joms

I have recently installed three 1.3MP IP Cam (AVTECH 328A). I have looked at the NVR of AVTECH and it doesnt look that impressive. Can I just use any NVR with my IP Cam? I want an NVR with at least 1 audio in. My camera has an Audio In plug (like that of a headphone jack) but I can't figure out why there's no sound when I hook up my external mic (which isnt from AVTECH since they don't sell any mic but it is a CCTV mic). I tried the mic on a self powered speaker and it works. I just can't get it to work when plugged to my IP cam. (Note: the mic has an external power source 12V 100ma) In any case, am I stuck with Avtech NVR only? Or can I use any other NVR? I can't really test and return items since I live in the Philippines so I must blindly ship the item here from abroad so I need to be certain that this NVR would work with my IP Cam. Note: It says in my IP Cam manual that it is ONVIF Compatible which indicates that it will connect with other NVRs. Is this true ? So basically, why I don't want the Avtech NVR is because: 1) It doesn't have an audio Input 2) It only works with Microsoft Windows (Internet Explorer). I need it to work with my Macbook Pro Avtech AVM328A URL of my Camera http://www.avtech.com.tw/index.php?option=com_k2&view=item&id=63