HIKVISION DS7208HVI-ST/SE

5.8. Voice Talkback Module
 Voice talkback module main control chip: TW2866 (US1), PIN 2 through
3.9 K resistance (RS60) + 560Ωresistance (RP24) output Aout
 Voice talkback module part:
(note: voice talkback Line In input and the first road audio input share)
5.9. Power Supply Module
 The power module component：
560
Ω（
RP24
）
TW2866
（
US1
）
3.9K
（
RS60
）