VoIP, short for voice over Internet Protocol, is the group of technologies that carries a voice call as data over an IP network. The term describes how a call travels. It doesn't describe a product, so two services sold as VoIP can have little in common beyond that.
\n","summary":"VoIP, voice over Internet Protocol, is the group of technologies that carries voice calls as data over a network using internet protocols. It describes how a call travels, not a product. It is sold in several forms, including hosted phone systems, SIP trunks and calling inside collaboration apps.","publishedAt":"2026-04-23T03:09:30.888","verifiedAt":"2026-07-17T00:00:00","editorialStatus":"APPROVED","lastReviewedAt":"2026-10-10T04:46:00.923","nextReviewDueAt":"2026-10-17T00:00:00","templateVersion":"v2","aliases":["What does VoIP stand for?","What is Voice over Internet Protocol?","How does VoIP work?","What is VoIP and how does it work?","VoIP meaning","What is internet phone service?","What is a VoIP phone?","Voice over IP explained","What is interconnected VoIP?","Is VoIP the same as a landline?","What is IP telephony?","How is VoIP different from a traditional phone line?"],"confidenceScore":92,"confidenceLabel":"High","canonicalUrl":null},"contributor":{"id":"ec39deab-44fe-48d8-9029-fefe993ab85a","slug":"answer-stack","displayName":"AnswerStack","websiteUrl":null},"contributorOrganizationProfile":null,"contributorPerson":null,"sections":[{"id":"547f7a89-b0ac-46cd-bb18-76fa68d2f708","sectionKey":"what_the_name_covers","sectionType":"markdown_section","heading":"What the name covers","introMarkdown":"The [NIST glossary](https://csrc.nist.gov/glossary/term/voip) defines VoIP as a group of technologies for voice, video and collaboration communications over a data network that uses internet protocols. The definition is broad, and the breadth explains a lot about how the word gets used.\n\nA data network that uses internet protocols is a wider thing than the internet. Internet Protocol is a set of rules for addressing and moving data. The same rules run on an office network and on a private connection between a business and its provider. So a call can be VoIP without touching the public internet, and we cover that in [whether VoIP requires an internet connection](https://www.answerstack.io/q/does-voip-require-an-internet-connection).\n\nThe definition also names no particular standard. The Session Initiation Protocol, or SIP, is one published standard for setting up calls, and a service can be VoIP without using it.\n\nVideo and collaboration sit inside the same definition as voice. That's why the line between a VoIP service and a wider communications package is hard to draw from the label. We compare the two in [the difference between UCaaS and VoIP](https://www.answerstack.io/q/what-is-the-difference-between-ucaas-and-voip).","introHtml":"The NIST glossary defines VoIP as a group of technologies for voice, video and collaboration communications over a data network that uses internet protocols. The definition is broad, and the breadth explains a lot about how the word gets used.
\nA data network that uses internet protocols is a wider thing than the internet. Internet Protocol is a set of rules for addressing and moving data. The same rules run on an office network and on a private connection between a business and its provider. So a call can be VoIP without touching the public internet, and we cover that in whether VoIP requires an internet connection.
\nThe definition also names no particular standard. The Session Initiation Protocol, or SIP, is one published standard for setting up calls, and a service can be VoIP without using it.
\nVideo and collaboration sit inside the same definition as voice. That's why the line between a VoIP service and a wider communications package is hard to draw from the label. We compare the two in the difference between UCaaS and VoIP.
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":10},{"id":"8d911fec-9a8b-4d87-b9a9-da4f98c15f72","sectionKey":"how_a_voice_becomes_data","sectionType":"markdown_section","heading":"How a voice becomes data","introMarkdown":"Suppose you call a colleague from an app on your laptop. The microphone picks up your voice, and the app converts the sound into a stream of numbers. It sends that stream as a series of small packets, each addressed to the other end. Your colleague's device puts the packets back in order and plays them as sound. The same thing happens in the other direction at the same time.\n\nTwo published standards show how the work is divided. The [Real-time Transport Protocol](https://www.rfc-editor.org/rfc/rfc3550.html), or RTP, carries the audio. It gives each packet a sequence number and a timestamp so the receiver can rebuild the order. Its specification also says what RTP leaves to the network underneath. RTP doesn't guarantee that a packet arrives, or that it arrives on time. So the network a call crosses affects how it sounds, along with the devices at each end and the way the audio is encoded.\n\n[SIP](https://www.rfc-editor.org/rfc/rfc3261.html) handles the call around the audio. It locates the other party and negotiates the session, then closes the session when someone hangs up. The setup messages and the audio can travel by different routes.\n\nWe follow a call the whole way in how VoIP works, and from the handset's side in how a VoIP phone works.","introHtml":"Suppose you call a colleague from an app on your laptop. The microphone picks up your voice, and the app converts the sound into a stream of numbers. It sends that stream as a series of small packets, each addressed to the other end. Your colleague's device puts the packets back in order and plays them as sound. The same thing happens in the other direction at the same time.
