Optical Supervisory Channel Ntawm DWDM System
Hauv DWDM system, ib qho kev ywj pheej 1510nm wavelength (tus nqi ntawm 2Mb/s) yog siv los nqa Optical Supervisory Channel (OSC) los xa cov kev tswj xyuas network, cov ntaub ntawv ua lag luam thiab kev saib xyuas, thiab cov qauv qauv ua raws li G. 704, tus nqi xa tawm tiag tiag rau kev soj ntsuam cov ntaub ntawv yog 1920kb/s. OSC kho qhov muag saib channel yog cov ntaub ntawv nqa khoom ntawm kev ua haujlwm ntawm DWDM system. Nyob rau hauv lub DWDM system, OSC yog ib tug kuj ywj siab subsystem, uas xa cov txij nkawm thiab kev tswj cov ntaub ntawv ntawm optical channel txheej, optical multiplexing seem txheej thiab optical transmission seem txheej, muab kev sib txuas lus thiab cov neeg siv, thiab tseem tuaj yeem muab lwm yam ntxiv. muaj nuj nqi. Lub luag haujlwm tseem ceeb ntawm OSC yog: OSC channel txais tos thiab xa tawm, moos rov qab thiab rov tsim dua tshiab, txais tos ntawm lub moos sab nraud, OSC channel nrhiav pom thiab ua haujlwm thiab saib xyuas kev ua tau zoo, CMI codec, OSC ncej positioning thiab framing processing, saib xyuas cov ntaub ntawv ua. Kev saib xyuas kev ua tau zoo (B1, J0, OPM, optical amplifier monitoring) tuaj yeem ua tiav los ntawm lub davhlau ya nyob twg kev pabcuam. Kev saib xyuas kev ua haujlwm analog thiab B1 yuam kev saib xyuas muaj nuj nqi muab ntau txoj kev kho qhov muag channel kev saib xyuas (nrog rau txhua qhov channel wavelength, optical power, thiab optical signal-to-noise ratio) yam tsis muaj kev cuam tshuam cov kev pabcuam, raws sijhawm saib xyuas kev ua tau zoo ntawm cov khoom siv kho qhov muag thiab optical channel, thiab muab qhov chaw txhaum. zoo txhais tau tias. Nws muaj kev ua haujlwm ntawm kev saib xyuas cov tswv yim kho qhov muag, tso zis hluav taws xob kho qhov muag, PUMP tsav tam sim no, PUMP txias tam sim no, PUMP kub thiab PUMP rov qab kho qhov muag lub zog ntawm lub amplifier. Nws muaj qhov ua tau zoo ntawm kev saib xyuas ntau qhov kev coj ua yoj tus lej, wavelength ntawm txhua qhov channel, lub zog kho qhov muag thiab kho qhov muag teeb liab-rau-lub suab sib piv. Kev soj ntsuam wavelength qhov tseeb tuaj yeem ua tau ntau dua 0.05nm, qhov tseeb lub zog hluav taws xob tuaj yeem ua tau ntau dua 0.5dBm, thiab cov teeb liab-rau-suab nrov piv qhov tseeb tuaj yeem ntau dua 0.5dB.
