To use VoIP you need three things at a minimum: a working internet connection, an account with a VoIP service provider, and at least one device that can place the call, whether that is an IP desk phone, a softphone app on a computer or smartphone, or an ordinary analog phone plugged into an analog telephone adapter.[1][5] Each concurrent call uses roughly 100 kbps in each direction on the common G.711 codec, so the connection matters more for its steadiness than its raw speed, and a single call runs fine on well under half a megabit per second.[3][6] In a business setting you also want a network that prioritizes voice traffic and, in most cases, desk phones powered over the Ethernet cable, plus a 911 service address registered with your provider so emergency calls route to the right place.[2][7][8]
\n","summary":"At a minimum, VoIP needs broadband internet, an account with a VoIP provider, and one endpoint: an IP phone, a softphone app, or an analog phone with an adapter. A single call uses only about 100 kbps, but low latency and jitter matter more than headline speed. Business setups add QoS, Power over Ethernet, and a registered 911 address.","publishedAt":"2026-07-18T03:25:06","verifiedAt":"2026-07-17T00:00:00","editorialStatus":"APPROVED","lastReviewedAt":"2026-07-17T00:00:00","nextReviewDueAt":"2026-10-17T00:00:00","templateVersion":"v2","aliases":["What do you need for VoIP?","VoIP requirements","What equipment do I need for VoIP?","What is required to use VoIP?","What hardware do I need for VoIP phone service?","Do I need special equipment for VoIP?","What internet speed do I need for VoIP?","How much bandwidth does VoIP need?","What do I need to set up VoIP at my business?","Requirements for VoIP phone service","What do I need to make VoIP calls?","Getting started with VoIP"],"confidenceScore":90,"confidenceLabel":"High","canonicalUrl":null},"contributor":{"id":"ec39deab-44fe-48d8-9029-fefe993ab85a","slug":"answer-stack","displayName":"AnswerStack","websiteUrl":null},"contributorOrganizationProfile":{"entityId":"ec39deab-44fe-48d8-9029-fefe993ab85a","legalName":null,"description":null,"websiteUrl":null,"imageUrl":null,"slogan":null,"subtitle":null,"facts":[],"coiNote":null,"foundingDate":null,"numberOfEmployeesText":null,"contactPoint":null,"address":null,"headquartersText":null,"organizationType":null},"contributorPerson":{"slug":"answerstack-editorial-team","displayName":"AnswerStack Editorial Team"},"sections":[{"id":"82caa391-02a6-4ed4-86c1-59f2a4fe625e","sectionKey":"what_you_need_overview","sectionType":"markdown_section","heading":"What do you actually need to use VoIP?","introMarkdown":"Using VoIP comes down to three essentials, plus a few things a business will want on top of them. Voice over Internet Protocol carries your calls as data packets across an internet connection instead of over a dedicated copper phone line, so the phone company's wire is replaced by your broadband link and a provider that connects your calls to everyone else.[1] The three essentials are a stable internet connection, an account with a VoIP provider, and at least one endpoint that can send and receive the audio.[1] Everything else, from Power over Ethernet to call-prioritizing switches, exists to make those three work reliably once more than one person is on the phone.\n\nA home user can often start with equipment already on hand. Most homes have a modem and router, or a combined gateway, which is all the network hardware a single line needs, and a smartphone app or an inexpensive adapter turns an existing phone into a VoIP endpoint.[6] VoIP is also forgiving on speed, since a single call needs less than half a megabit per second of download capacity, which nearly every modern broadband plan clears with room to spare.[6]\n\n### Where a business setup differs\n\nA business has to plan for many calls at once and for the reliability people expect from a phone. That means sizing bandwidth for concurrent calls, giving voice traffic priority on the network so a large file transfer cannot degrade a call, and often powering desk phones through the network cable rather than a wall outlet.[2][7] United States providers of interconnected VoIP also have to route your 911 calls to the right emergency center, which requires you to register the physical address where each phone is used.[8] The sections below take each requirement in turn, starting with the connection everything else depends on.","introHtml":"Using VoIP comes down to three essentials, plus a few things a business will want on top of them. Voice over Internet Protocol carries your calls as data packets across an internet connection instead of over a dedicated copper phone line, so the phone company's wire is replaced by your broadband link and a provider that connects your calls to everyone else.[1] The three essentials are a stable internet connection, an account with a VoIP provider, and at least one endpoint that can send and receive the audio.[1] Everything else, from Power over Ethernet to call-prioritizing switches, exists to make those three work reliably once more than one person is on the phone.
