Siemens TC35 User Manual page 18

Signal PIN I/O Description
name
MICN 1 DC:O Microphone input
AC:I minus
MICP 4 DC:O Microphone input
AC:I plus
EPN 2 O Earpiece
connector
EPP 3 O Earpiece
connector
16
Interface description
Handset connector
3
2
1 4
Purpose of the connectors/connections
Parameters
DC (no load):
AC: U
Gain range:0...42dB
U
0max
R = 1 5
i
Gain range:–18...0dB
1 MICN
2 EPN
3 EPP
4 MICP
U = 6 . 0 V ± 1 0 %
0
(MICP)
U =0V (MICN)
0
R = 4.7k (MICP)
i
R = 4.7k (MICN)
i
= 1.03V
imax PP
Z = 2 k
i
= 3 . 7 V , no load
PP