PDH optical transceiver (Plesiochronous Digital Hierarchy, quasi-synchronous digital series) ndi transceiver yaing'ono yamagetsi, yomwe nthawi zambiri imaphatikizidwa, yomwe imatchedwanso kuti point-to-point applications, ndipo mphamvu nthawi zambiri ndi 4E1, 8E1, 16E1.Kenako, JHA TECHNOLOGY iwonetsa advan ...
Werengani zambiri