ZMODO ZP-IBH13-P 720P HD H.264 PoE IP Infrared Weatherproof Camera with QR Code Smartphone Setup - Manual of How to Access IP Camera - Manual (Page 56)

Chapter 3 Access to IP Camera on Zviewer PC
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3.4.4 Two-way Audio (Only for Device Which Supports this Function)
1. Under real-time video, “Voice” and “Talkback” functions are turned off by default. Click a device from
the Device List.
2. Click [ ] to enable voice function, the voice icon will change to [ ].
3. Click [ ] to enable talkback function, the talkback icon will turn green [ ].
4. Now you can speak and hear through the IP camera using a PC with two headsets (one in PC, the
other in IP Camera), (As Figure 38).
Figure 38
Note
With exclusive mode, when Zviewer enables a device
’s talkback and voice function, other device’s
voice function can be initiated, while talkback function cannot be initiated.