Wss-C Card - Cisco ONS 15454 DWDM Reference Manual

7.10 40-WSS-C Card

7.10 40-WSS-C Card
See the
Note
For 40-WSS-C safety label information, see the
Note
section on page
The double-slot 40-channel Wavelength Selective Switch C-Band (40-WSS-C) card switches 40 ITU-T
100-GHz-spaced channels identified in the channel plan
dedicated output ports. The 40-WSS-C card is bidirectional and optically passive. The card can be
installed in Slots 1 to 6 and 12 to 17
The 40-WSS-C features include:
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Within the 40-WSS-C card, the first AWG opens the spectrum and each wavelength is directed to one of
the ports of a 1x2 optical switch. The same wavelength can be passed through or stopped. If the
pass-through wavelength is stopped, a new channel can be added at the ADD port. The card's second
AWG multiplexes all of the wavelengths, and the aggregate signal is output through the COM-TX port.
7.10.1 40-WSS-C Faceplate Ports
The 40-WSS-C has eight types of ports:
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Cisco ONS 15454 DWDM Reference Manual, R8.5
7-50
"A.7.8 40-WSS-C Card Specifications" section on page A-31
7-9.
Receipt of an aggregate DWDM signal into 40 output optical channels from the Line receive port
(EXP RX) in one direction and from the COM-RX port in the other direction.
Per-channel optical power monitoring using photodiodes.
Signal splitting in a 70%-to-30% ratio, sent to the 40-DMX-C for dropping signals, then to the other
40-WSS-C card.
Aggregate DWDM signal monitoring and control through a variable optical attenuator (VOA). In
the case of electrical power failure, the VOA is set to its maximum attenuation for safety purposes.
A manual VOA setting is also available.
ADD RX ports (1 to 40): These ports are used for adding channels. Each add channel is associated
with an individual switch element that selects whether an individual channel is added. Each add port
has optical power regulation provided by a VOA. The five connectors on the card faceplate accept
MPO cables for the client input interfaces. MPO cables break out into eight separate cables. The
40-WSS-C card also has one LC-PC-II optical connector for the main input.
COM RX: The COM RX port receives the optical signal from a preamplifier (such as the OPT-PRE)
and sends it to the optical splitter.
COM TX: The COM TX port sends an aggregate optical signal to a booster amplifier card (for
example, the OPT-BST card) for transmission outside of the NE.
EXP RX port: The EXP RX port receives an optical signal from another 40-WSS-C card in the same
NE.
EXP TX: The EXP TX port sends an optical signal to the other 40-WSS-C card within the NE.
DROP TX port: The DROP TX port sends the split off optical signal that contains drop channels to
the 40-DMX-C card, where the channels are further processed and dropped.
Chapter 7 Reconfigurable Optical Add/Drop Cards
for hardware specifications.
"7.2 Safety Labels for Class 1M Laser Product Cards"
(Table 7-21 on page 7-38) and sends them to
78-18343-02