The high price of the original data line is prohibitive for many users. This paper analyzes and analyzes the Siemens, Samsung, Alcatel, Lenovo and other types of data lines, and analyzes their working principles, the results show that the current market data lines, are basically the same, the only difference is the shape and definition of the interface. Many models of data line can be customized, only need to modify according to the actual model of data line.
First, let's look at the computer that defines the RS232C port:
Carrier detection (DCD)
② Data reception (RXD)
③ Send data (TXD)
④ Data terminal ready (DTR)
⑤ SG signal ground wire
⑥ Data preparation (DSR)
⑦ Request transfer (RTS)
⑧ Clear transfer (CTS)
⑨ Ringtone Notification (RI)
Its signal is EIA grade (-3~-15 V,+3~+15 V). As for a phone like the Siemens 6688, you need more ports.
(1) The grounding of the negative electrode of the charging device and the grounding of the data line.
(2) Left channel of the headset
③ Charging electrode
④ Wireless, do not connect with other legs
⑤ Data output
⑥ Data input
⑦ there is no
The function of feet is the same. Switch on (a switch that connects one to the ground and the other to the headset)
⑨ usually refers to MIC land
⑩ MIC positive electrode
(ii) Right aisle
Put on your headphones. Its signal is 0~ 3.3V CMOS/TTL. Due to the different electrical properties of computer serial and mobile phone data port (TTL), signal transformation is needed to realize the communication between them.
