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9 pin D-SUB female connector layout
9 pin D-SUB female connector
at the computer
at the cellular phone
Complex GSM box, including MBUS support. Should work with Ericsson, Siemens, Panasonic, Sagem, Sony, Alcatel, Motorola, Nokia, Bosch.

universal mobile cellular cable or data-cable

This scheme is some kind of RS-232 Converter.

Almost all digital devices we use require TTL or CMOS logic levels. Thats why the first step when trying to connect the device to RS-232 port is transformation of RS-232 levels ack into 0 and 5 Volts. This is done by RS-232 Level Converters, like a Max 232.

 
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Pinouts.ru > Nokia, Samsung, Motorola and other mobile phones cables schemes listing > Pinout of GSM all-in-one (MegaAdy GSM unlock box) schematic and layout of 9 pin D-SUB female connector
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