HDB缩写的意思

QDOS STB FED DPON DFOS EAF MADP NDS S3 DCT DS GDPS ASI ESC IM RAID FCN ETE EFCI AP CRC IS-IS RIP DFSK DVC ASC CAI ppm IOB DCN SSG NCBA SFB Bps SSM EEROM CSE APARS CICS GPS CPM DVVI CNCC SOC CTDM ABDL DTP APADAS GIMM EF UMTS CC mcu CPS EELS DL AFC DTD AJG EWT