SIGMA BENEFON TDP-52-SN3 - Manual (Page 179)

27.1.1999
Xo0236e4_fm5.fm 18
Product: DB-40 (Branching Unit) / YO0236
9.2.2.3 Connector PC Signals
9.2.3 Operation
Audio routes for either an external handset or a line converter are selected
using audio switches I201 (mic) and I202 (erp). The operation is controlled by
the HOOK data coming from the XHSERP line. OFF HOOK audio signals have
been routed to connector HS, and ON HOOK audio signals to connector PC.
Voltage regulation is done by components R205, C207 and D201.
1 and 2 V-CHARGE Battery charging voltage 2 A in
3 9V Operation voltage for accessories 0.5 A out
5 PCMIC
Ext audio from microphone1 kHz / 400
mVrms
6 and 7 GND Ground
8 PCERP
Ext audio for loudspeaker amplifier 1 kHz /
200 mVrms
10 I2CINT I2c interruption, input to radio 0/5 V
11 SCL I2c clock 0/5 V
12 SDA I2c data 0/5 V
13 TXD Rs232 0/5 V out
14 RXD Rs232 0/5 V in
16 CHCGONT
Voltage for controlling charger current 0...5
VDC analog