PSTN signaling USES tones generated by the phone to begin or end a call.

PSTN信令通过使用手机产生的声调来开始或结束通话。

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Into the interior, surrounded by light-colored tones, to give people a sense of visual pleasure, oval vanity mirror on the wall, old-fashioned phone, give a "like home" feeling.

进入内部，四周浅色的色调，给人以视觉上的愉悦感，墙壁上椭圆形的梳妆镜、复古式的电话都给人一种“如家”的感觉。

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We have two mobile phone ring tones are the song, no matter who is who to call, can be heard.

我们两个人的手机彩铃都是这首歌，不管谁给谁打电话，都能听到。

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His big break came at the age of 24 when he earned his first million dollars by selling Hip-hop ring-tones to mobile phone subscribers in the United Kingdom.

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They can also assign different 12 different ring tones, and a "Fireworks" button causes the phone to strobe colorfully for 30 seconds.

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Many mobile phone users set specific tones to specific people so that the tones act as audible caller IDs.

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