National Instruments PCI-8430 - Page 207

D
DB-xx subminiatureDconnector,wherexxisthenumberofpins
DCD datacarrierdetect
DCE datacommunicationsequipmentordatacircuit-terminating
equipment
DLL dynamiclinklibrary
DMA directmemoryaccess
DSR datasetready
DTE dataterminalequipment
DTR dataterminalready—theoverscoredenotesthatthesignalis
activelow
duplex themeansofbandwidthusageinaserialsystem