Negotiation to 1 Gbps is not supported. Since 8 and 16 Gbps equipment is more
sensitive, the existing cable plant may require additional attention to cable care
after upgrading from 2 or 4 Gbps fibre. In a few cases, the Tx power of the switch
can be higher than the connected equipment. In nearly all of those cases, there is
enough attenuation in the existing cable plant so as not to require additional
attenuation. The common 2 Gbps SFP Rx maximum power levels are listed in
Table 18 and can be used as a quick method to relieve concerns of over saturation.
Table 18. Maximum receive power of 2 Gbps LWL SFPs
Vendor Part number Description
Max Receive Power
(dB)
Avago AFCT-57M5ATPZ 2 Gbps 10 km SFP -3 dB
Finisar FTLF1319P1xTL 2 Gbps 10 km SFP 0 dB
Finisar FTRJ1319P1xTL 2 Gbps 10 km SFP 0 dB
JDSU JSH-12L1DD1 2 Gbps 10 km SFP 1 dB
Hitachi Cable HTR6517 2 Gbps 10 km SFP -3 dB
Optoway SPS-9110FG 2 Gbps 10 km SFP -3 dB
Optoway SPS-9110AFG 2 Gbps 10 km SFP -3 dB
JDSU JSH-21L3AR3 2 Gbps 10 km SFP 1 dB
E20 ES212-LP3TA 2 Gbps 10 km SFP -3 dB
46 SAN48B-5 Installation, Service, and User Guide
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