HIKVISION DS-7204HVI-ST Technical Manual page 20

Multiple recording types, including manual, continuous, alarm, motion,
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motion | alarm and motion & alarm recording, etc.
8 recording time periods with separate recording types.
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Pre-record and Post-record time for alarm and motion detection, and
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pre-record time for schedule and manual recording.
Lock and unlock of video files.
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HDD property can be set to read-only.
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Video data search and playback by channel number, recording type,
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time etc.
Digital zoom function in playback mode.
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Pause, play fast, play slow, skip forward, and skip backward when
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playback, locating in progress bar by dragging the mouse.
4-channel synchronous playback.
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Backup
Record files backed up via USB device.
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Bunch backup by file or by time.
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Record files edited for backup in playback.
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Management and maintenance for backup devices.
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Alarm & Exception
Configurable arming time for alarm in/out.
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Various alarm types supported: alarms for video loss, motion detection,
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video tempering, video signal abnormal, video in/out format
unmatched, illegal access, network disconnection, IP conflict, hard disk
error and hard disk full.
Various alarm response actions supported: camera recording, relay out,
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on-screen warning, audible warning and upload to center, etc.
Auto recovery from exceptions.
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Others
Control of DVR via front panel keys, mouse and IR control.
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Three-level user management, each user with individual operating
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permission for DVR and camera.
Powerful record and search for log of operation, alarm and exceptions.
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Import/export of device configuration files.
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Network
10/100M adaptive network interface.
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TCP/IP protocol suites, PPPoE, DHCP, DNS, DDNS, NTP, SADP protocols,
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etc.
Unicast and multicast supported; TCP and UDP protocols applicable in
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unicast transmission.
Remote search, playback and download, lock/unlock of video files;
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Hikvision Technical Manual