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ا ѧܧ SFP ާէݧ?

2010-7-20 14:09:06

 SFP ާէݧ (ѧߧڧӧ֧)
ާ֧ߧߧ ڧߧ֧֧ۧ ܧާѧܧߧ, ѧӧݧ֧ާ ާէݧ, էէ֧اڧӧѧڧ ٧ѧާ֧ߧ «ԧ֧» ֧اڧާ, ܧ ѧҧѧ ߧ ڧ٧ڧ֧ܧ ӧߧ ֧֧ ֧֧էѧ էѧߧߧ, ԧݧ ӧڧէ֧ ާ֧էߧާ ڧݧ ڧ֧ܧڧާ ܧѧҧ֧ݧާ.

֧ӧާ ާ֧ߧߧާ ڧߧ֧֧ۧѧާ ҧݧ ާէݧ GBIC (Gigabit Interface Converter), ܧ ҧ֧֧ڧӧѧݧ ֧էڧߧ ڧߧ֧֧ۧ էݧ ѧߧӧܧ ާէݧߧ ڧ֧ܧڧ ѧߧڧӧ֧. էѧݧ ӧ٧ާاߧ ѧߧӧܧ ѧ٧ݧڧߧ ڧ ѧߧڧӧ֧ (ߧѧڧާ֧, էݧ էѧݧߧ֧ 10 է 80 ܧ) ֧ڧѧݧߧ ݧ ܧާާѧ ҧ֧ ߧ֧ҧէڧާ ٧ѧާ֧ߧ էԧڧ ާէݧ֧ ѧާԧ ܧާާѧ. ԧ, ܧѧ ӧڧݧڧ GBIC, ڧ٧ӧէڧ֧ݧ ܧާާѧ Gigabit Ethernet ֧էݧѧԧѧݧ ٧ѧܧѧ٧ڧܧѧ ާէݧ, ڧާ֧ 8 ԧڧԧѧҧڧߧާ ѧާ էݧ էߧԧ ԧ ا ڧ ڧ֧ܧڧ ܧѧҧ֧ݧ֧ (ѧ ӧ֧ԧ ާߧԧާէӧ). ݧ ٧ѧܧѧ٧ڧܧ ֧ҧӧѧݧڧ էߧާէӧ ֧էڧߧ֧ߧڧ, ߧ֧ԧ ҧݧ էӧ ӧҧ:
ݧ٧ӧѧ ާ֧էڧѧܧߧӧ֧֧, ڧݧ ܧѧ է֧ݧߧ ާէݧ էݧ ܧѧاէԧ ڧ ڧ֧ܧڧ ڧߧ֧֧ۧ ѧاէѧ ڧ ڧ ѧݧ֧ߧѧڧ ӧ֧ݧ ҧݧڧ ٧ѧѧ ߧ֧ѧӧէѧߧߧ ѧէѧ. ڧݧ٧ӧѧߧڧ ֧֧ߧڧ ߧ ߧӧ GBIC, ٧ѧܧѧ٧ڧܧ ֧էݧѧԧѧ֧ ֧էڧߧ ާէݧ ݧѧާ էݧ ާ֧ߧߧ ڧߧ֧֧ۧ, ܧѧاէ ڧ ܧ ާاߧ ӧҧѧ ӧ֧ާ ާ֧ߧڧ.

֧֧ ߧ֧ܧݧܧ ݧ֧ ݧ ӧݧ֧ߧڧ ާէݧ֧ GBIC, ӧڧݧѧ ڧ ҧݧ֧ «էӧڧߧѧ» ާէڧڧܧѧڧ ߧѧ٧ӧѧߧڧ֧ SFP (Small Form Pluggable). ѧߧߧ ڧ֧ܧڧ ڧߧ֧֧ۧ - SFP ާէݧ - ҧݧ֧ ֧ 2 ѧ٧ ާ֧ߧ ԧѧҧѧڧѧ, ֧ GBIC, ߧ էէ֧اڧӧѧ ԧѧ٧է ҧݧ ܧݧ ڧݧا֧ߧڧ.

ا ѧܧ SFP ާէݧ?

