LH60- 2020R matrix is economical, , samll-sized of matrix switcher System for CCTV surveillance systems. LH60- 2020R matrix is economical, ... , samll-sized of matrix switcher System for CCTV surveillance systems. The LH60-2020 system is ... 96X alarm interface box, could accept the max 1024 alarm port, FTP the alarm pictures, VIDEO, AUDIO, VIA matrix switcher system to ...