Data line, English: data access, its function is to connect mobile devices and computers to achieve the purpose of data access.
Generally speaking, it is a channel for mobile phones to transmit files such as Bell pictures.
Nowadays, with the rapid development of mobile phone functions, data lines have become an indispensable part of our lives.
Data line classification
From the interface: COM interface and USB interface.
1, COM interface, also known as serial port, is connected behind the desktop computer and is being eliminated at present. The advantage is that the price is low and it supports brushing (some mobile phones can only use serial port to brush); The disadvantage is that it is extremely inconvenient to disassemble and assemble, does not support notebook computers, and the transmission speed is slow.
2.USB interface is the mainstream at present. Its advantages are convenience, quickness and stability, and it supports all types of computers. The disadvantage is that the price of IC is slightly higher, and some data lines do not support the brush function.
Classification of USB interface data cable: without IC; With IC; Special chip.
1, without IC: there is no central control chip, and a mobile phone computer must be plugged in to identify the line, which is cheap.
Typical models: Samsung CDMA series and D500 series; Motorola E398 series, V3 series; Nokia dku-2; NEC N720 series; Siemens 65 series and so on.
2. With IC: with central control chip, the models of ordinary chips are 2303, 2 10 1 3 1 16, and the computer can identify the line without plugging in the mobile phone. Since the price of an IC is more than 10 yuan, it is more expensive than that without an IC. The working principle of data line with chip is USB to COM, which converts USB interface into serial port and displays it on computer.
Typical models: Samsung E638 series, D4 18 series; NEC N6 10 series; Siemens 25 series and 55 series; Sony Ericsson mobile phone data cable; Panasonic mobile phone data cable; Lenovo mobile phone data cable and so on.
3. Special chips: non-ordinary popular chips, such as DKU-5, CA-42, DCU- 1 1, etc.
Note: Don't think that the quality with IC is good, and the quality without IC is poor. In fact, whether there is IC or not is produced according to the applicable model of mobile phone.
Classification from manufacturers: original factory; Domestic brands; There is no license in China.
1, original factory: directly produced by mobile phone manufacturers, or providing materials to a manufacturer for OEM, marked with the brand of mobile phone, with the best quality and the most expensive price.
2. Domestic brand: The data cable has its own brand, and the address and telephone number of the manufacturer are printed on the package, which is more formal, with good quality and low price, such as Ling Kai data cable. There are not many such data lines, and domestic data lines are generally unlicensed.
3. Unlicensed: there is no logo of the manufacturer and brand. This kind of data line is divided into two categories. The first is the data line of professional export. Foreigners don't need to put up the brand of China. The quality of this line is very good, the price is lower than that of domestic brand lines, and the cost performance is the highest; The second is the miscellaneous brand line. The price is very low and the quality is very poor. Be careful when buying. Please choose a reputable seller to buy.
Classification by function: surfing the Internet; Brush the line; Synchronization line; Charging line; Multifunctional line.
1, internet cable: it can only be used for GPRS or CDMA 1X internet access. Typical model: V730 series; V688 series; PHS series.
2. Brush line: It can only be used to upgrade the brush machine. Typical model: BenQ S700；; Upgrade to unlock the first line.
3. Synchronization line: used to transmit the phone book; Picture ringtone; SMS; Multimedia data, etc. Of course, some are bidirectional transmission, and some only support unidirectional transmission. This kind of data line is very common.
4. Charging cable: generally, it is more practical and convenient to add a USB charging function to the network cable or synchronous cable, which is an essential function for surfing the Internet and sending short messages in groups. It can also be subdivided into two types: charging and charging switch. The former charges as soon as it is plugged in, and the latter has a small switch to control whether to charge. Of course, the grade with charging switch is the highest and the price is more expensive. Recommended type: CDMA Internet series; Siemens 3508 series.
5. Multifunctional line: It supports two or more functions such as surfing the Internet, synchronizing, brushing and charging at the same time. The newly listed Samsung cable is also equipped with dual interfaces, using USB to access the Internet synchronously; Serial brush machine