CVDS, Inc is the manufacturer of ComLog digital voice logging recorders for air traffic control, military and marine traffic control, public utilities, emergency service centers, call centers, and public safety applications. Our recorders can record 4 to 250 channels available in 4 chassis sizes, combine analog and digital channels on the same card, playback in less than 0.5 seconds, are connected via LAN/WAN by single or multiple workstations, calls date and time stamped, 24/7 tech support.