GRD Sense - Rear Part

3
1.2 Rear Part
NO. Part name Function
12
Speaker Loud speaker
13
75Ω Switcher
Impedance matching for video signal
14
Video Input /Output
CCTV1 / CCTV2 / CCTV3 / CCTV4 / video out (2 wire in
polarity)
15
DC Power 14.5V DC supply
16
Telephone Interface for the telephone line
17
Connection
Interface
Interface for door station 1/door station 2 /extensions /audio
phone