Pinouts of Connectors

Siemens C25, S25, C35, M35, S35, A35, A36, A40, C45, S45, ME45, SL42, SL45, S6, S8, C10, S10, S11, C30, S30, S40 data-cable, flash cable pinout

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9 pin D-SUB MALE connector pin-out & layout
9 pin D-SUB MALE connector  to the computer
RX voltage must be limited to 3V (by stabilitron or by using 3 Volt MAX3232) when using cable for SMS-ing. Mobile phone will loose network signal during the data exchange without this.
You can connect Pin 4 of COM port with IGN pin of mobile phone if you want them to enter test-mode automatically.

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Pinouts.ru > Pinouts and schemes of cellular phones cables >  Pinout of Siemens C25, S25, C35, M35, S35, A35, A36, A40, C45, S45, ME45, SL42, SL45, S6, S8, C10, S10, S11, C30, S30, S40 data-cable, flash cable and layout of 9 pin D-SUB MALE connector

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