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Telecom Network for Professionals and Users
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Waiting for DialtoneViews: 513
Jun 10, 2007 3:10 pmWaiting for Dialtone#

Samir Gupta
There are two kinds of people in this world who uses mobile phone and those who don’t. This was true a till few years back. But thanks to Reliance which gave mobile phones to its customers at just throw away prices. Then it was the turn of TATA which gave incoming free for 2 years. That also increased the mobile users in India. Then after that it was the turn of BIG DADDY.. AIRTEL. From Airtel, reply to this was LIFE TIME FREE INCOMING. And the story goes and goes…

Now India is having more mobile subscribers as compare to the landline phones. Mostly we talk to our friends and clients on mobile phone. Always we will see a man either playing something of his phone or mostly talking on the phone. But …….. have you ever thought that somebody has stolen dial tone from our mobile phones. Earlier there used to be the dial tones in the mobile phone. Now nothing is there…

But I had a mobile phone that had a dial tone. But only if you pressed 'Talk' before you typed in a phone number. Jokes Apart..

Lets come to the point… When automated telephone systems (I mean Land line phones) were first deployed, telephone companies noticed that customers were often confused by the apparent lack of response and used to often assume that their phone is not working. To avoid this, exchange systems started playing some buzzing sound into the line which was always telling to their customers that their phone is working.

When we talk about the mobile phones, they have a screen to display and we call always check whether signals are coming to he mobile phone or not.

This was a simple answer in a layman’s language. But when we talk in technical terms we can say that out PSTN (landline) phones have a negative voltage of -44 Volts which always remains connected to the exchange. Also to make a call with mobile phone, we first enter the number, press the talk button which sends the signals to the nearest connected cell site which further connects the call. But in normal landline phoe, we just pickup the receiver and dial the number.

Cheers!!
Samir Gupta

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