《中英文翻译__GSM与应用_精品》由会员分享，可在线阅读，更多相关《中英文翻译__GSM与应用_精品（6页珍藏版）》请在金锄头文库上搜索。
1、.word格式.Gsm and ApplicationGSM is Global System for Mobile Communications acronym, which means Global System for Mobile Communications is the worlds leading cellular systems in the world. GSM is based on narrowband TDMA standard that allows radio frequency in a group call at the same time 8. GSM80 d
2、uring the rise in Europe, put into use in 1991. The end of 1997, has operations in more than 100 countries, Europe and Asia has become the standard in fact, that by 2001, the worlds 162 countries have already built a 400 GSM communications network. But the GSM system capacity is limited, users in th
3、e network overload, it had to construct additional network facilities. What is gratifying is that GSM performance in other areas, which in addition to providing a standardized list and signaling systems, but also opened up some of the more intelligent of the business such as international roaming an
4、d so on. The convenience of GSM mobile phone is that it provides a smart card, known as SIM cards, and card could be separated, so that the replacement of mobile phone users and custom personal information in this area are facilitated. GSM network to improve after years of development, is now very m
5、ature, less blind spots, signal stability, automatic roaming, and the communication distance from the impact of the surrounding environment. GSM short message in particular, flexible and convenient, you can cross-market, inter-provincial and even cross-border transmission, and each send a short mess
6、age as long as one dime, very reliable and affordable. In addition, the mobile phone SIM card in recent years can apply for 0, some packages use lower cost than fixed. Therefore the use of mobile phone message to achieve alarm, ultra long-range remote control for industrial equipment, transmission o
7、f data is a very good choice. GSM module, is a similar mobile communication module, integrates a number of mobile phone functions on a single small circuit board, it can send SMS messages, calls and so on, the module is small, but it has a lot of mobile phone functionality, with its have equal is th
8、e core of the mobile phone, and it is in a lot of applications have a wide range of applications, GSM module through the use of AT commands to control it, modules can be connected to computer RS232 serial port, can also be used to carry out single-chip control . Below we cite some typical applicatio
9、ns:1, mobile phone access control system: GSM Access Control System used to control the electric lock control, if you need to enter, as long as the cell phone call using GSM modules mobile number, will automatically open the door, and only you can set up cell phone numbers to open the door, and no c
10、osts. 2, three billboard over the weather disaster emergency turn off: Over three billboards are constantly flip through the motor to achieve a number of ads displayed, because installed in the outdoors, when there is wind, hail and other weather disasters, billboards could easily be blown bad or da
11、maged card die, when in need of emergency shut down, You can normally closed relay contact to control the power of advertising, when you need to do is send turn off control message, the billboard will automatically turn off, and automatically after a certain time delay automatically return to normal
12、 job (generally disastrous weather will not continue for a long time) in advance if you want to open a billboard, you can send Open control message. 3, engineering system balance reminders: Some works are safe after the completion of the normal operation after a period of time to settle the balance,
13、 if the encounter malicious clients the outstanding purchase price, often installed side very headache, because equipment has been installed, if the loss of a great come back down, particularly in the field customer very costly when the client system can be installed in the GSM module, use it all th
14、e way to control system or the way some of the key points, when the customer paid in arrears when the malicious message can turn off some features, forcing customers to pay the purchase price then immediately open message, if you have a smooth recovery of the purchase price can also be the name of s
15、ystem maintenance by the GSM module removed from the client system. 4, monitoring systems or Web servers and reset the alarm: Monitoring system or web server running after a long period after death may be wrong, this time to power on reset is the only solution at this time through the GSM module can
16、 control system power, and set to open automatically after 3 seconds turn off mode, can achieve power reduction, in addition, GSM module in some special application areas also played a very large role, such as: the disappearance of the main power supply, memory errors, fan shutdown, fuel depletion, it was the invasion and other information, are not people the ideal choice for monitoring the engine room. 5, the remote control of home ap
