?????

????

1??????????????????????(Local)?????(Backup)?????(Main)??????????????????????????????????????????
2???????????,?????????????????????????????????????????????????????????
3?????????????????????????????????????????????
4???100Base-FX?622Base-FX?1250Base-FX???????????????????????
5??????????????120???
6???????????????????????????
7???????????????????????????
8??????????????????????????????????????????????????????????????????????????????????????

????

????

?????????????????????????????????????
?????????????????????????????
???????????????????????????????
???????????????155Mbit/s?622Mbit/s?1.25Gbit/s???????? 
 
???????LED??????

???? ??? ??????????
???? ??? ?????????
???? ??? ??????????????
???????? ??? ?????????? LED ???????
?????????????????????10???
??????????????????????5?????????????????????????????????????
??????????????LED????????????????????????????????
??????????????2???????
???????????????1??????????1????????LED???????????? 
 
????

???????SC/ST/FC???/????????9/125?10/125um?????50/125?62.5/125um?????
LED???Local??????Backup??????Main??????????
?????155Mbit/s?622Mbit/s?1.25Gbit/s???????
?????
??220?165—260??50Hz?1A
??+48V;1A
??+24V?1A
??+5V;1A
???< 4W
?????850nm?1310nm?1550nm???
???????0.2mw/?
???????0—60?
?????-20—70?
???5?—90%,????
?????140mm×111mm×30mm??×?×??
???????? 
 
????

???????????

??????155Mbit/s?622Mbit/s?1.25Gbit/s????????
??????155Mbit/s?622Mbit/s?1.25Gbit/s????????
??????155Mbit/s?622Mbit/s?1.25Gbit/s????????
??????155Mbit/s?622Mbit/s?1.25Gbit/s????????
?????????SC??????????????????

??????

????-?????????

?????????????????????????????????????TX??????????????RX????????????RX?????????????TX????2??

????-?????????

?????????????????????????????????????TX??????????????RX????????????RX?????????????TX????????????A??B??????????3??

????-?????????

????????????????TX/RX???????????TX/RX?????????????????A??B?????????????A???????B??????B???????A????4??
 

??????????Main ???????????????????????? Backup ?????????????? Main ?????? Backup ????? Main ???????????????????