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  2. Packet delay variation - Wikipedia

    en.wikipedia.org/wiki/Packet_delay_variation

    Instantaneous packet delay variation is the difference between successive packets—here RFC 3393 does specify the selection criteria—and this is usually what is loosely termed "jitter", although jitter is also sometimes the term used for the variance of the packet delay. As an example, say packets are transmitted every 20 ms.

  3. Quality of service - Wikipedia

    en.wikipedia.org/wiki/Quality_of_service

    Commercial VoIP services are often competitive with traditional telephone service in terms of call quality even without QoS mechanisms in use on the user's connection to their ISP and the VoIP provider's connection to a different ISP. Under high load conditions, however, VoIP may degrade to cell-phone quality or worse.

  4. List of SIP response codes - Wikipedia

    en.wikipedia.org/wiki/List_of_SIP_response_codes

    488 Not Acceptable Here Some aspect of the session description or the Request-URI is not acceptable. [1]: §21.4.26 489 Bad Event The server did not understand an event package specified in an Event header field. [4]: §7.3.2 [6]: §8.3.2 491 Request Pending Server has some pending request from the same dialog. [1]: §21.4.27

  5. IDT Introduces World's Lowest Jitter Synchronous Ethernet ...

    www.aol.com/2013/06/27/idt-introduces-worlds...

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  6. Voice over IP - Wikipedia

    en.wikipedia.org/wiki/Voice_over_IP

    The VoIP E911 emergency-calling system associates a physical address with the calling party's telephone number. All VoIP providers that provide access to the public switched telephone network are required to implement E911, a service for which the subscriber may be charged. "VoIP providers may not allow customers to opt-out of 911 service."

  7. List of countries by Internet connection speeds - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    This is a sortable list of broadband internet connection speed by country, ranked by Speedtest.net data for March 2024, [1] and with M-Lab data for June 2023 [2]

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