I have a potential customer who has some existing Axis and IQinVision IP cameras with a failing NVR.  I'm wondering if the NVR-ELC-16-POE16 is compatible with other brands.  I see the Axis brand listed when I go to add a new remote device but want to make sure that it works well before suggesting that we swap out their NVR with this model.  I'm also wondering about the IQinVision brand cameras and if it will work with them.  Any advice on how to connect these brands would be great.  Thanks.