DVR backing up to NBU Appliance

Hi,

I have a client with a DVR (model - IPD-8/16ZD) that churns out data that I need to send to the NBU appliance. It runs off a linux kernel, file format is H.264.

There's no way to get an agent onto the DVR, and connecting the appliance straight to the DVR doesn't work because it's not a file system NBU recognises.

My questions:

Anyone backing up DVR data to an appliance - how are you doing it?

What DVRs out there are compatible to NBU appliances?

Thanks.