\nTwo published standards show how the work is divided. The Real-time Transport Protocol, or RTP, carries the audio. It gives each packet a sequence number and a timestamp so the receiver can rebuild the order. Its specification also says what RTP leaves to the network underneath. RTP doesn't guarantee that a packet arrives, or that it arrives on time. So the network a call crosses affects how it sounds, along with the devices at each end and the way the audio is encoded.
\nSIP handles the call around the audio. It locates the other party and negotiates the session, then closes the session when someone hangs up. The setup messages and the audio can travel by different routes.
\nWe follow a call the whole way in how VoIP works, and from the handset's side in how a VoIP phone works.
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":20},{"id":"0faca71d-628d-42a9-bb06-aaa0e30057a0","sectionKey":"some_of_the_forms_voip_is_sold_in","sectionType":"table_section","heading":"Some of the forms VoIP is sold in","introMarkdown":null,"introHtml":null,"outroMarkdown":null,"outroHtml":null,"contentJson":{"rows":[{"cells":["Hosted phone system","Users on a provider's phone system, often priced per user per month","In the provider's cloud"]},{"cells":["SIP trunking","A connection between a phone system you run and the public telephone network","On equipment you run"]},{"cells":["Calling inside a collaboration app","Calling as one feature of an app such as Microsoft Teams","In the app provider's cloud"]},{"cells":["Digital landline","Home or office phone service delivered over broadband","In the provider's network"]}],"columns":["Form","What you subscribe to","Where the phone system runs"]},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":30},{"id":"b612cb73-ae56-4297-9d80-3ec99f542b21","sectionKey":"one_technology_several_subscriptions","sectionType":"markdown_section","heading":"One technology, several subscriptions","introMarkdown":"A single provider can sell more than one of these forms. Atlantech Online does. Its [UCaaS service](https://www.atlantech.net/solutions/voice/unified-communications) is a hosted phone system that Atlantech says runs on its cloud, so the office doesn't keep one on site. Its pricing cards start at $12 per user per month for the Business Line and $18 for the Premium Line, and the softphone app is listed on the Premium card. Its [business phone service](https://www.atlantech.net/solutions/voice/phone) page describes SIP trunking too. A business that has its own phone system can have service delivered to that system over a SIP connection.\n\nThe hosted system and the SIP connection are both VoIP. A buyer of the first gets a phone system. A buyer of the second gets a connection for a phone system they already own. We explain that second purchase in [what SIP trunking is](https://www.answerstack.io/q/what-is-sip-trunking) and in [the difference between SIP trunking and VoIP](https://www.answerstack.io/q/what-is-the-difference-between-sip-trunking-and-voip).\n\nMicrosoft Teams shows calling inside a collaboration app, and a limit that comes with it. Microsoft's [Teams Phone overview](https://learn.microsoft.com/en-us/microsoftteams/what-is-phone-system-in-office-365) says that by default, calls between Teams users in one organization are handled within Teams and don't go to the public telephone network. Calling an outside number takes a Teams Phone license and a separate connection to that network. So a service can carry voice over IP and still not reach an ordinary phone number until that connection is added.\n\nThe digital landline is the reason \"VoIP or landline\" is less clear-cut than it sounds. Ofcom's [guide to digital landlines](https://www.ofcom.org.uk/phones-and-broadband/landline-phones/future-of-landline-calls) describes UK home phone service that runs over broadband, with the phone plugged into the router. That service is still sold as a landline, and it's carried as VoIP. We go through the comparison in [how VoIP is different from a landline](https://www.answerstack.io/q/how-is-voip-different-from-a-landline).","introHtml":"A single provider can sell more than one of these forms. Atlantech Online does. Its UCaaS service is a hosted phone system that Atlantech says runs on its cloud, so the office doesn't keep one on site. Its pricing cards start at $12 per user per month for the Business Line and $18 for the Premium Line, and the softphone app is listed on the Premium card. Its business phone service page describes SIP trunking too. A business that has its own phone system can have service delivered to that system over a SIP connection.
