Optiview, DVR, models:

2.28.06/4.37	Remote Client Manual
4 Camera M-JPEG 120fps Triplex Embedded DVR DVRJ4B	Specifications
4CH	User Manual
4CHs	User Manual
4M Series	Client User Manual
Advanced 1080P	User Manual
Advanced 1080P 1U Series	User Manual
DVR4Lite	Manual
DVRJ4	User Manual
DVRJ4A	Specification Sheet
DVRTT PRO Series	Operation Manual
H.264 DVR System	User Manual
HDDVR	Quick Start Up Manual
HDVR161080-Q4	User Manual
VR EM	Quick Start Up Manual
VR Enterprise	User Manual
VR series	Quick Start Manual
VR16HTD1	User Manual