Nortel Networks CWDM SFP - Manual (Page 32)

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Note: A minimum attenuation of 5 dB must be present
between the transmitter and receiver. To avoid receiver
saturation, you must insert a minimum attenuation of 5
dB when:
•
testing the CWDM SFP GBIC in loopback mode
• using short runs of fiber with no intermediate
CWDM OADM or CWDM OMUX
To determine the expected signal loss for a CWDM
OADM, CWDM OMUX, or fiber length, see Installation
and Networking Guidelines for Optical Routing, part
number 212257-A.
Given a loss budget of 24 dB and assuming fiber loss of
.25 dB/km, up to 96 km reach is supported with no
intermediate CWDM OADM or CWDM OMUX.
CWGBIC.fm Page 30 Wednesday, December 12, 2001 11:26 AM