\nThe hosted system and the SIP connection are both VoIP. A buyer of the first gets a phone system. A buyer of the second gets a connection for a phone system they already own. We explain that second purchase in what SIP trunking is and in the difference between SIP trunking and VoIP.
\nMicrosoft Teams shows calling inside a collaboration app, and a limit that comes with it. Microsoft's Teams Phone overview says that by default, calls between Teams users in one organization are handled within Teams and don't go to the public telephone network. Calling an outside number takes a Teams Phone license and a separate connection to that network. So a service can carry voice over IP and still not reach an ordinary phone number until that connection is added.
\nThe digital landline is the reason "VoIP or landline" is less clear-cut than it sounds. Ofcom's guide to digital landlines describes UK home phone service that runs over broadband, with the phone plugged into the router. That service is still sold as a landline, and it's carried as VoIP. We go through the comparison in how VoIP is different from a landline.
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":40},{"id":"8888b3eb-5bdf-4d1e-8f9e-0939c2203d76","sectionKey":"what_the_word_leaves_open","sectionType":"markdown_section","heading":"What the word leaves open","introMarkdown":"Because VoIP names a method, calling a service VoIP leaves the buying questions unanswered. The word doesn't say whether the service reaches ordinary phone numbers or which devices it supports. It doesn't say what the plan includes, or how calls will sound on your network. Those answers come from the subscription and from the path the calls take.\n\nSo when a quote says VoIP, find out which form it is before comparing prices. A per-user price for a hosted phone system and a price for a trunk into your own system pay for different things. Once you know the form, the practical list is short, and we lay it out in what you need to use VoIP.","introHtml":"Because VoIP names a method, calling a service VoIP leaves the buying questions unanswered. The word doesn't say whether the service reaches ordinary phone numbers or which devices it supports. It doesn't say what the plan includes, or how calls will sound on your network. Those answers come from the subscription and from the path the calls take.
\nSo when a quote says VoIP, find out which form it is before comparing prices. A per-user price for a hosted phone system and a price for a trunk into your own system pay for different things. Once you know the form, the practical list is short, and we lay it out in what you need to use VoIP.
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":50}],"citations":[{"title":"47 CFR 9.3, Definitions: Interconnected VoIP service","url":"https://www.law.cornell.edu/cfr/text/47/9.3","excerpt":"Enables real-time, two-way voice communications; requires a broadband connection from the user's location; requires internet protocol-compatible customer premises equipment; and permits users generally to receive calls that originate on the public switched telephone network and to terminate calls to the public switched telephone network.","quoteText":null,"sourceRole":"PRIMARY","verifiedAt":"2026-07-17T00:00:00","supportsText":"Regulatory definition of interconnected VoIP: real-time two-way voice, broadband, IP-compatible customer premises equipment, and calls to and from the PSTN","domain":"law.cornell.edu","publisherName":"Legal Information Institute, Cornell Law School"},{"title":"What is VoIP and how does it work?","url":"https://www.business.att.com/learn/tech-advice/what-is-voip-and-how-does-it-work-.html","excerpt":"VoIP is the technology that converts your voice into a digital signal, allowing you to make a call directly from a computer, a VoIP phone, or other data-driven devices.","quoteText":null,"sourceRole":"INDEPENDENT","verifiedAt":"2026-07-17T00:00:00","supportsText":"Plain-language definition of VoIP, packet-based operation, reaching the PSTN, and business benefits such as cost and features","domain":"business.att.com","publisherName":"AT&T Business"},{"title":"RFC 3261: SIP: Session Initiation Protocol","url":"https://datatracker.ietf.org/doc/html/rfc3261","excerpt":"an