Confidential / released – Siemens TC35i User Manual
Page 32
TC35i Terminal Hardware Interface Description
Confidential / Released
TC35i_T_HD_v01.05 Page
32/37
10.07.2003
Table 14: Characteristics (requirements) audio interface
Parameter
Min.
Typ.
Max.
Unit
DC (no load) at MICP
5.6
5.9
6.2
V
DC at MICP
in POWER DOWN
0
V
DC (no load) at MICN
0
V
DC Resistance differential
MICN, MICP (balanced)
9.3
9.4
9.5
kOhm
Impedance
Z
i
(balanced)
1.4
1.5
1.7
kOhm
Input level
U
imax
1.03
V
PP
Gain range
6 dB steps
0
42
dB
Microphone
MICP, MICN
Frequency Range
300
3400
Hz
fine scaling by DSP (inCalibrate)
-∞
0
dB
Impedance (audio not active)
30
kOhm
Impedance
(balanced)
15
Ohm
AC output level U
O
Gain = 0dB @ 3.14 dBm0
no load
audio mode = 5,
outBbcGain = 0,
outCalibrate = 32767
3.3
3.7
4.07
V
PP
Gain range
-18
0
dB
Gain accuracy
0.8
dB
Frequency area
300
3400
Hz
DC Offset
(balanced)
100
mV
Attenuation distortion
for 300...3900Hz
1
dB
Earpiece
EPP, EPN
Out-of-band discrimination
60
dB
LE
Audio
Length of Audio (Handset) cable
3
m
Unless otherwise stated, all specified values are valid for gain setting (gs) 0dB and 1kHz test
signal.
gs = 0dB means audio mode = 5 for EPP to EPN, inBbcGain= 0, inCalibrate = 32767,
outBbcGain = 0, OutCalibrate = 16384, sideTone = 0.