Do all 16 channels have bi-directional audio capability on the DX4700/DX4800 Series HVRs?
Pelco Video Management
DX4700/DX4800 Series hybrid video recorder (HVRs)
Utilize more than one channel bi-directional audio at once.
Yes, but not simultaneously. The system has the capacity for one channel bi-directional audio at a time.
To hear live and playback audio at the server, connect a speaker to Audio Out 1.
To hear live audio received from the DX Series client, connect a speaker to Audio Out 2.