SONET: synchronous optical network, njira yotumizira digito, inayambika ku United States mu 1988. Chizindikiro chamagetsi cha 1 chimatchedwa STS-1, ndipo mlingo wa 1 kuwala umatchedwa OC-1, ndi mlingo wa 51.84Mb /s. Pazifukwa izi, sinthani kudzera mu multiplexing kuti mupititse patsogolo liwiro la kufalitsa ndi kufalitsa bwino.Kenako, ITU-T inakhazikitsa muyezo wapadziko lonse wa SDH wapadziko lonse lapansi potengera muyezo uwu, kotero SONET ikhoza kuwonedwa ngati gawo la SDH.
SONET imatanthauzira mawonekedwe anayi owoneka bwino, kuchokera pamwamba mpaka pansi ndi:
1. Fotoni wosanjikiza (Photonic Layer) imayendetsa kufalikira kwa pang'ono kudutsa chingwe cha kuwala, ndipo imayang'anira kutembenuka pakati pa chizindikiro cha magetsi cha synchronous transmission (STS) ndi chizindikiro cha kuwala kwa chonyamulira cha kuwala (OC). Kuyankhulana kumachitidwa ndi otembenuza ma electro-optic mu gawo ili.
2. Gawo lachigawo (Gawo Layer) limatumiza mafelemu a STS-N pa chingwe cha kuwala.Ili ndi ntchito yojambula ndi kuzindikira zolakwika.
Zigawo ziwiri zomwe zili pamwambazi ndizofunikira, koma zigawo ziwiri zotsatirazi ndizosankha.
3. Mzere wa mzere (Line Layer) uli ndi udindo wogwirizanitsa njira ndi multiplexing, ndi chitetezo chokha cha kusinthanitsa.
4. Njira yosanjikiza (Path Layer) imakhudzana ndi kutumiza ntchito pakati pa zida zapanjira PTE (Path Terminating Element), Pa PTE iyi ndikusinthandi luso la SONET. Njira yosanjikiza imakhalanso ndi mawonekedwe a ma network omwe si a SONET.
Zigawo zinayi izi zitha kuwoneka ngati kugawikana kwa gawo la thupi la OSI 7 lachitsanzo, chifukwa zigawo zonse zinayi zili mu gawo la OSI physics.
SONET Malo omwe amagwiritsidwa ntchito kwambiri ndi kuchuluka kwake komwe kumaperekedwa:
OC-1 - 51.84Mbit / s
OC-3 - 155.52 Mbit / s
OC-12 - 622.08 Mbit / s
OC-24 - 1.244 Gbit / s
OC-48 - 2.488 Gbit / s
OC-96 - 4.976 Gbit / s
OC-192 - 9.953 Gbit / s
OC-256 - pafupifupi 13 Gbit / s
OC-384 - pafupifupi 20 Gbit / s
OC-768 - pafupifupi 40 Gbit / s
OC-1536 - pafupifupi 80 Gbit / s
OC-3072 - pafupifupi 160 Gbit / s
Tikulankhula za maukonde a synchronous CHIKWANGWANI, mawu oyamba ndi zomwe zili pamwambapa. Pazida zofananira za fiber network zomwe zimakhudzidwa ndi Shenzhen HDV Photoelctron Technology Co., Ltd., monga: ACONU/KulumikizanaONU/ WanzeruONU/ Kuwala kwa fiberONU/ XPONONU/ GPONONU, kapenaOLTseries, transceiver series ndi zina zotero. Ndi mtundu wa zida zamtundu, ngati pakufunika makasitomala, mutha kubwereranso kutsamba lanyumba kuti mulumikizane ndi kampani yathu, ndikudikirira kukhalapo kwanu.
