Pinouts >  Mobile Phones and Smartphones connectors  >  Siemens pinouts
full pinout for Siemens A52, A55, A56, A60, A65, AL21, AX75, AX72, C55, C56, C60, C62, C65, C70, C75, CF62, CF75, CFX65, CL75, CT56, CX65, CX70, CX75, CXT65, CXT70, CXV65, CXV70, M55, M65, MC60, M75, MT55, ME75, S55, S56, S57, S65, S75, SL5C, SL55, SL56, SL65, SK65, SF65, SP65, 1168, 2218, SX1. also for Xelibri-1, Xelibri-2, Xelibri-3, Xelibri-4, Xelibri-5, Xelibri-6, Xelibri-7, Xelibri-8
This pinout is associated with 49 compatible devices or models. Show them>
Mobile phone interface pin Siemens x55 and other old Siemens x65, x75, SX1 Description
1 Vin Power Charging Vbus in in SX1, SL65, SF65 and others x65, x75
2 Gnd GND usb GND in x65, x75, SX1 USB cable
3 Tx TX / USB D+ usb D+ in x65, x75, SX1
4 Rx RX / USB D- usb D- in x65, x75, SX1
5 CTS CTS Data Line For Accessory. Used as a cable detect in Siemens x65-x75 models. Short to pin 2 GND to force cable detection.
6 RTS RTS Data Line For Accessory or serial cable
7 DCD DCD Clockline For Accessory
8 Audio P AUDIO L  
10 Audio N AUDIO R  
11 GND Mic GND (EXT MIC.)  
12 EPP EPP 1 (EXT MIC.)  

Pins 5,6,7 should be shorted by 10KOhm resistors to pin 2 in x65, SX1 USB cable.

Source(s) of this and additional information: GSM pinouts,
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