application-layer control (signaling) protocol for creating, modifying, and terminating sessions with one or more participants. These sessions include Internet telephone calls.","quoteText":null,"sourceRole":"PRIMARY","verifiedAt":"2026-07-17T00:00:00","supportsText":"SIP as the application-layer signaling protocol that sets up, modifies, and ends VoIP sessions such as internet telephone calls","domain":"datatracker.ietf.org","publisherName":"IETF"},{"title":"RFC 3550: RTP: A Transport Protocol for Real-Time Applications","url":"https://datatracker.ietf.org/doc/html/rfc3550","excerpt":"RTP provides end-to-end network transport functions suitable for applications transmitting real-time data, such as audio, video or simulation data.","quoteText":null,"sourceRole":"PRIMARY","verifiedAt":"2026-07-17T00:00:00","supportsText":"RTP carries the real-time audio media of a VoIP call, with sequencing and timestamps","domain":"datatracker.ietf.org","publisherName":"IETF"},{"title":"ITU-T G.711: Pulse code modulation (PCM) of voice frequencies","url":"https://www.itu.int/rec/T-REC-G.711/","excerpt":"Pulse code modulation (PCM) of voice frequencies. Status: In force.","quoteText":null,"sourceRole":"PRIMARY","verifiedAt":"2026-07-17T00:00:00","supportsText":"G.711 codec: uncompressed PCM voice at 64 kbit/s, the toll-quality narrowband standard","domain":"itu.int","publisherName":"International Telecommunication Union (ITU-T)"},{"title":"RFC 6716: Definition of the Opus Audio Codec","url":"https://datatracker.ietf.org/doc/html/rfc6716","excerpt":"It scales from low bitrate narrowband speech at 6 kbit/s to very high quality stereo music at 510 kbit/s.","quoteText":null,"sourceRole":"PRIMARY","verifiedAt":"2026-07-17T00:00:00","supportsText":"Opus codec range from 6 kbit/s narrowband speech to 510 kbit/s stereo, designed for Voice over IP","domain":"datatracker.ietf.org","publisherName":"IETF"},{"title":"G.711 vs G.729: VoIP Codec Comparison","url":"https://telcobridges.com/learning/sip-trunking/g711-vs-g729/","excerpt":"G.711: around 85 to 87 kbps per direction. G.729: around 31 kbps per direction.","quoteText":null,"sourceRole":"INDEPENDENT","verifiedAt":"2026-07-17T00:00:00","supportsText":"Per-call bandwidth including IP, UDP, and RTP overhead: G.711 about 85 to 87 kbps per direction, G.729 about 31 kbps; roughly 20 ms packetization","domain":"telcobridges.com","publisherName":"TelcoBridges"},{"title":"47 CFR 9.11: E911 service requirements for interconnected VoIP","url":"https://www.law.cornell.edu/cfr/text/47/9.11","excerpt":"specifically advise every subscriber, both new and existing, prominently and in plain language, of the circumstances under which E911 service may not be available.","quoteText":null,"sourceRole":"PRIMARY","verifiedAt":"2026-07-17T00:00:00","supportsText":"Interconnected VoIP E911 duties: transmit all 911 calls with call-back number and dispatchable or registered location, and warn customers where 911 may be limited","domain":"law.cornell.edu","publisherName":"Legal Information Institute, Cornell Law School"},{"title":"FCC Announces Compliance Dates for New E911 Rules Applicable to Multi-Line Telephone Systems and VoIP Providers","url":"https://www.wiley.law/alert-FCC-Announces-Compliance-Dates-for-New-E911-Rules-Applicable-to-Multi-Line-Telephone-Systems-and-VoIP-Providers","excerpt":"Fixed VoIP services: starting January 6, 2021. Non-fixed VoIP services: starting January 6, 2022.","quoteText":null,"sourceRole":"INDEPENDENT","verifiedAt":"2026-07-17T00:00:00","supportsText":"Compliance dates: fixed interconnected VoIP dispatchable location by January 6, 2021; non-fixed by January 6, 2022; Kari's Law direct 911 dialing for systems in service after February 16, 2020","domain":"wiley.law","publisherName":"Wiley Rein LLP"},{"title":"RFC 8224: Authenticated Identity Management in the Session Initiation Protocol (SIP)","url":"https://datatracker.ietf.org/doc/html/rfc8224","excerpt":"This document defines a mechanism for securely identifying originators of SIP requests.","quoteText":null,"sourceRole":"PRIMARY","verifiedAt":"2026-07-17T00:00:00","supportsText":"STIR mechanism that cryptographically signs the calling party's identity to counter caller ID spoofing and