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All You Need to Know About VOIP

Think you are well versed with the basic concepts of Voice Over Internet Protocol (VOIP)? Take this quiz to test your knowledge of VOIP service!
Bindu swetha Nov 11, 2020
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The Voice over Internet Protocol, VOIP, also referred to Internet telephony, provides for the transmission of voice, fax, SMS and voice messaging services over the Internet, which is an upgrade from the older used public switched telephone network (PSTN).
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Signaling System No.7 is a non-IP based telephony signaling protocol that is used in the public switched telephone network (PSTN).
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In 1973, as a part of the communications experiment, VOIP transmission began for the very first time!
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Vocaltec used the technique of compressing the voice signal and converting it to small data packets to for transmission.
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Bandwidth is saved by using silent data method while making a VOIP call.
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DSP performs various functions such as DAC, ADC, compression, sampling, and other similar functions in real-time.
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VOIP applications provide the streaming of audio and visual files over the internet. Skype and Viber let you make video and audio calls by using your phones, computers and smart TVs while Facetime provides the same features for Apple devices.
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Though some codecs work below the said 90kbps mark, like the iLBC (27.7 kbps) and the G.726-32 (55.2 kbps), the VOIP voice signal at 90 kbps per channel provides good quality transmission!
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Generally, latency is caused by all of the mentioned factors but it is the connection latency that directly effects the VOIP signal transmission causing an echo during a connection.
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All the mentioned factors such as latency, codec support, bandwidth, type of echo cancellation in use, weather conditions are responsible for the voice quality.