\nA home user can often start with equipment already on hand. Most homes have a modem and router, or a combined gateway, which is all the network hardware a single line needs, and a smartphone app or an inexpensive adapter turns an existing phone into a VoIP endpoint.[6] VoIP is also forgiving on speed, since a single call needs less than half a megabit per second of download capacity, which nearly every modern broadband plan clears with room to spare.[6]
\nA business has to plan for many calls at once and for the reliability people expect from a phone. That means sizing bandwidth for concurrent calls, giving voice traffic priority on the network so a large file transfer cannot degrade a call, and often powering desk phones through the network cable rather than a wall outlet.[2][7] United States providers of interconnected VoIP also have to route your 911 calls to the right emergency center, which requires you to register the physical address where each phone is used.[8] The sections below take each requirement in turn, starting with the connection everything else depends on.
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":0},{"id":"beaecadb-8074-42b0-908e-905e65d9d811","sectionKey":"requirements_table","sectionType":"table_section","heading":"The core requirements at a glance","introMarkdown":"Five requirements cover almost every VoIP setup, from a single home line to a multi-site office. The table summarizes each one, and the sections after it explain why the requirement matters and what to put in place.","introHtml":"Five requirements cover almost every VoIP setup, from a single home line to a multi-site office. The table summarizes each one, and the sections after it explain why the requirement matters and what to put in place.
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{"rows":[{"cells":["Internet connection","Carries every call as data, so steadiness matters more than raw speed [3]","Broadband with low latency and jitter, sized at about 100 kbps per concurrent call [3]"]},{"cells":["VoIP provider account","Connects your calls to the public phone network [1]","A hosted VoIP plan, or a SIP trunk if you run your own phone system [1]"]},{"cells":["An endpoint","The thing you actually talk on [1]","IP desk phone, softphone app, or an analog phone plus an ATA [5]"]},{"cells":["Voice-ready network and power","Keeps calls clear when the network is busy [2]","Router or switch with QoS, and Power over Ethernet for desk phones [7]"]},{"cells":["Registered 911 address","Routes emergency calls to the right responders [8]","The physical service address on file with your provider, kept current [8]"]}],"columns":["Requirement","Why it matters","What to put in place"]},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":1},{"id":"5b149be4-a8ce-494b-8961-347e35fd52aa","sectionKey":"internet_and_bandwidth","sectionType":"markdown_section","heading":"How much internet do you need for VoIP?","introMarkdown":"A single VoIP call needs little capacity, but it needs that capacity to arrive on time and in order, which is why connection quality matters more than a big download number. Each concurrent call on the common G.711 codec uses about 100 kbps in each direction once packet overhead is counted, and a more compressed codec such as G.729 drops that to roughly 31 kbps at some cost to clarity.[3][4] Microsoft rates a single audio stream at about 58 kbps up and down for good quality on its own platform, which lands in the same range.[2] To size a connection for more than one line, multiply your peak number of simultaneous calls by roughly 100 kbps and add headroom for spikes and retransmissions.[3]\n\nThree quality measures decide whether those packets become clean audio. Latency, the one-way delay, should stay under 150 milliseconds so conversation feels natural, jitter, the variation in packet timing, should stay below 30 milliseconds, and packet loss should sit under about half a percent.[3] A connection can post a high speed-test result and still deliver poor calls if it spikes in latency or drops packets under load, so a wired connection and an internet plan with steady performance beat raw bandwidth for voice. Most modern broadband clears the download requirement easily, since a single call runs on well under half a megabit per second.