然而，拨号用户可能从来没机会体验其真正的优势，因为在许多情形下，Ajax需要在浏览器与服务器之间大量通信。

However, users on dial-up might never be able to experience its real advantages, because in many cases, Ajax requires a lot of communication between browsers and servers.

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方案中应用了帧中继技术、以太网技术以及VLAN技术等，为拨号用户提供了可靠性高、通信速度快和具有良好扩展能力的接入服务。

In this project, the Frame Relay, Ethernet and VLAN technologies are used, which provide the dialing users with high reliability, speedy communication and great expanding access services.

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DTMF是一种可靠而成熟的通信技术，由于它可以提供更高的拨号速率，迅速取代了传统转盘式电话机使用的拨号脉冲信号。

DTMF is a reliable and mature technology. Because it can provide the higher dialing speed, it has rapidly replaced the dial pulsing signal which the traditional dial telephone used.

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