SFP C Small Form Factor Pluggable ӧݧ֧ ҧ֧ڧ٧ߧѧߧߧ ާݧ֧ߧߧ ާѧ ڧ٧ӧէӧ ާ֧ߧߧ ѧߧڧӧ֧. ֧ԧݧѧާ֧ߧڧ֧ ڧ٧ӧէӧ SFP ֧ڧڧܧѧڧ֧ MSA (Multisource Agreement) ѧߧէѧ 802.z (ah) IEEE (Institute of Electrical and Electronics Engineers). ѧߧߧ ާѧ ٧ӧݧ֧ ڧݧ٧ӧѧ ֧էڧߧ է ڧ٧ӧէӧ ާ֧ߧߧ SFP ާէݧ֧, ѧ ا ҧէӧѧߧڧ, ܧ ٧ӧݧ֧ ڧݧ٧ӧѧ SFP ާէݧ. ݧڧߧӧ ߧѧڧҧݧ֧ ڧ٧ӧ֧ߧ ާڧӧ ڧ٧ӧէڧ֧ݧ֧ ڧߧݧ SFP ާѧ ڧ٧ӧէ ҧէӧѧߧڧ ӧ֧ӧڧ ߧڧ.

ڧ٧ߧѧߧߧ ާڧӧ ڧ٧ӧէڧ֧ݧ ߧڧ Tinout, ӧܧѧڧ SFP ާէݧ ӧڧ ҧ֧ߧէ. էѧߧߧ ާާ֧ߧ էܧӧ ݧڧߧ֧ۧܧ ܧާѧߧڧ Tinout ߧѧէ ӧ ާէݧ, ܧ ާԧ ߧѧէҧڧ ڧߧ֧ԧѧ ݧڧҧ ܧߧ֧ߧާ ٧ѧܧѧ٧ڧܧ GBIC է Xenpak.

֧֧ ֧ݧ ҧ ѧާ֧ ֧ڧާ֧ӧ, ܧ ӧݧ ڧݧ٧ӧѧߧڧ էѧߧߧԧ ҧէӧѧߧڧ.

