FTTO缩写的意思

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