I-PDH optical transceiver(I-Plesiochronous Digital Hierarchy), isistimu yochungechunge lokudlulisa idijithali elingana ne-quasi-synchronous. Ama-transceiver optical we-PDH ama-transceiver optical amancane anekhono elincane. Ama-transceiver optical e-PDH ngokuvamile asetshenziswa ngababili, abizwa nangokuthi izinhlelo zokusebenza zokukhomba-kuya-phuzu. Umthamo ngokuvamile uthi 4E1, 8E1, 16E1.

Umsebenzi we-PDH optical transceiver: I-PDH i-transceiver optical ifaneleka kunethiwekhi yokushintsha amandla amancane, inethiwekhi ye-loop yomsebenzisi, ukuxhumana kweselula (isiteshi sesisekelo), inethiwekhi yangasese, inethiwekhi ye-DDN, njll.

Izici ze-PDH optical transceiver:
Yamukela i-chip enkulu edidiyelwe enkulu, enezici zokusetshenziswa kwamandla okuphansi nokuthembeka okuphezulu. Nikeza umsebenzi wokuhlola we-loopback we-E1, kulula ukuwunakekela. Inikeza iziteshi ze-4 E1; inomsebenzi we-alamu ophelele, ongabonisa ama-alamu asendaweni nakude. Ulwazi lwe-alamu (okuhlanganisa i-alamu yokuhluleka kwamandla) lungabikwa kontanga ngesiteshi sokuphatha inethiwekhi. Ukusebenzisa amadivaysi optical ahlanganisiwe e-transceiver, ukusebenza okuzinzile nokuthembekile. Umklamo webhodi elilodwa lomshini wonke mncane ngosayizi futhi kulula ukuwusebenzisa.

Izinzuzo ezine ze-PDH optical transceiver:
1. Izinga lokusebenzelana elihlanganisiwe kanye nenani elincane elihlanganisiwe linikeza ithuba lokuxhumana phakathi kwamadivayisi avela kubakhiqizi abahlukene.
2. Amandla okuphatha inethiwekhi athuthukiswe kakhulu.
3. Ngokwethiyori, kuhlongozwa umqondo omusha wenethiwekhi yokuziphilisa. Uma isignali eyinhloko yemidiya yokudlulisela inqanyuliwe, izoqala kabusha ngokuzenzakalelayo ukuxhumana okuvamile ngenethiwekhi yokuziphilisa. v
4. Ubuchwepheshe be-Byte multiplexing bamukelwa ukwenza amasignali egatsha aphezulu naphansi kunethiwekhi abe lula kakhulu.

Ngenxa yokuthi i-PDH inezinzuzo eziphawulekayo ezibalwe ngenhla, izoba obunye bobuchwepheshe obuyisisekelo ukuze uthole ulwazi lomgwaqo onguthelawayeka omkhulu. Kodwa emigwaqweni yegatsha nasemigwaqweni yemfoloko exhunywe nothelawayeka wolwazi, okokusebenza kwe-PDH optical transceiver kusazoba usizo.

I-PDH optical transceiver ngokuyinhloko iqedela ukufinyelela kwebhizinisi kwe-E1 ne-Ethernet, futhi ibona umsebenzi wokuxhumana wephuzu-kuya-iphuzu wesignali ye-E1 kanye nesignali ye-Ethernet ngokuphindaphinda ku-1 ukudluliselwa kwesignali yokubona. Thatha isikhala esincane, ukucushwa okuvumelana nezimo, ukuvikelwa kokuphakelwa kwamandla okukabili.