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Why do not mobile phones have dial tones like mobile phones?

Landline Phone has a feature feature dial tone. Dial tone is an instant sound that shows that phone is ready to call. When the number is dialed, this tone closes. On the contrary, there is no mobile phone dial tone.

Due to this fascinating difference, the electrical engineer involved in the cell phone network founder Philadelphia is the decision he has done since today half a century ago. Portter decided that the mobile phone would not have dial tone, but vice versa will dial the number, and then pressing a button will start the call extensions process.

They described it because of this that network usage will be used for a short period of time and when bitter users use mobile networks simultaneously, not only will their time be children, but also lower pressure on the network. Will be.

The decision of Porter proved so valuable that this method is still being used since 1971, while the basis for SMS and many other technologies also make the same decision.