SecurityMan SVR2001 - Manual (Page 8)

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B. Back panel and the terminals
21. Video input channels (BNC)
22. NTSC/PAL video mode dipswitches
23. Input Output dry contact terminals
24. Fan
25. Power socket
26. Microphone input (RCA)
27. Audio output terminal (RCA)
28. Video composite output terminal (RCA)
29. Super video output terminal (Super Video)