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The frequency range of a Public Switched Telephone Network (PSTN) telephone line is 425Hz - 1633Hz. This range is broken up into the dual-tone multi-frequency (DTMF) tones with which we are most familiar. The actual voltage used in most American phone lines is 48V. Part 68 of the U.S. FCC telecommunications regulation provides guidance and restrictions on the Terminal Devices which may be connected to a PSTN.
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoIt is a dial tone ( like Morse Code) and functions as the carrier wave for the phone call, once ( dialed up) the message traffic rides on the carrier. ( not necessarily Flat on top- pun intended with aircraft Carrier. Some house intercoms do not have dial tones- so to speak, and are called CS- for Carrier Suppressed, just pick up and use. I prefer the dial tone as you know the system is (up). pick up receiver, get dial tone, dial!
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Depends on where you are- I assume you mean the audio frequency- in the US, it is an A440, in most of Europe, it is 425 Hz. some older systems have different frequencies, some as low as 30-60 hz.
Wiki User
∙ 16y agoRinging current is approximately 100 volts AC at 20 Hertz.
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What is Transmission Line Frequency Response?
A specialized cable that is designed to carry alternating current of radio frequency is known as a transmission line frequency.The Transmission line frequency response in connecting radio transmitters and receivers with their antennas, distributing cable television signals,trunklines routing calls between telephone switching centers, computer network connections, and high speed computer data buses.
What is a easy way to extend a telephone line?
You can use an in-line coupler to extend a telephone line.
Why a lamp cannot run with the telephone line voltage?
A lamp can be run by power from a telephone line.
What is A telephone line that carries digital data from end to end and can be leased from the telephone company f?
DSL (Digital Subscriber Line) A telephone line that carries digital data fromend to end, and can be leased from the telephone company
Why a pair of modems is required to transmit the digital signals over a long telephone wire Why not a single modem?
first modem will be modulating electrical signals in the voice frequency range of a telephone channel. These signals can be transmitted over telephone line and demodulated by another modem at the receiver side to recover the digital data.
Is the British Telephone line accessible from America?
No the British Telephone line is not accessible from America. In order for it to work in America it has to be a 1 800 number. The British Telephone line is not a 1 800 number.
Is telephone the opposite of mobile?
No Not really sure what you are looking for in an answer but: A mobile telephone is a telephone, your Telephone connected to a land line is also a Telephone.
What is a Non-transient line frequency?
A line or phase having stable frequency and not creating any transients when ON/OFF
Where was the first transcontinental telephone line finished?
The first transcontinental telephone line was joined at Wendover, Utah, in 1915
When was First long-distance telephone line created?
First long-distance telephone line was created in 1877.
What is the difference between a one line and a two line telephone?
a one line telephone means 1 person can talk at a time and a 2 line telephone means 2 separate people can talk at the same time in the same house
What is the device that allows you to talk to people over a telephone line?
a telephone
