Siemens TC35 - Manual (Page 18)

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 1 DC:O
AC:I Microphone input
minus DC (no load):
U
0
= 6 . 0 V ± 1 0 %
(MICP)
U
0
=0V (MICN)
R
i
= 4.7k (MICP)
R
i
= 4.7k (MICN)
AC: U
imax
= 1.03V
PP
Z
i
= 2 k
Ω
Gain range:0...42dB
MICP 4 DC:O
AC:I Microphone input
plus
EPN 2 O Earpiece
connector U
0max
= 3 . 7 V
PP
, no load
R
i
= 1 5
Ω
Gain range:–18...0dB
EPP 3 O Earpiece
connector