PDH whatu transceiver (Plesiochronous Digital Hierarchy, quasi-syncronous digital series) he iti-kaha te whakawhiti whatu, i te nuinga o nga wa e hono ana nga tono, e kiia ana ko nga tono tohu-a-ira, a ko te kaha ko te tikanga 4E1, 8E1, 16E1.I muri mai, ka whakauruhia e JHA TECHNOLOGY te advan ...
Pānuitia atu