16
Interface description
Handset connector
Purpose of the connectors/connections
2
1
3
4
1 MICN
2 EPN
3 EPP
4 MICP
Signal
name
PIN I/O Description Parameters
MICN 1DC:O
AC:I
Microphone input
minus
DC (no load):
U0=6.0V±10%
(MICP)
U0=0V (MICN)
Ri=4.7k (MICP)
Ri=4.7k (MICN)
AC: Uimax=1.03VPP
Zi=2kΩ
Gain range:0...42dB
MICP 4DC:O
AC:I
Microphone input
plus
EPN 2OEarpiece
connector
U0max=3.7VPP, no load
Ri=15Ω
Gain range:–18...0dB
EPP 3OEarpiece
connector