A-N (Alcatel, ..., NEC) cell phones and Smartphones connectors  > Bosch pinouts
full pinout
PinNameSignal DescriptionDirection
8VINInput voltage - supply pinIN
16C-BUSBi-directional serial control busIN/OUT
7I-BUSData input (internal 100k pullup)IN
15PA_BIAS_ONTrigger signal synchronous withr TX burst
6V-BATTConnected directly to the MS battery
14HF_ENABLEHF enable output
5IGNITIONSensing ignition (in car kit)
13D-BUSData outputOUT
4CHG-IDCharger ID - detects type of charger
12GNDGround-this pin is checked by HF
3A-ULAnalog input to phone
11AGNDAnalog ground
2A-DLAnalog output from phone
10AGNDAnalog ground
1EQUIP-IDPulled low by HF, internal pullup 100k
9GNDGround
According to 1 reports in our database (1 positive and 0 negative) this pinout should be correct.

Is this pinout
Bosch 509, 5xx-7xx cell phones cable connector visual pinout:
Bosch 509, 5xx-7xx cell phones cable connector diagram
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