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18 Chapter 1 Describing the optical routing system
212257-B
Parts of the optical routing system
The optical routing system includes the following parts:
• Gigabit interface converters (CWDM GBICs)
• Optical add/drop multiplexers (CWDM OADMs)
• Optical multiplexer/demultiplexers (CWDM OMUXs)
• Optical shelf to house the multiplexers
Table 1 shows the parts of the optical routing system, and the color matching used
to distinguish the eight wavelengths.
Gigabit interface converter description
Nortel Networks* coarse wavelength division multiplexed Gigabit Interface
Converters (Figure 2) convert signals in a switch to laser light for connection to a
fiber optic network. A CWDM GBIC transmits and receives optical signals at one
of eight specific wavelengths.
Nortel CWDM GBICs use Avalanche Photodiode (APD) technology to improve
transmission distance and optical link budget.
Table 1 Parts of the optical routing system
Wavelength
(longwave) Color code
GBIC
part number
Multiplexer part number
Optical shelf
part numberOADM OMUX-4 OMUX-8
1470 nm Gray AA1419017 AA1402002 AA1402010 AA1402001
1490 nm Violet AA1419018 AA1402003 AA1402009
1510 nm Blue AA1419019 AA1402004
1530 nm Green AA1419020 AA1402005 AA1402009
1550 nm Yellow AA1419021 AA1402006
1570 nm Orange AA1419022 AA1402007 AA1402009
1590 nm Red AA1419023 AA1402008
1610 nm Brown AA1419024 AA1402011 AA1402009