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Telephone - Wikipedia
https://en.wikipedia.org/wiki/Telephone
A telephone is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly. A telephone converts sound, typically and most efficiently the human voice, into …
VoIP vs. Landline vs. Cellular Phone Service | Ooma
https://www.ooma.com/blog/what-are-the-pros-and-cons-of-voip-landline-and-cellular-phone-service/
The only hardware that’s needed is a handset, which can be either corded or cordless. In both cases, audio is transmitted through the phone jack on your wall and into the phone cables outside. Increasingly, households are cutting the cord on their hard-wired home phone service in favor of calling technology that’s more flexible.
Telephony - Wikipedia
https://en.wikipedia.org/wiki/Telephony
Telephony is the field of technology involving the development, application, and deployment of telecommunication services for the purpose of electronic transmission of voice, fax, or data, between distant parties. The history of telephony is intimately linked to the invention and development of the telephone. Telephony is commonly referred to as the construction or …
VoIP Phone Service - Business Phone Systems, VoIP ...
https://www.mitel.com/articles/voip-phone-service-what-is-it-and-how-did-it-change-the-way-we-communicate
VoIP service takes the analog audio signal and turns it into a digital signal transmitted over the Internet. This means you get phone service over the Internet instead of through traditional hard lines powered by a phone company.
Telephone interfacing circuits - Audio | Video | Circuits
https://www.epanorama.net/circuits/teleinterface.html
The source for audio signal which is transmitted to the telephone line should be low impedance to ensure that the impedance matching to telephone line is correct. For receiving audio a differential amplifier must be used to separate the incoming signal form outgoing signal, but differential amplifier is very easy to implement using operational amplifiers.
Medicare "Audio-Only" Telehealth Services
https://codingintel.com/medicare-audio-only-telehealth-services/
This long list of service includes the psychiatric diagnostic interview, individual, family and group psychotherapy, psychotherapy for patients in crisis and the add-on code for interactive complexity. For Medicare patients, these services may now be provided with audio only phone calls. You can watch a short video about this here.
The History of VoIP and Internet Telephony (1928 …
https://getvoip.com/blog/2014/01/27/history-of-voip-and-internet-telephones/
1973: First Voice Data Packet Transmitted. ( Image Source) In 1973, Bob McAuley, Ed Hofstetter, and Charlie Radar developed the first voice packet over ARPANET at MIT’s Lincoln Lab. This voice transmission was possible thanks to LPC, or Linear Predictive Coding — the foundation of modern VoIP technology.
Analog vs. Digital Phone Services Comparison by Verizon …
https://www.verizon.com/info/analog-vs-digital-phone/
Analog phones, which convert your voice to electrical signals that are carried across copper telephone wires, are susceptible to electrical interference, "crossed lines", and poor sound quality. High-speed, broadband internet connections and fiber optic technologies have changed all of that. Enter: Fios Digital Voice.
What is POTS? Plain Old Telephone Service Line & …
https://www.nextiva.com/blog/what-is-pots.html
But voice as we speak it cannot transmit through the POTS line. The sound waves from a caller’s voice need to be converted into electrical signals in order to flow through the network. This is falls on the telephone handset on both the caller’s and receiver’s ends.
How Telephones Work | HowStuffWorks
https://electronics.howstuffworks.com/telephone.htm
A traditional landline telephone system only contains three simple parts: a hook switch, which connects and disconnects the phone from the network; a speaker; and a microphone, through which sound waves from your voice compress and decompress the granules, changing the resistance and modulating the current flowing through the microphone.
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