Can I add more cameras to an NVR even though I'm using all of the supported channels?


No. You can only add as much devices (cameras) to the NVR as it supports. You can find this information in the data sheet of the recorder.

Ex: You have a DS-7608NI-I2/8P and 8 cameras already added to the NVR (which is the amount it supports). You cannot add any more than 8 cameras/devices since the NVR only supports 8 channels (devices/cameras).

** Screenshot taken from the DS-7608NI-I2/8P's data sheet.