red-wolf

I am very interested in purchasing a Dahua Tribrid DVR. The ability to reuse some existing analog cameras and try the newer CVI type of cameras and IP cameras to boot. I noticed that there are generally 1 audio input and at the most 4 audio inputs on the Tribrid DVR's. I need to have audio with video on my system. I looked at the setup for a few models and there is an internal and audio input option for each camera. I can not find a HDCVI camera with built in mic except for PTZ models. If you can port audio inputs to multiple channels that would work but I can not verify if that is possible, eg. audio input 1 connects to channel 1 and 2 audio input 2 connects to channel 3 and 4 and different variations. also can someone give an explanation of "reuse audio in and out " for 2 way comms thanks in advance.

Thank you for that info on the all audio inputs unit 7816 . It would be more cost effective to purchase a 8 channel unit with 4 audio inputs. that way i could reuse 4 non CVI cameras with audio and 2 IP cameras with built in MIC. and wait to see if I can find a relatively inexpensive CVI camera that has built in MIC. I find it rather odd that built in mic on CVI cameras are almost impossible to find. Has anyone seen any CVI with MIC built in ?

So then: audio input 1 is dedicated to channel 1 audio input 2 is dedicated to channel 2 audio input 3 is dedicated to channel 3 audio input 4 is dedicated to channel 4 for someone that has a need to have audio and video for all channels it makes it very hard to find a product to fullfill those requirements. Geovision was able to give you 16 audio channels on a PCI crd using a 15 pin pig tail adapter. It really would not be a problem if HDCVI cameras were EASILY available with built in microphone. Perhaps that will change in the near future.