PDH mea hoʻolele uila(Plesiochronous Digital Hierarchy), kahi ʻōnaehana hoʻoili kikohoʻe quasi-synchronous. ʻO nā transceivers optical PDH he mau transceivers optical liʻiliʻi. Hoʻohana pinepine ʻia nā transceivers optical PDH i nā pālua, i kapa ʻia hoʻi nā noi point-to-point. ʻO ka mana maʻamau ʻo 4E1, 8E1, 16E1.

PDH optical transceiver hana: PDH optical transceiver ua kūpono no ka liʻiliʻi liʻiliʻi hoʻololi pūnaewele, mea hoʻohana loop network, kelepona kelepona (base station), pilikino pūnaewele, DDN network, etc.

Nā hiʻohiʻona o ka PDH optical transceiver:
Hoʻohana ia i ka chip integrated super large-scale, nona nā hiʻohiʻona o ka hoʻohana haʻahaʻa haʻahaʻa a me ka hilinaʻi kiʻekiʻe. Hāʻawi i ka hana hoʻāʻo loopback mamao E1, maʻalahi e mālama. Hāʻawi i 4 E1 awāwa; Loaʻa iā ia kahi hana hoʻāla piha, hiki ke hōʻike i nā ʻōhua kūloko a mamao. Hiki ke hōʻike ʻia ka ʻike makaala (me ka puʻupuʻu hiki ʻole o ka mana) i ka hoa ma o ke kahawai hoʻokele pūnaewele. Ke hoʻohana nei i ka transceiver integrated optical device, kūpaʻa a hilinaʻi i ka hana hana. ʻO ka hoʻolālā papa hoʻokahi o ka mīkini holoʻokoʻa he liʻiliʻi a maʻalahi hoʻi e hoʻohana.

ʻEhā mau pono o ka PDH optical transceiver:
1. ʻO kahi maʻamau maʻamau i hui pū ʻia a me kahi helu bit unified e hāʻawi i ka hiki ke hoʻopili ma waena o nā mea hana mai nā mea hana like ʻole.
2. Ua hoʻomaikaʻi nui ʻia ka hiki i ka hoʻokele pūnaewele.
3. ʻO ka manaʻo manaʻo hou o ka pūnaewele ho'ōla pono'ī. Ke ʻoki ʻia ka hōʻailona nui o ka media hoʻouna, e hoʻomaka hou ia i ke kamaʻilio maʻamau ma o ka pūnaewele hoʻōla ponoʻī. v
4. Hoʻohana ʻia ka ʻenehana byte multiplexing e hana maʻalahi nā hōʻailona lālā o luna a lalo i ka pūnaewele.

Ma muli o ka loaʻa ʻana o ka PDH i nā mea maikaʻi loa i ʻōlelo ʻia ma luna, e lilo ia i hoʻokahi o nā ʻenehana kumu e ʻike ai i ka ʻike superhighway. Akā, ma nā alanui lālā a me nā ala ʻōpuʻu e pili ana me ke alaloa ʻike, e hoʻohana mau ʻia nā lako transceiver optical PDH.

PDH optical transceiver hoʻopiha nui i ka E1 a me ka ʻoihana Ethernet, a ʻike i ka hana kamaʻilio point-to-point o ka hōʻailona E1 a me ka hōʻailona Ethernet ma o ka multiplexing i ka 1 optical signal transmission. Noho liʻiliʻi ka lumi, hoʻonohonoho maʻalahi, pale lako mana pālua.