NEC NRS Expanded Series Configuration Manual page 40

Remote keyboard operation.
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Remote locking and unlocking of control panel and mouse.
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Remote HDD formatting and program upgrading.
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Remote system restart and shutdown.
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RS-232, RS-485 transparent channel transmission.
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Alarm and exception information can be sent to the remote host
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Remotely start/stop recording.
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Remotely start/stop alarm output.
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Remote PTZ control.
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Remote JPEG capture.
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Virtual host function is provided to get access and manage the IP camera directly.
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Two-way audio and voice broadcasting.
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Embedded WEB server.
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Features-4 NVR Configuration Guide (Advanced) for NRS Expanded Series