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CiscoXR 12000 Series Router Ethernet Line Card Installation
OL-7861-01
Cabling and Specifications
Using CWDM GBICs with the 3-Port Gigabit Ethernet Line Card
The 3-Port Gigabit Ethernet line card supports CWDM GBICs. The eight CWDM GBICs available for
use with an Ethernet line card are active components that plug into standard GBIC receptacles in the line
card. They convert Gigabit Ethernet electrical signals into an optical single-mode fiber (SMF) interface
that feeds into a CWDM network through a Cisco optical add/drop multiplexing (OADM) plug-in
module or multiplexing/demultiplexing (mux/demux) plug-in module. Figure34 shows the physical
appearance of a CWDM GBIC with one optical port dust plug removed.
Figure34 CWDM GBIC (Yellow-Coded CWDM-GBIC-1550= Shown)
The eight CWDM GBICs available for use with a Gigabit Ethernet line card come in eight wavelengths
in a range from 1470 nm to 1610 nm. The color dot between the receive and transmit ports and the color
band on the label of the Cisco CWDM GBIC identify the wavelength of the GBIC. Tab le 12 lists the
CWDM GBICs and their associated color codes.
2. dBm = decibels referenced to 1 milliwatt.
3. Dispersion-shifted single-mode fiber-optic cable required for 100-km distance.
4. This distance represents best case conditions, depending on fiber quality, dispersion, and losses due to connectors, nodes, or
splices. In the case of the CWDM GBICs, CWDM OADM modules or mux/demux modules are needed for these GBICs to
work in any topology other than a point-to-point topology within one building, so the maximum distance is determined by an
optical power budget calculation that takes into consideration all sources of loss, including the insertion loss due to the
CWDM OADM and mux/demux modules, and might be different from the distance shown in the table. For optical parameter
information associated with the CWDM OADM and mux/demux modules, see the “Related CWDM Documentation” section
on page47.
1Color band on label 4Transmit optical bore 6Receive optical bore
2Alignment groove 5 Optical bore dust plug 7Color dot
3Spring clip
SINGLE-MODE
1000BASE-CWDM GBIC
CWDM-GBIC-1550=
2
5
6
1
7
3
4
84472
Table12 Gigabit Ethernet CWDM GBIC Laser Optic Parameters
GBIC Product Number CWDM GBIC Wavelength Color Identifier
CWDM-GBIC-1470= Longwave 1470 nm laser single-mode Gray
CWDM-GBIC-1490= Longwave 1490 nm laser single-mode Violet
CWDM-GBIC-1510= Longwave 1510 nm laser single-mode Blue
CWDM-GBIC-1530= Longwave 1530 nm laser single-mode Green