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How does a call work?
A microchip in the phone modulates (or varies) a radio wave using the electrical signal. The radio wave travels through the air to a nearby cell tower; the tower sends your voice to the person you are calling and the process is reversed so that the person on the other end can hear your voice.
How a call is initiated in mobile phone?
1. When a subscriber initiates a call by dialling a number in his mobile it directly send a request to the BTS which he comes under. 2. After checking all the details the HLR sends a acknowlegement message to the MSC that the caller is O.K. to make a call or not.
How is a voice call connection established between two phones?
A connection is made between your telephone and the other party’s line using several interconnected switches along the way. The phone at the other end rings, and someone answers the call. The connection opens the circuit. You talk for a period of time and then hang up the receiver.
How a call is established?
The mobile of called party receive the paging message sent by the base station and respond by identifying itself over the reverse control Channel. The base station relays acknowledgement sent by the called party and informs the MTSOs about the Handshake i.e. both the call party and called party are available.
Why would someone buy a call option?
Investors often buy calls when they are bullish on a stock or other security because it affords them leverage. Call options help reduce the maximum loss that an investment may incur, unlike stocks, where the entire value of the investment may be lost if the stock price drops to zero.
Are calls bullish or bearish?
Buying calls is a bullish behavior because the buyer only profits if the price of the shares rises. Conversely, selling call options is a bearish behavior, because the seller profits if the shares do not rise.
What happens when call is made?
How cellphone calls travel. When you speak into a cellphone, a tiny microphone in the handset converts the up-and-down sounds of your voice into a corresponding up-and-down pattern of electrical signals. A microchip inside the phone turns these signals into strings of numbers.
What do you know about telephone and how do you make a call?
Make a phone call
- Open your phone’s Phone app .
- Pick who to call: To enter a number, tap Dialpad . To pick a saved contact, tap Contacts .
- Tap Call .
- When you’re done with the call, tap End call . If your call is minimized, drag the call bubble to the bottom right of the screen.
Who received the first public phone call?
Steve Jobs
On January 9, 2007, Steve Jobs took out his iPhone and dialed a Starbucks in San Francisco. “Good morning,” answered the polite voice of employee Ying Hang “Hannah” Zhang. “How may I help you?” “Yes, I’d like to order 4,000 lattes to go, please,” Jobs said, grinning.