, Panasonic, Vicon and others. NVR CONTROL SYSTEMS-SIGNET TECHNOLOGIES, INC. represents NICE, CISCO, ONSSI, Pelco, and a variety of other vendors. F.MF.RCRNCY COMMUNICATION EOUIPMENT- Commend, Stentofon and Talk-A-Phone products are our primary vendors for this application, used in conjunction with other CCTV and access control e