[6]","introHtml":"A single VoIP call needs little capacity, but it needs that capacity to arrive on time and in order, which is why connection quality matters more than a big download number. Each concurrent call on the common G.711 codec uses about 100 kbps in each direction once packet overhead is counted, and a more compressed codec such as G.729 drops that to roughly 31 kbps at some cost to clarity.[3][4] Microsoft rates a single audio stream at about 58 kbps up and down for good quality on its own platform, which lands in the same range.[2] To size a connection for more than one line, multiply your peak number of simultaneous calls by roughly 100 kbps and add headroom for spikes and retransmissions.[3]
\nThree quality measures decide whether those packets become clean audio. Latency, the one-way delay, should stay under 150 milliseconds so conversation feels natural, jitter, the variation in packet timing, should stay below 30 milliseconds, and packet loss should sit under about half a percent.[3] A connection can post a high speed-test result and still deliver poor calls if it spikes in latency or drops packets under load, so a wired connection and an internet plan with steady performance beat raw bandwidth for voice. Most modern broadband clears the download requirement easily, since a single call runs on well under half a megabit per second.[6]
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":2},{"id":"cd77d488-f2a3-423e-99d9-8a0e3e5927d4","sectionKey":"provider_account","sectionType":"markdown_section","heading":"Why you need a VoIP provider account","introMarkdown":"A VoIP call reaches an ordinary phone number only through a provider that bridges your internet connection to the public telephone network, so an account with one is not optional.[1] There are two common ways to buy that connection. A hosted, or cloud, VoIP plan puts the call-handling system on the provider's own infrastructure and bills per user or per line, which is why most small and midsize offices choose it, as there is no phone system to run on site.[1] A SIP trunk is the alternative for an organization that already operates its own phone system, or PBX, and wants to keep it, because the trunk supplies the outside connectivity that carries the PBX's calls over the internet.[1]\n\nWhichever you choose, the provider is what gives you working phone numbers and dial tone, the calling features people expect such as voicemail and an auto-attendant, and the routing that connects your calls to everyone else.[1] In the United States the provider also carries the legal duty to route your 911 calls, which is one reason running every piece of a phone system yourself is rare outside large enterprises.[8] For most buyers the decision is less about capability and more about how much of the system you want to operate yourself.","introHtml":"A VoIP call reaches an ordinary phone number only through a provider that bridges your internet connection to the public telephone network, so an account with one is not optional.[1] There are two common ways to buy that connection. A hosted, or cloud, VoIP plan puts the call-handling system on the provider's own infrastructure and bills per user or per line, which is why most small and midsize offices choose it, as there is no phone system to run on site.[1] A SIP trunk is the alternative for an organization that already operates its own phone system, or PBX, and wants to keep it, because the trunk supplies the outside connectivity that carries the PBX's calls over the internet.[1]
\nWhichever you choose, the provider is what gives you working phone numbers and dial tone, the calling features people expect such as voicemail and an auto-attendant, and the routing that connects your calls to everyone else.[1] In the United States the provider also carries the legal duty to route your 911 calls, which is one reason running every piece of a phone system yourself is rare outside large enterprises.[8] For most buyers the decision is less about capability and more about how much of the system you want to operate yourself.
