PDH transceiver ngwa anya(Plesiochronous Digital Hierarchy), usoro mgbasa ozi dijitalụ na-emekọrịta ihe. Ndị transceivers anya PDH bụ obere ikike transceivers anya. A na-ejikarị transceivers anya PDH na ụzọ abụọ, nke a na-akpọkwa ngwa-na-atụ. Ike bụ n'ozuzu 4E1, 8E1, 16E1.

Ọrụ transceiver optical PDH: PDH optical transceiver dabara maka ịkparịta ụka ngbanwe obere ikike, netwọkụ loop onye ọrụ, nkwukọrịta ekwentị (ọdụ ọdụ), netwọkụ nkeonwe, netwọkụ DDN, wdg.

Atụmatụ nke transceiver anya PDH:
Ọ na-anabata mgbawa agbakwunyere nnukwu nnukwu, nke nwere njirimara nke oriri ike dị ala yana ntụkwasị obi dị elu. Nye ọrụ nnwale loopback dịpụrụ adịpụ E1, dị mfe idowe. Na-enye 4 E1 ọwa; nwere ọrụ oti mkpu zuru oke, nke nwere ike igosipụta mkpu mpaghara na nke dịpụrụ adịpụ. Enwere ike ịkọrọ ndị ọgbọ ozi mkpu (gụnyere mkpu ọdịda ike) site na ọwa njikwa netwọkụ. Iji ngwaọrụ ngwa anya agbakwunyere transceiver, arụ ọrụ kwụsiri ike na ntụkwasị obi. Nhazi otu osisi nke igwe dum dị obere na nha ma dị mfe iji.

Uru anọ nke transceiver anya PDH:
1. Otu ọkọlọtọ interface dị n'otu na ọnụ ọgụgụ bit dị n'otu na-enye ohere nke njikọ n'etiti ngwaọrụ sitere na ndị nrụpụta dị iche iche.
2. Ikike na njikwa netwọkụ emeela ka ọ dịkwuo mma.
3. N'ụzọ doro anya, a na-atụpụta echiche ọhụrụ nke netwọk na-agwọ onwe ya. Mgbe a na-ebipụ isi mgbaàmà nke mgbasa ozi mgbasa ozi, ọ ga-amaliteghachi nkwurịta okwu nkịtị site na netwọk na-agwọ onwe ya. v
4. A na-anakwere teknụzụ multiplexing Byte iji mee ka akara ngosi alaka dị elu na nke ala na netwọk dị mfe.

N'ihi na PDH nwere uru ndị a kpọtụrụ aha n'elu, ọ ga-abụ otu n'ime teknụzụ ndị bụ isi iji ghọta ozi superhighway. Mana n'okporo ụzọ alaka na okporo ụzọ ndụdụ ejikọtara na okporo ụzọ ozi, akụrụngwa transceiver anya PDH ka ga-aba uru.

PDH optical transceiver na-emecha nweta ohere azụmahịa E1 na Ethernet, wee chọpụta ọrụ nzikọrịta ozi nke akara E1 na akara Ethernet site n'ịba ụba na nnyefe ngwa anya 1. Were obere oghere, nhazi mgbanwe, nchekwa ọkụ abụọ.