Calling a registered frequency when the Automatic frequency Selection function is not used. This example calls a frequency channel 01.

不使用自动频率选择功能时，调出已登记的频率。该例调出01频道的频率。

youdao

Calling a registered frequency when the Automatic frequency Selection function is not used.

不使用自动频率选择功能时，调出已登记的频率。

youdao

In order to improve the ringing method of telephone used in power systems, a type of selective calling device using audio frequency has been developed.

为了使电力系统通信设备的呼叫装置更加使用方便工作可靠，我们研制了以按键电话机发出双音频呼叫信号进行选择接收的音频选号装置。

youdao

It developed Blast, which will soon let wireless carriers provide video or handle a twentyfold increase in calling traffic over a single frequency.

FORBES: Lucent's Labs

For a more enjoyable calling experience it also uses age-specific frequency adjustment and real-time speech slowing to help make calls crystal clear.

CNN: The mobile device that thinks it's a Russian doll

The numbers change as we get older, with the overall frequency of all communication declining, but even in the 65 and over group, daily texting still edges calling 4.7 to 3.8.

CNN: We never talk any more: The problem with text messaging