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":3},{"id":"7889f938-a4a3-4440-8a61-97ec4745a57c","sectionKey":"endpoint_devices","sectionType":"markdown_section","heading":"What device do you make VoIP calls on?","introMarkdown":"You make VoIP calls on one of three kinds of endpoint, and plenty of setups mix them by role.[1] An IP desk phone is the closest match to a traditional office phone, since it speaks the Session Initiation Protocol, plugs into the network with an Ethernet cable, and needs no computer to work.[1] A softphone is an application that turns a laptop or smartphone into a phone, which is why remote and hybrid teams often skip desk hardware and use the provider's desktop and mobile apps instead.[1][6]\n\nThe third option keeps a phone you already own. An analog telephone adapter, or ATA, sits between a standard analog handset or fax machine and your internet connection, converting the analog signal into digital voice packets and speaking SIP to the provider.[5] A typical ATA offers an RJ-11 FXS port for the phone on one side and an Ethernet port for the network on the other, so an old cordless phone or a fax line can keep working without replacement.[5] Home setups sometimes use a base-station adapter that plays the same role.[6]\n\nSoftphone users usually add a headset with a microphone for hands-free calling and cleaner audio, while desk-phone users get that built in. The practical choice tends to follow the person, because a contact-center agent or a fax line has different needs than a field salesperson who lives in a mobile app.","introHtml":"You make VoIP calls on one of three kinds of endpoint, and plenty of setups mix them by role.[1] An IP desk phone is the closest match to a traditional office phone, since it speaks the Session Initiation Protocol, plugs into the network with an Ethernet cable, and needs no computer to work.[1] A softphone is an application that turns a laptop or smartphone into a phone, which is why remote and hybrid teams often skip desk hardware and use the provider's desktop and mobile apps instead.[1][6]
\nThe third option keeps a phone you already own. An analog telephone adapter, or ATA, sits between a standard analog handset or fax machine and your internet connection, converting the analog signal into digital voice packets and speaking SIP to the provider.[5] A typical ATA offers an RJ-11 FXS port for the phone on one side and an Ethernet port for the network on the other, so an old cordless phone or a fax line can keep working without replacement.[5] Home setups sometimes use a base-station adapter that plays the same role.[6]
\nSoftphone users usually add a headset with a microphone for hands-free calling and cleaner audio, while desk-phone users get that built in. The practical choice tends to follow the person, because a contact-center agent or a fax line has different needs than a field salesperson who lives in a mobile app.
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":4},{"id":"5ea59947-149d-4237-9c4a-af7719bfac3a","sectionKey":"network_and_power","sectionType":"markdown_section","heading":"What network setup keeps VoIP calls clear?","introMarkdown":"The setup that keeps calls clear gives voice packets priority on the network and reliable power to the phones. Quality of Service, or QoS, is a setting on your router or switch that tags voice as high-priority traffic so a large upload or a video stream cannot starve a call of bandwidth, and applying it across every segment of a managed network is the standard recommendation rather than a nice-to-have.[2] Without it, calls tend to break up exactly when the network gets busy.\n\n### Power over Ethernet for desk phones\n\nPower over Ethernet sends both data and electricity down the same cable, so a desk phone draws power from the switch and needs no wall adapter or nearby outlet. The original 802.3af standard supplies up to 15.4 watts from the switch port, of which about 12.95 watts reaches the phone after cable loss, while 802.3at, marketed as PoE+, raises the budget to 25.5 watts for phones with color screens or expansion modules.[7] A small site can run on a modem and router, or a single gateway, but a PoE switch is what makes a row of desk phones practical.[6]\n\n### Keeping calls up in an outage\n\nBecause the phones and the network now run on your electricity rather than the phone company's, a battery backup on the modem, router, and switch keeps calls alive through a short power cut.[8] When a business moves to hosted VoIP, providers typically assess whether the local and wide-area network and the Wi-Fi can carry the added voice traffic with proper QoS, and may recommend new phones or a network upgrade before cutover.[9][1]","introHtml":"The setup that keeps calls clear gives voice packets priority on the network and reliable power to the phones. Quality of Service, or QoS, is a setting on your router or switch that tags voice as high-priority traffic so a large upload or a video stream cannot starve a call of bandwidth, and applying it across every segment of a managed network is the standard recommendation rather than a nice-to-have.[2] Without it, calls tend to break up exactly when the network gets busy.
