PDH optical transceiver (Plesiochronous Digital Hierarchy, quasi-synchronous digital series) yog lub peev xwm me me optical transceiver, feem ntau ua ke daim ntawv thov, kuj hu ua point-to-point applications, thiab lub peev xwm feem ntau yog 4E1, 8E1, 16E1.Tom ntej no, JHA TECHNOLOGY yuav qhia cov advan ...
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