A technician accidentally patches a CWDM transceiver module transmitting at 1470nm into a DWDM multiplexer designed for the C-band. What will happen?
Answers
AThe CWDM laser will burn out the DWDM filters
BThe DWDM multiplexer will block the signal entirely
CThe multiplexer will shift the wavelength to 1550nm automatically
DThe signal will pass through normally
Correct answer: B — The DWDM multiplexer will block the signal entirely
DWDM multiplexers have very narrow passbands (e.g., in the 1530-1565nm range). A 1470nm CWDM signal will simply be filtered out (blocked) and won't pass through.
MIFOTRA exam practicealigned to TIA-568.3-D / ITU-T G.652·3 marks·Medium