4
Cisco CWDM Passive Optical System Installation Note
78-16565-02
Overview
Figure 2 4-Channel OADM (CWDM-OADM4-1) Front Panel
Figure 3 4-Channel OADM (CWDM-OADM4-2) Front Panel
Dual Single-Channel OADMs (CWDM-OADM1-xxxx)
The Dual Single-Channel OADMs (CWDM-OADM1-xxxx) allows you to add/drop two channels of the
same wavelength into the two directions of an optical ring. The other wavelengths are passed through
the OADM. The dual single-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 CWDM GBIC and CWDM SFP
connections. Eight versions of this OADM are available, one for each wavelength of light. (See Table 2.)
The dual single-channel OADMs, shown in Figures 4 through 11, are color coded and match the color
coding of the CWDM GBIC and CWDM SFP transceivers. The dual single-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.
Table 3 provides a comparison of the CWDM passive device types.
113998
TX
RX
RX
TX
CWDM-
OADM4-1
INVISIBLE LASER
DO NOT VIEW
MONITOR
NETWORK
TX
RX
RX
TX
MONITOR
PASS
TX
RX
RX
TX
1490
1470
TX
RX
RX
TX
1530
1510
113999
TX
RX
RX
TX
CWDM-
OADM4-2
INVISIBLE LASER
DO NOT VIEW
MONITOR
NETWORK
TX
RX
RX
TX
MONITOR
PASS
TX
RX
RX
TX
1570
1550
TX
RX
RX
TX
1610
1590
Table 2 Dual Single-Channel OADMs
Product Number Description
Connector Color
Code
CWDM-OADM1-1470= Dual single-channel OADM (1470 nm) Gray
CWDM-OADM1-1490= Dual single-channel OADM (1490 nm) Violet
CWDM-OADM1-1510= Dual single-channel OADM (1510 nm) Blue
CWDM-OADM1-1530= Dual single-channel OADM (1530 nm) Green
CWDM-OADM1-1550= Dual single-channel OADM (1550 nm) Yellow
CWDM-OADM1-1570= Dual single-channel OADM (1570 nm) Orange
CWDM-OADM1-1590= Dual single-channel OADM (1590 nm) Red
CWDM-OADM1-1610= Dual single-channel OADM (1610 nm) Brown
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