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Confidential / released – Siemens TC35i User Manual

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TC35i Terminal Hardware Interface Description

Confidential / Released


TC35i_T_HD_v01.05 Page

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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.