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Telephone circuits have gone through many technological changes over the years. The current telephone system is as follows:
A device called an electronic switch generates dial tone and is used to interconnect phone calls. It exists in your local phone company's central office. It is similar to a computer and is pretty hi-tech. The phone line has two sides, + and -, and leaves the switch, being routed through the central office and headed for outside. Before it leaves the office though, it is connected to a 48 V battery and puts some electricity on the line. It then leaves the central office through the cable vault and travels underground some distance until it reaches near your home. At various locations, the phone lines then come above ground and is what you're probably used to seeing attached to telephone poles. The phone wires travel along the telephone poles, or sometimes buried in certain areas, and eventually are distributed to your home. Finally, the wires are spread out to all of your "phone jacks" in which each of your phones are connected to.
The extraordinary part is that a typical phone line may contain between 20,000 to 40,000 feet of copper wire! So when your phone goes out, don't give your repairman such a hard time, and realize how much there is to analyze when fixing the line.
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An old telephone man
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∙ 16y ago
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Broad cast telephone hybrid circuit diagram?
yes circuit diagram
Where is the circuit-switched network used?
The first circuit-switched network was the telephone system.
What type of switching is used with telephone transmissions?
circuit switching.
What occurs when tip and ring of a telephone circuit are inversely installed?
I have no idea
What is an off hook circuit?
It is terminology used in the telephone industry in regards to when a telephone circuit is activated when the handset has been lifted from the cradle or off hook. Off hook comes from when telephones had separate receivers that you put to your ear to listen. It was hung on a hook device on the side of the telephone. The mouth piece was fixed stationary on the front face of the telephone and the whole telephone was mounted on the wall.
What is the designation for a digital telephone circuit that transmits voice or data at 1.544Mbps?
T-1
The combination of telephone lines and the closed switches that connect them to each other is called?
Circuit
What can be found in telephone?
The basic parts of telephone set would include keypads/dial,handset, hook switch, circuit board and phone kit.
Can you please assist with the circuit diagram of a telephone line simulator that uses SOS telephones and you have to test this SOS telephone without calling the nearest exchange?
Yes.
What happens when you replace a wire in a circuit with a piece of string?
Well, you have almost invented the string can telephone!! Keep at it..second answer since ordinary string is not a conductor, you no longer have a circuit. Remember a circuit is a continuous path.
Which signaling method carries tones in the same voice frequency and circuit of a telephone call?
in-band signaling
Can you tell you intenal circuit of mobile telephone?
yes i can it is very difficult and find some one that knows to answer it
