Push To Talk in mobile phones

Push To Talk in mobile phones

We are using our mobile phones as two way communication device. But we can also use it as one way communication device like walkie talkie. How???
How many of you know PTT button in your mobile phone???
The above mentioned one way communication is possible by means of PTT button in mobile phones.
PTT is known as Push-To-talk (or) Press-To-Transmit.
It is used for one way communication.
It is a kind of half duplex communication; only one user can talk at a time.
The button is used to switch the device from voice transmission mode to voice reception mode.
Using this PTT button we can communicate with any device (that device should also have PTT service) regardless of time.

How to use this service?

Press and hold the PTT button for few seconds and then release it.
If you release the button, an operator will ask for the number of the user you wish to dial.
Then the connection will be established between the desired devices.