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Appendix C: The meaning of some abbreviations
Letters
Meaning
Letters
Meaning
D
720*576(PAL)/720*480(NTSC)
H
720*288(PAL)/720*240(NTSC)
C
360*288(PAL)/720*240(NTSC)
NT
A network event
U
Unlock
L
lock
MD
Motion detection
SD
Sensor detection
PW
An event of power on occurred
VL
Video loss
AL
Alarm
DB
The data base recurred or united
HD
An event concerning HDD occurred
TM
Time change
SY
An event of system setup or system
reset
FL
A file was created or deleted
DVR
Digital video recorder
DEL
File was deleted
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