mountains or tall buildings.

2017-02-10 

来源：英文爱情短信 

【www.dgxingshi.com--英文爱情短信】

not surprising,abercrombie france, since much of the carriers" revenue is dependant on features available only on digital networks.

nextel,www.abercrombiemilanoeu.com, sprint and verizon each have cell phones that use the global positioning system (gps) to find a caller"s location. while cingular/at&t and t-mobile rely on a triangulation system.

part of the problem is lack of service. often,www.airjordanpascherdeboutique.com, in more rural areas,air jordan, your cell phone has fewer towers available to receive reception. and, many of those towers are designed for analog calls - not digital.

but, since the fcc does not require it,www.abercrombiefitchruboutique.com, fewer carriers offer analog service -- or the ability to connect to it.

unfortunately,abercrombie, there"s no guarantee that your wireless 911 call will be routed to an emergency call center. much less,polo ralph lauren, that the emergency dispatcher will have the ability to pinpoint your call"s location.

you might want to think again........

there is no uniform ehanced 911 system (e911) for wireless carriers. the fault lies mainly with the fcc, who has once again neglected to force all carriers to conform their systems to a single technology.

because of this,moncler doudoune, there are now two very incompatable e911 systems in the works.

unfortunately, both e911 systems have their flaws. the gps system needs a minimum of three satalites to be able to "read" the handset"s location. accuracy can be hampered by heavy vegetation,air jordan pas cher, mountains or tall buildings.

if you"re one of the millions of cell phone users who count on their wireless phone for emergency 911 calling,abercrombie,

another problem?

the triangulation system also has its shortcomings. the system relies on the strength and timing of

why?

查看更多英文爱情短信相关内容,请点击英文爱情短信