robocalls","domain":"datatracker.ietf.org","publisherName":"IETF"},{"title":"FCC Requires All Voice Providers to Implement STIR/SHAKEN or Adopt Robocall Mitigation Plans by Mid-2021","url":"https://www.dwt.com/insights/2020/10/fcc-stir-shaken-robocall-mitigation-plan-deadline","excerpt":"all originating and terminating voice service providers to implement the STIR/SHAKEN caller ID authentication framework in all IP portions of their networks by June 30, 2021.","quoteText":null,"sourceRole":"INDEPENDENT","verifiedAt":"2026-07-17T00:00:00","supportsText":"FCC deadline: originating and terminating providers implement STIR/SHAKEN in IP networks by June 30, 2021; providers with 100,000 or fewer lines until June 30, 2023","domain":"dwt.com","publisherName":"Davis Wright Tremaine LLP"},{"title":"6 Benefits of VoIP","url":"https://www.atlantech.net/blog/benefits-of-voip","excerpt":"Switching to a VoIP system saves small businesses up to 45 percent on their monthly phone costs.","quoteText":null,"sourceRole":"SUPPORTING","verifiedAt":"2026-07-17T00:00:00","supportsText":"Business benefits of VoIP such as cost savings and mobility; corroborated by [2]","domain":"atlantech.net","publisherName":"Atlantech Online"}],"revisions":[{"revisedAt":"2026-07-18T03:09:30.888+00:00","versionLabel":"Originally published","note":"","reviewedBy":null}],"relatedAnswers":[{"id":"a96e1365-05b5-48e7-94dd-91a34d711268","slug":"does-voip-require-an-internet-connection","question":"Does VoIP require an internet connection?","publishedAt":"2026-07-03T03:26:50.582","confidenceScore":90,"confidenceLabel":"High","industry":{"id":"ff619d7c-d7d7-485e-a05a-53fba07f33ed","slug":"telecommunications","label":"Telecommunications","description":"Business voice, fiber, UCaaS, and network services"},"topic":{"slug":"voip","label":"VoIP","description":"Voice over IP for business: how it works, what it requires, and how it compares to traditional phone service.","schemaKind":null},"contributor":{"id":"ec39deab-44fe-48d8-9029-fefe993ab85a","slug":"answer-stack","displayName":"AnswerStack","websiteUrl":null},"snippet":"Not always. VoIP needs an IP network path between the phone and the system that handles its calls. That path can be the public internet, a private connection to the provider or an office network with the phone system on site, depending on how the service is set up.","url":"/q/does-voip-require-an-internet-connection"},{"id":"0ef1cfdf-0d57-4903-8eb6-b422a49ece05","slug":"what-type-of-internet-connection-do-i-need-for-voip","question":"What type of internet connection do I need for VoIP?","publishedAt":"2026-06-25T03:27:41.235","confidenceScore":90,"confidenceLabel":"High","industry":{"id":"ff619d7c-d7d7-485e-a05a-53fba07f33ed","slug":"telecommunications","label":"Telecommunications","description":"Business voice, fiber, UCaaS, and network services"},"topic":{"slug":"voip","label":"VoIP","description":"Voice over IP for business: how it works, what it requires, and how it compares to traditional phone service.","schemaKind":null},"contributor":{"id":"ec39deab-44fe-48d8-9029-fefe993ab85a","slug":"answer-stack","displayName":"AnswerStack","websiteUrl":null},"snippet":"VoIP needs no particular connection type. It needs an IP connection to your voice provider with room in each direction for the simultaneous calls you plan to support, plus your other traffic. One G.711 call takes about 87 to 100 kbps each way. Also decide whether calls cross the public internet or the provider's network.","url":"/q/what-type-of-internet-connection-do-i-need-for-voip"},{"id":"f3429824-6f34-416e-9422-272837f4e0c9","slug":"how-much-bandwidth-does-a-voip-call-use","question":"How much bandwidth does a VoIP call use?","publishedAt":"2026-05-09T03:24:27.71","confidenceScore":84,"confidenceLabel":"High","industry":{"id":"ff619d7c-d7d7-485e-a05a-53fba07f33ed","slug":"telecommunications","label":"Telecommunications","description":"Business voice, fiber, UCaaS, and network services"},"topic":{"slug":"voip","label":"VoIP","description":"Voice over IP for business: how it works, what it requires, and how it compares to traditional phone service.","schemaKind":null},"contributor":{"id":"ec39deab-44fe-48d8-9029-fefe993ab85a","slug":"answer-stack","displayName":"AnswerStack","websiteUrl":null},"snippet":"Cisco's