PDH transceiver optik (Plesiochronous Digital Hierarchy, quasi-synchronous digital series) yaiku transceiver optik kapasitas cilik, aplikasi sing umume dipasangake, uga disebut aplikasi titik-kanggo-titik, lan kapasitas umume 4E1, 8E1, 16E1.Sabanjure, JHA TECHNOLOGY bakal ngenalake advan ...
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