CWDM SFP transceivers are color coded to indicate their designated optical wavelength. Figure 150: CWDM
SFP Transceiver (Yellow Color Code), on page 225 shows the CWDM transceiver, which looks like a standard
1000BASE-X SFP transceiver with a colored arrow and bail clasp to indicate the designated wavelength.
Whenever the transceiver receive optical bores are not filled with optical cables, you should minimize the
chance of contamination by plugging the transceiver with its dust plug.
Note
Figure 150: CWDM SFP Transceiver (Yellow Color Code)
Bail clasp4Colored arrow on label specifies the wavelength1
Dust plug5Receive optical bore2
Transmit optical bore3
For the specifications that differentiate the 1000BASE-CWDM SFP transceivers, see the Cisco Gigabit Ethernet
Transceiver Modules Compatibility Matrix. For specifications and installation information that apply to all
CWDM SFP transceivers, see the Cisco SFP and SFP+ Transceiver Module Installation Notes.
1000BASE-DWDM SFP Transceivers
The Dense Wavelength Division Multiplexing (DWDM) SFP transceivers are part of a DWDM optical network
to provide high-capacity bandwidth across a fiber-optic network. There are 40 fixed-wavelength DWDM SFP
transceivers that support the International Telecommunications Union (ITU) 100-GHz wavelength grid. These
transceivers have duplex SC connectors. DWDM SFP transceivers can transmit and receive optical signals
up to 50 miles (80 km) depending on the quality of the fiber-optic cable used.
DWDM SFP transceivers look like the typical 1000BASE-X transceivers as shown in Figure 152: 1000BASE-X
SFP Transceiver, on page 226.
For the specifications that differentiate the 1000BASE-DWDM SFP transceivers, see the Cisco Gigabit
Ethernet Transceiver Modules Compatibility Matrix. For specifications and installation information that apply
to all CWDM SFP transceivers, see the Cisco SFP and SFP+ Transceiver Module Installation Notes.
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
225
Transceivers and Module Connectors
1000BASE-DWDM SFP Transceivers
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