If your 4 channel DVR (Model# DVR8504) has version lower than 3.1.3, and you want to see video in your blackberry phone.
Please download below firmware,
Save it in USB flash drive,
plug in your DVR,
Choose update in the DVR menu.
http://cctvdirectbuy.com/download/updat ... 090217.tar
User Manual Link:
http://cctvdirectbuy.com/download/updat ... kberry.pdf