... LH60- 30v matrix is economical, , samll-sized of matrix switcher System for CCTV surveillance systems. LH60- 30v matrix is economical, , samll- ... sized of matrix switcher System for CCTV surveillance systems. The LH60-30 system is capable of controlling a maximum of ... road alarm input, 1 road alarm output, 32 road group switching, synchronous group switch, . 72 preset view, 18 alarm mode. ...