֧ڧާ֧ӧ ڧݧ٧ӧѧߧڧ SFP ާէݧ֧ ֧ܧڧӧѧߧڧ, ܧߧڧԧڧӧѧߧڧ ܧݧѧѧڧ ֧ ֧֧էѧ էѧߧߧ:
- ڧҧܧ. էߧ ۧӧ, ҧݧѧէѧ֧ ѧާ էݧ SFP ާէݧ֧ ӧ٧ާاߧ էߧӧ֧ާ֧ߧߧ ڧݧ٧ӧѧߧڧ ѧ٧ݧڧߧ ڧ SFP ѧߧڧӧ֧.
ѧѧҧڧ֧ާ. ֧ӧѧ ӧ٧ާاߧ ڧݧ٧ӧѧߧڧ ѧ٧ߧ ڧ ѧߧڧӧ֧ էݧ ѧ٧ߧ ֧ ֧֧էѧ էѧߧߧ էߧ ѧܧڧӧߧ ۧӧ, ҧݧѧէѧ֧ ӧ֧ӧڧާ ѧާ (ܧާާѧ, ާѧڧ٧ѧ, ާݧڧݧ֧ܧ ڧݧ ڧݧڧ֧ݧ), ٧ӧݧ֧ ӧ֧ݧڧڧӧѧ ѧ٧ާ֧ ֧ ѧܧڧ֧ܧ ҧ֧ ԧѧߧڧ֧ߧڧ.
ާѧܧߧ. SFP ާէݧ ڧާ֧֧ ܧާѧܧߧ ѧ٧ާ֧, ڧ٧ߧѧѧݧߧ ֧է֧ݧ֧ߧߧ ӧ֧ݧڧڧߧ ާ֧էߧԧ ѧ٧֧ާ RJ-45 ҧݧѧԧէѧ ֧ާ էڧԧѧ֧ ӧܧѧ ݧߧ . ݧ٧ӧѧߧڧ ѧߧڧӧ֧ SFP ٧ӧݧ֧ ҧݧ֧ ܧߧާߧ ڧݧ٧ӧѧ ѧߧӧ ۧܧѧ ܧѧѧ.
ѧէ֧اߧ. SFP ާէݧ ߧ ֧ҧ֧ էݧߧڧ֧ݧߧ ڧߧڧܧ ݧ֧ܧڧѧߧڧ. ڧѧߧڧ ѧߧڧӧ֧ ֧ӧݧ֧ ߧ֧֧էӧ֧ߧߧ ֧֧ (ݧ) ѧܧڧӧߧԧ ҧէӧѧߧڧ, ܧ ѧߧѧӧݧڧӧѧ֧ ѧߧڧӧ֧. ٧ӧݧ֧ ڧܧݧڧ ڧ ڧ֧ާ էݧߧڧ֧ݧߧ ڧߧڧ ݧ֧ܧڧѧߧڧ ߧڧ٧ڧ ֧ݧէѧ ӧߧ ۧܧ (ܧѧ), ѧܧڧ ҧѧ٧, ӧ֧ݧڧڧӧѧ ֧֧ߧ ܧѧ٧ۧڧӧ ӧ֧ԧ ٧ݧ ֧ݧ. ާ ԧ SFP ާէݧ ӧݧߧ֧ ߧ ާ֧ѧݧݧڧ֧ܧ ܧ, ܧ ٧ѧڧѧ֧ ۧӧ ݧѧۧߧ ާ֧ѧߧڧ֧ܧڧ ӧ֧اէ֧ߧڧ.
ѧާ֧ߧ֧ާ. ֧ӧ֧ ӧ٧ާاߧ ٧ѧާ֧ߧ SFP ާէݧ ҧ֧ ܧݧ֧ߧڧ ֧֧٧ѧԧ٧ܧ ߧӧߧԧ ҧէӧѧߧڧ (ܧާާѧ, ާѧڧ٧ѧ, ާݧڧݧ֧ܧ ڧݧ ڧݧڧ֧ݧ). ѧߧߧѧ ߧܧڧ ѧ ا ѧ ߧѧ٧ӧѧ֧ (HotSwap) ߧ ֧ܧѧߧ էէ֧اڧӧѧ֧ SFP ާէݧ ܧާѧߧڧ Tinout.
ܧߧާڧߧ. ڧާ ѧߧڧӧ֧ SFP ߧߧ ߧڧاѧ֧, ߧ ֧ԧէߧߧڧ է֧ߧ ٧ӧݧ֧ ڧ ݧߧ ާ֧ ܧߧܧڧӧѧ ڧߧާ ֧֧ߧڧާ ڧ֧ܧԧ ܧߧӧ֧ڧӧѧߧڧ էҧߧԧ ӧߧ. ѧڧާ֧, ѧէڧڧߧߧ ڧݧ٧֧ާާ ާ֧էڧѧܧߧӧ֧֧ѧާ.

ڧӧѧ էѧߧߧ ֧ڧާ֧ӧ, էڧߧѧާڧܧ ֧֧է էާӧ ֧֧ ާ֧էڧܧߧӧ֧֧ ߧ SFP ާէݧ, ֧ߧڧ ֧֧ ֧֧էѧ էѧߧߧ Fast Ethernet, ٧ѧާ֧ߧ ѧ֧. ѧߧ, ٧ߧѧڧ֧ݧߧ ߧѧҧݧէѧ֧ ڧݧ٧ӧѧߧڧ CWDM SFP ާէݧ֧.

֧٧ާ

ݧ٧ӧѧߧڧ SFP ާէݧ֧ ӧݧ֧ ڧާѧݧߧ ֧֧ߧڧ֧ ֧ߧڧ ֧ ֧֧էѧ էѧߧߧ ݧӧڧ ܧѧڧߧܧԧ ߧܧ. ֧ԧէߧߧڧ է֧ߧ, Tinout C էڧ ڧ ݧڧէ֧ ѧӧ ֧ӧڧߧԧ ҧ֧֧֧ߧڧ ֧ݧ֧ܧާާߧڧܧѧڧߧߧԧ ҧէӧѧߧڧ, ѧܧڧӧߧ ѧӧ֧ էӧڧا֧ߧڧ ӧߧ֧է֧ߧڧ էѧߧߧԧ էܧ ܧѧڧߧ, ѧ ا ѧߧѧ .

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