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The fixed position research of cell [url=http://www.riad-marrakesh.fr]www.riad-marrakesh.fr[/url] phone fire alarm In recent years, with the rapid development of wireless [url=http://www.davidhabchy.com]barbour sale[/url] communications, cell phones have a wide range of development, and its popularity are also constantly in Tigao degree, cell phones from their use of the Fang Bian Xing, Bushouchangde the Xian Zhi Shi Jian and other factors, has Chengwei people's lives indispensable communication tool. I discovered through research, at present, people report the fire by cell phone percentage is increasing The fixed position research of cell phone fire alarm
In recent years, with the rapid development of wireless communications, cell phones have a wide range of development, and its popularity are also constantly in Tigao degree, cell phones from their use of the Fang Bian Xing, Bushouchangde the Xian Zhi Shi Jian and other factors, has Chengwei people's lives indispensable communication [url=http://www.sandvikfw.net/shopuk.php]hollister outlet sale[/url] tool. I discovered through research, at present, people report the fire by cell phone percentage is increasing year-by-year trend, in some places, more than the number of fixed telephone alarm. Examine the use of cell phone alarm; it appears that the proper positioning is necessary.from: Cell phone accessories wholesale
When the command center received the fire alarm, following three fields through access to accurate location information to achieve the location of the fire, the use of fixed telephone alarm for easier access to the three fields [url=http://www.corsodiesperanto.it/peuterey.php]peuterey outlet[/url] of information. However, the use of cell phone alarm, because the cell phone has features at any time, causing alarm processing software difficult to achieve accurate positioning, mainly by Alarm staff direct questions to get the fire place, a certain sense, by asking to get the location of the fire after all, a positioning means fire, but there are two inadequate this approach, first asking way to get the fire alarm position by the tension of people, language skills, understanding of the fire place such constraints, delay mobilization of forces deployed in time; second, if the alarm a passerby who yes, right disaster site not very understanding, which will also bungled a combat; and for cross Quyuzuozhan the Budui, the general circumstances in the print out of the bus trip Shan Shang car road map, to guide units to reach the scene quickly, but the [url=http://www.par5club.com/louboutin.php]louboutin pas cher[/url] use of cell phone alarm, unable to achieve rapid and accurate positioning, resulting in a single squadron out of the bus can not print out the route map, can only be achieved by asking passers-by arrived at the scene, which will miss the benefit The fighter, not conducive to fire fighting. These two points are not conducive to the realization of automation command. Therefore, as communications technology and wireless positioning technologies enable the rapid development of mobile police locate possible solution to this problem in improving [url=http://www.anepf.fr]doudoune moncler pas cher[/url] the efficiency of organizational command fire forces, [url=http://www.thehygienerevolution.com/hollister.php]hollister france[/url] reducing the maximum loss of life and property of great significance. Wire signal cable telephone caller and the call in a fixed location per capita transmit a traditional telephone cell phone communication theory. The mobile communication process [url=http://www.par5club.com/louboutin.php]louboutin[/url] is: use the cell phone to signal transformed into the language of signal transmission to the mobile communication network base stations, base station by the representative of the language of the electrical signal into the electromagnetic spectrum, from the ground by a high degree of communications for the 3600km satellite radiation roaming sent to recipient's telecommunication network, the recipient's communication device receives the radio waves into the language signals. As shown below, we can hand-held cell phones, and wherever, can the city telephone network and all users of the system to talk to cell phone users. Talk between them is the launch base station through [url=http://www.dearilievi.it]moncler outlet[/url] the system [url=http://www.skoda-witzke.de/woolrichoutlet.php]woolrich online shop[/url] and receive electromagnetic waves to achieve. From the above we can see the process of cell phone communications, cell phone communications is an open electronic communications system, as long as the appropriate receiving equipment can intercept any time, any place, any call information, but also to achieve accurate positioning. Telephone switch telephone base station.
At present, the cell phone standard includes GSM, [url=http://www.villazuki.it]woolrich outlet online[/url] CDMA, 3G three, since [url=http://www.tagverts.com/barbour.php]www.tagverts.com/barbour.php[/url] the advent of cell phones has gone through a first-generation analogue cell phones (1G), second-generation GSM, TDMA and other digital mobile (2G), 2.5G mobile communication technology CDMA and third generation mobile communication technology 3G. From:china cell phone wholesale cell phones
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