calculation puts a G.711 VoIP call at 87.2 kbps in each direction and a G.729 call at 31.2 kbps, counting IP, UDP, RTP and Ethernet headers with 20 milliseconds of speech per packet. The figure changes with codec, packet size and link type. Multiply it by simultaneous calls and compare it with upload and download separately.","url":"/q/how-much-bandwidth-does-a-voip-call-use"},{"id":"2bc2d203-d1bf-4685-91a1-cd586dddf234","slug":"do-i-need-a-phone-line-for-voip","question":"Do I need a phone line for VoIP?","publishedAt":"2026-05-02T03:33:04.199","confidenceScore":92,"confidenceLabel":"High","industry":{"id":"ff619d7c-d7d7-485e-a05a-53fba07f33ed","slug":"telecommunications","label":"Telecommunications","description":"Business voice, fiber, UCaaS, and network services"},"topic":{"slug":"voip","label":"VoIP","description":"Voice over IP for business: how it works, what it requires, and how it compares to traditional phone service.","schemaKind":null},"contributor":{"id":"ec39deab-44fe-48d8-9029-fefe993ab85a","slug":"answer-stack","displayName":"AnswerStack","websiteUrl":null},"snippet":"No. VoIP needs a data connection and a compatible device or app, not a traditional analog phone line. Calling ordinary phone numbers also takes a service connected to the public telephone network. Check your internet, number and connected devices before cancelling the old line.","url":"/q/do-i-need-a-phone-line-for-voip"}],"contributorStats":{"verifiedAnswers":149,"openDisputes":0},"schemaJson":{"@context":"https://schema.org","@type":"Question","name":"What is VoIP?","text":"What is VoIP?","url":"https://www.answerstack.io/q/what-is-voip","answerCount":1,"datePublished":"2026-04-23T03:09:30.888","about":[{"@type":"Thing","name":"VoIP"},{"@type":"Thing","name":"Telecommunications"}],"acceptedAnswer":{"@type":"Answer","text":"VoIP, short for voice over Internet Protocol, is the group of technologies that carries a voice call as data over an IP network. The term describes how a call travels. It doesn't describe a product, so two services sold as VoIP can have little in common beyond that.","url":"https://www.answerstack.io/q/what-is-voip","upvoteCount":0,"datePublished":"2026-04-23T03:09:30.888","dateModified":"2026-07-17T00:00:00","citation":[{"@type":"CreativeWork","name":"47 CFR 9.3, Definitions: Interconnected VoIP service","url":"https://www.law.cornell.edu/cfr/text/47/9.3"},{"@type":"CreativeWork","name":"What is VoIP and how does it work?","url":"https://www.business.att.com/learn/tech-advice/what-is-voip-and-how-does-it-work-.html"},{"@type":"CreativeWork","name":"RFC 3261: SIP: Session Initiation Protocol","url":"https://datatracker.ietf.org/doc/html/rfc3261"},{"@type":"CreativeWork","name":"RFC 3550: RTP: A Transport Protocol for Real-Time Applications","url":"https://datatracker.ietf.org/doc/html/rfc3550"},{"@type":"CreativeWork","name":"ITU-T G.711: Pulse code modulation (PCM) of voice frequencies","url":"https://www.itu.int/rec/T-REC-G.711/"},{"@type":"CreativeWork","name":"RFC 6716: Definition of the Opus Audio Codec","url":"https://datatracker.ietf.org/doc/html/rfc6716"},{"@type":"CreativeWork","name":"G.711 vs G.729: VoIP Codec Comparison","url":"https://telcobridges.com/learning/sip-trunking/g711-vs-g729/"},{"@type":"CreativeWork","name":"47 CFR 9.11: E911 service requirements for interconnected VoIP","url":"https://www.law.cornell.edu/cfr/text/47/9.11"},{"@type":"CreativeWork","name":"FCC Announces Compliance Dates for New E911 Rules Applicable to Multi-Line Telephone Systems and VoIP Providers","url":"https://www.wiley.law/alert-FCC-Announces-Compliance-Dates-for-New-E911-Rules-Applicable-to-Multi-Line-Telephone-Systems-and-VoIP-Providers"},{"@type":"CreativeWork","name":"RFC 8224: Authenticated Identity Management in the Session Initiation Protocol (SIP)","url":"https://datatracker.ietf.org/doc/html/rfc8224"},{"@type":"CreativeWork","name":"FCC Requires All Voice Providers to Implement STIR/SHAKEN or Adopt Robocall Mitigation Plans by Mid-2021","url":"https://www.dwt.com/insights/2020/10/fcc-stir-shaken-robocall-mitigation-plan-deadline"},{"@type":"CreativeWork","name":"6 Benefits of VoIP","url":"https://www.atlantech.net/blog/benefits-of-voip"}]}}}