15-11
Cisco ONS 15454 DWDM Installation and Operations Guide, R6.0
September 2005
Chapter 15 Shelf Hardware Reference
15.4.1 FlexLayer Modules
shows the module functional block diagram. In
, the signal flows from left to
right when the card is used as a drop component and from right to left when the module is used as an
add component.
Figure 15-6
Two-Channel Add/Drop FlexLayer Module Block Diagram
When the module is used as a drop component, the wave-division multiplexing (WDM) composite signal
coming from the DROP-COM-RX port is filtered sequentially by two filters and the filtered channels are
dropped at the two DROP-CH-TX ports. The rest of the WDM composite signal is sent to the
DROP-COM-TX port. A two-percent tap coupler, DROP-MON, is used to monitor the input WDM
composite signal.
When the module is used as an add component, the added channels coming from the two ADD-CH-RX
ports are combined with the WDM composite signal coming from the ADD-COM-RX port. The
multiplexed WDM composite signal is sent to the ADD-COM-TX port. A two-percent tap coupler,
ADD-MON, is used to monitor the multiplexed WDM composite signal.
24
58.1
192.4
1558.17
15216-FLB-2-58.9=
23
58.9
192.3
1558.98
22
59.7
192.2
1559.79
15216-FLB-2-60.6=
21
60.6
192.1
1560.61
Table 15-1
ONS 15454 100-GHz Channel Plan (continued)
ITU
Channel ID
Frequency (THz)
Wavelength (nm)
Two-Channel A/D
Flex Module
90947
DROP-MON
DROP-COM-RX
ADD-COM-TX
ADD-MON
DROP-COM-TX
ADD-COM-RX
Connector
Channel Filter
ADD CH-RX
DROP CH-TX
DROP
ADD
Summary of Contents for ONS 15454 DWDM
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