3
Cisco CWDM Passive Optical System Installation Note
78-16565-02
Overview
CWDM OADMs
The CWDM OADMs are passive devices that can multiplex/demultiplex or add/drop wavelengths from
multiple fibers onto one optical fiber. The OADM connectors are interfaced to the color-matching
CWDM GBIC or CWDM SFP transceivers on the equipment side. All OADMs are the same size. Two
OADM modules can be installed in a CWDM 2-slot chassis (CWDM-CHASSIS-2). There are three
different types of CWDM OADM modules
8-Channel Multiplexer/Demultiplexer (CWDM-MUX-8A=)
The 8-Channel Multiplexer/Demultiplexer (CWDM-MUX-8A=) allows you to multiplex/demultiplex
eight separate channels into one pair of fiber. Dual fiber is used for both the network connection and the
CWDM GBIC or CWDM SFP transceiver connections. The eight available wavelengths are 1470-nm,
1490-nm, 1510-nm, 1530-nm, 1550-nm, 1570-nm, 1590-nm, and 1610-nm. The
multiplexer/demultiplexer, shown in Figure 1, is equipped with a monitor port that allows you to attach
a power meter or an optical spectrum analyzer to assist you in monitoring and troubleshooting the
network.
Figure 1 8-Channel Multiplexer/Demultiplexer (CWDM-MUX8) Front Panel
4-Channel OADM (CWDM-OADM4-1= and CWDM-OADM4-2=)
The 4-Channel OADM (CWDM-OADM4-1= and CWDM-OADM4-2=) allows you to add/drop four
channels (with different wavelengths) into one direction of an optical ring. The other wavelengths are
passed through the OADM. The 4-channel OADMs are transparent to the 1300-nm wavelength and
includes a 1300-nm/1500-nm filter to mix legacy SONET/SDH/ATM ring installations with CWDM
installations on the same optical fiber. Dual fiber is used for both the network and the GBIC or SFP
connections. The two 4-channel OADMs, shown in Figure 2 and Figure 3, support the following
wavelengths:
• CWDM-OADM4-1—1470-nm, 1490-nm, 1510-nm, and 1530-nm.
• CWDM-OADM4-2—1550-nm, 1570-nm, 1590-nm, and 1610-nm.
The 4-channel OADM modules are equipped with a monitor port that allows you to attach a power meter
or an optical spectrum analyzer to assist you in monitoring and troubleshooting the network.
114000
TX
RX
RX
TX
CWDM-
MUX-8A
INVISIBLE LASER
DO NOT VIEW
MONITOR
NETWORK
TX
RX
RX
TX
1530
1510
TX
RX
RX
TX
1490
1470
TX
RX
RX
TX
1570
1550
TX
RX
RX
TX
1610
1590
To Next Page
Loading...
Need help?
General
