Learn about OADMs and their capabilities. Discover which statement about OADMs terminating services, passing through channels, O-E-O conversion, and FOADM/ROADM classes is false.
Table of Contents
Question
Which of the following statements about Optical Add/Drop Multiplexers (OADMs) is FALSE?
A. OADMs allow the user to terminate specific services through transponders.
B. OADMs allow the user to pass-through specific services at the wavelength optical level (express channels).
C. OADMs always require O-E-O conversion when passing-through optical channels.
D. There are two main general classes of OADMs: FOADMs and ROADMs.
Answer
The false statement about Optical Add/Drop Multiplexers (OADMs) is:
C. OADMs always require O-E-O conversion when passing-through optical channels.
Explanation
This is false because OADMs have the capability to pass-through specific wavelengths or channels optically, without requiring optical-to-electrical-to-optical (O-E-O) conversion. The signal remains in the optical domain when passing through the OADM.
The other statements are true:
A. OADMs do allow termination of specific services through transponders.
B. OADMs can pass-through express channels at the optical wavelength level.
D. The two main classes of OADMs are Fixed OADMs (FOADMs) and Reconfigurable OADMs (ROADMs).
In summary, while OADMs enable both add/drop of services with O-E-O conversion and optical pass-through of express channels, O-E-O conversion is not always required when passing through optical channels in an OADM. The optical pass-through capability is a key advantage of OADMs.
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