Siemens TC35i User Manual download pdf (Page 32)

TC35i Terminal Hardware Interface Description

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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

(balanced)

1.4 1.5 1.7 kOhm

Input level

imax

1.03 V

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

Gain = 0dB @ 3.14 dBm0

no load

audio mode = 5,

outBbcGain = 0,

outCalibrate = 32767

3.3 3.7 4.07 V

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

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.

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