In mobile telephony, 2.5G protocols extend 2G systems to provide additional features such as packet-switched connection (GPRS) and enhanced data rates (HSCSD, EDGE).

在移动德律风技巧中，2.5G 和谈将2G 系统扩展到供给诸如分组互换连接（GPRS） 的附加效用和更高的数据传输速度（HSCSD、EDGE）。

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In effect, it is like a new connection setup for the switched user.

事实上，这相当于为切换的用户建立了一个新的连接。

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When a trusted connection user is switched, it resets all the connection attributes, including cursor with hold, isolation, bind options, codepage, and so on.

切换可信连接用户时，它重置所有连接属性，包括保留指针、隔离、绑定选项、代码页面等等。

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"By 4 o'clock, I have to charge it, " said Ms. Goldman, who typically keeps her phone's 4G connection switched off.

WSJ: Fast Phones, Dead Batteries

Why did the phone companies cling to expensive switched network standards even as packet-switched voice grew robust enough to deliver acceptable fidelity at a much lower cost per connection?

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