First, the classification of data lines:

 

From the interface to divide: COM interface and USB interface

 

1, COM interface is also called serial port, is connected behind the desktop computer, is currently being eliminated. The advantage is that the price is low, and the brush machine is supported (some mobile phones can only use the serial cable to brush the machine); the disadvantage is that the removal is extremely inconvenient, does not support the notebook computer, and the transmission speed is relatively slow.

 

2, USB interface is the current mainstream, the advantages are convenient and fast and stable, support all types of computers; the disadvantage is that the price of the IC is slightly higher, and some of the data lines do not support the brush function.

 

USB interface data line classification: without IC; with IC; special chip

 

1, without IC: no central control chip, you must plug in the mobile phone computer to recognize the line, the price is cheap.

 

Typical models: Samsung CDMA series, D500 series; Motorola E398 series, V3 series; Nokia DKU-2; NEC N720 series; Siemens 65 series and so on.

 

2, with IC: with a central control chip, the average chip model is 2303, 2101, 3116, will not recognize the line without plugging in the mobile phone computer, because the price of an IC is more than 10 yuan, so the price is more expensive than without IC. The working principle of the data line with chip is USB to COM, which converts the USB interface into a serial port and displays it on the computer.

 

Typical models: Samsung E638 series, D418 series; NEC N610 series; Siemens 25 series, 55 series; Sony Ericsson mobile phone data cable; Panasonic mobile phone data cable; Lenovo mobile phone data cable and so on.

 

3, special chip: non-common popular chip, special special model chip such as: DKU-5, CA-42, DCU