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but pronunciation in full words, voice over Internet Protocol, or voice over IP, is sometimes used.

Voice over IP has been implemented in various ways using both proprietary protocols and protocols based on open standards.

It is a best-effort network without fundamental Quality of Service (Qo S) guarantees.

Voice, and all other data, travels in packets over IP networks with fixed maximum capacity.

They transport media streams using special media delivery protocols that encode audio and video with audio codecs, and video codecs.

Various codecs exist that optimize the media stream based on application requirements and network bandwidth; some implementations rely on narrowband and compressed speech, while others support high-fidelity stereo codecs.

Voice over Internet Protocol (also voice over IP, Vo IP or IP telephony) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet.

The terms Internet telephony, broadband telephony, and broadband phone service specifically refer to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).

Many offer unlimited domestic calling and sometimes international calls for a flat monthly subscription fee.In addition to Vo IP phones, Vo IP is also available on many personal computers and other Internet access devices.Calls and SMS text messages may be sent over mobile data or Wi-Fi.Vo IP switches may run on commodity hardware, such as personal computers.Rather than closed architectures, these devices rely on standard interfaces.

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    The first was of the Hyksos of the mid 16th century and then another in the Ramesside era.