Nrog rau txoj kev loj hlob sai ntawm kev sib txuas lus thoob ntiaj teb, lub luag haujlwm ntawm kev sib txuas lus sib txuas tau yog ntau dua thiab tseem ceeb. Tam sim no, DWDM thiab OTN (Optical Transport Network) thev naus laus zis tau siv dav hauv Kev sib txuas lus Network kev tsim kho. DWDM thev naus laus zis zoo heev txhim kho lub peev xwm ntawm Optical fiber Network, tab sis nws tsis txaus nyob rau hauv Optical sau teeb liab kev ua haujlwm thiab kev ua lag luam lub sijhawm, tsis tuaj yeem ua tau raws li cov kev cai siab ntawm kev siv cov ntaub ntawv dav dav. Raws li qhov khoom tsim kho ntawm DWDM thev naus laus zis, OTN muaj ntau yam ntawm cov neeg yuav khoom teeb liab ntim thiab kis tau pob tshab, loj qhov loj bandwidth rov siv dua, yooj ywm hla thiab teeb tsa lub sijhawm, muaj peev xwm sab saum toj thiab saib xyuas kev tswj muaj peev xwm, thiab txhim kho kev sib tham thiab kev tiv thaiv kev muaj peev xwm. OTN cov cuab yeej maj mam hloov cov khoom DWDM nrog nws cov txiaj ntsig zoo.
Nrog cov kev loj hlob tsis tu ncua ntawm cov ntaub ntawv theem thiab cov kev pabcuam bandwidth, OTN, ua cov khoom lag luam ntawm DWDM, tsim cov qub thiab sib koom ua ke ntawm qhov zoo ntawm SDH thiab WDM, thiab nthuav cov network muaj nuj nqi haum rau cov kev pabcuam kev sib kis. Hauv kev thov ntawm network, kev muaj peev xwm, kev muaj peev xwm nkag tau lag luam, kev tswj hwm kev tswj hwm network tau zoo dua, tuaj yeem ua tau raws li cov kev xav tau ntawm kev ua lag luam tshiab.
