Symbian OS 及通讯技术术语全解

核心提示：Content ProviderA company that provides services to mobile phone users or network operators. These services could be shopping, web surfing, chat rooms, playing

Content Provider

A company that provides services to mobile phone users or network operators. These services could be shopping, web surfing, chat rooms, playing games, accessing data such as music and books through a server.

用来向手机用户或网络运营商提供服务的公司。这些服务可以是购物、网络冲浪、聊天室、玩游戏、通过服务器访问数据(如音乐和图书)。

D-AMPS

Digital AMPS (Digital-Advanced Mobile Phone Service) is the digital wireless standard widely used throughout the Americas, Asia Pacific and other areas. D-AMPS uses digital TDMA on the one hand, and is required to be compatible with installed AMPS base station networks on the other. D-AMPS operates on the 800 and 1900 MHz bands.

数字AMPS(数字— 高级手机服务)是广泛用于美国、亚太地区和其他地区的数字无线标准。一方面，D-AMPS 使用数字TDMA，另一方面，D-AMPS 必须与已安装的AMPS基站网络兼容。D-AMPS 使用800 和1900MHz 波段。

DCS 1800

Digital Communications System: another name for GSM working on a radio frequency of 1800 MHz. Also known as GSM1800 or PCN, this digital network operates in Europe and Asia Pacific.

数字通信系统：在1800MHz 无线电频率下工作的GSM 的另一个名称。也称作GSM 1800 或PCN，该数字网络在欧洲和亚太地区使用。

Dual band

Dual band mobile phones can work on networks that operate on different frequency bands. This is useful if you move between areas covered by different networks. Some networks operate on two bands, for instance GSM-1800 in town centers and GSM-900 in the rest of the country.

双频手机可以在不同波段的网络中使用。如果您在由不同网络覆盖的地区之间漫游，则这非常有用。一些网络使用两个波段，例如，GSM-1800 在城市中心使用，而GSM-900 在国家的其余地区使用。

Dual mode

Dual mode mobile phones have more than one air interface and hence can work on more than one network. One example is phones that operate on both digital and analog networks. They are quite useful if you want the advantages of a digital