connectors on its front panel. Table 2-20 shows the
MMU specifications.
Table2-19 AD-4C-xx.x Card Optical Parameters
Optical Parameters Value
Maximum insertion loss drop section 5.4 dB
Maximum insertion loss add section 4.9 dB at VOA min attenuation
Maximum insertion loss express section
(Exp RX – COM TX) 1.2dB
Maximum insertion loss express section
(COM RX – Exp TX) 2.5dB at VOA min attenuation
Adjacent crosstalk 25 dB
Nonadjacent crosstalk 38 dB
Isolation (COM RX – Exp TX) –26 dB
Isolation (Exp RX – COM TX) –13 dB
VOA dynamic range 30 dB
Table2-20 MMU Card Optical Specifications
Parameter Condition Notes Min Typical Max Unit
Operating
bandwidth All paths All SOP,
including
WDL and
withinwhole
operating
temperature
range,
connectors
included
1500 – 1605 — — nm
Insertion
loss EXP RX => COM TX — — 7.0 dB
EXP A RX =>
COM TX — — 2.3
COM RX => EXP TX — — 0.8
COM RX =>
EXPA TX — — 14.8
Wavelength
dependent
losses
C band only — — 0.3 dB
L band only — — 0.3
C + L band — — 0.5
PDL C band only — — — 0.2 dB
L band only — — — 0.2
C + L band — — — 0.3
Chromatic
dispersion All paths — –20 — +20 ps/nm
PMD All paths — — — 0.1 ps