Chapter 5:  5953 USB DynaKey Migration  5-5 
 
Furthermore,USBdefinesseverallevelsofstandards,includinga
standardforHumanInterfaceDevices.Thisstandardspecifies
behaviorformanydevicesthatarewidelyusedinthecomputer
industry,andallowsproprietaryextensionstobeaddedforthose
devicesthatarelesswidelyused.NCR’skeyboardincludesbothfully
standard
HIDdevices,suchasthekeyboarditselfandtheMSR,and
less‐widelyusedandthuscustomizedHIDdevicessuchastheKeylock
andErrorTone.
TheUSBDynaKeyimplementsastandardseven‐portUSBHub
internally,whichprovidesindependentconnectivitytotheseveral
functionalsectionsthatcomprisetheDynaKey.
Both
USBandWedgeNCRDynaKeysincludekeysthataccept
customer‐specifiedkeycapsandlabels.Forexample,onecustomer
maywishtoincludebuttonsforDEPT,CLASS,andSKUonhis
keyboard.Adifferentcustomermayhavenouseforthesekeys,but
maywantTIRES,BATTERIES,and
ACCESSORIESonspecifickeys.
Capablekeysprovideforthiscustomization.