\nPower over Ethernet sends both data and electricity down the same cable, so a desk phone draws power from the switch and needs no wall adapter or nearby outlet. The original 802.3af standard supplies up to 15.4 watts from the switch port, of which about 12.95 watts reaches the phone after cable loss, while 802.3at, marketed as PoE+, raises the budget to 25.5 watts for phones with color screens or expansion modules.[7] A small site can run on a modem and router, or a single gateway, but a PoE switch is what makes a row of desk phones practical.[6]
\nBecause the phones and the network now run on your electricity rather than the phone company's, a battery backup on the modem, router, and switch keeps calls alive through a short power cut.[8] When a business moves to hosted VoIP, providers typically assess whether the local and wide-area network and the Wi-Fi can carry the added voice traffic with proper QoS, and may recommend new phones or a network upgrade before cutover.[9][1]
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":5},{"id":"3e876f13-db42-4f2f-9590-69c5660ca79c","sectionKey":"voip_911_setup","sectionType":"markdown_section","heading":"Do you need to set up 911 for VoIP?","introMarkdown":"Yes, and 911 for VoIP works differently from a landline, so it needs deliberate setup. Under United States rules for interconnected VoIP, your provider must transmit each 911 call along with a callback number and your registered physical location to the correct emergency call center, and it has to obtain that location from you before service starts.[8] Because a VoIP phone can be carried anywhere there is internet, the address on file does not update itself. Your provider must give you a way to change your Registered Location when the phone moves, and it is on you to keep it current so responders reach the right building.[8]\n\nProviders are also required to tell you in plain language that 911 may be unavailable during a power outage, a broadband failure, or if you relocate the equipment, and to obtain your acknowledgement that you understand those limits.[8] That advisory is the reason a battery backup and a charged mobile phone matter as fallbacks. Fixed services increasingly deliver an automated dispatchable location with each call, but where that is not technically feasible, the registered-address model is what stands between a caller and a misrouted emergency response.[8] None of this is an optional add-on, because it is a federal requirement that applies to the service itself.","introHtml":"Yes, and 911 for VoIP works differently from a landline, so it needs deliberate setup. Under United States rules for interconnected VoIP, your provider must transmit each 911 call along with a callback number and your registered physical location to the correct emergency call center, and it has to obtain that location from you before service starts.[8] Because a VoIP phone can be carried anywhere there is internet, the address on file does not update itself. Your provider must give you a way to change your Registered Location when the phone moves, and it is on you to keep it current so responders reach the right building.[8]
\nProviders are also required to tell you in plain language that 911 may be unavailable during a power outage, a broadband failure, or if you relocate the equipment, and to obtain your acknowledgement that you understand those limits.[8] That advisory is the reason a battery backup and a charged mobile phone matter as fallbacks. Fixed services increasingly deliver an automated dispatchable location with each call, but where that is not technically feasible, the registered-address model is what stands between a caller and a misrouted emergency response.[8] None of this is an optional add-on, because it is a federal requirement that applies to the service itself.
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":6},{"id":"867ae20c-389c-403e-8223-274c66376466","sectionKey":"contributor_perspective","sectionType":"markdown_section","heading":"How this answer was researched","introMarkdown":"This answer pulls together vendor documentation, an active federal regulation, and independent technical references rather than a single provider's sales page, because what you need for VoIP looks different for a one-line home user than for an office running dozens of concurrent calls. The bandwidth and quality figures come from network-engineering sources and a major platform's own published guidance, and the 911 requirements come straight from the Code of Federal Regulations so they reflect current obligations rather than a paraphrase. Product names, license models, and hardware thresholds were checked live on the verification date shown, since codecs, provider packages, and equipment standards change over time. Telecom practitioners who provision VoIP for a living, network engineers, and 911 compliance specialists are welcome to suggest corrections or additions so the answer keeps pace with how deployments actually work.","introHtml":"This answer pulls together vendor documentation, an active federal regulation, and independent technical references rather than a single provider's sales page, because what you need for VoIP looks different for a one-line home user than for an office running dozens of concurrent calls. The bandwidth and quality figures come from network-engineering sources and a major platform's own published guidance, and the 911 requirements come straight from the Code of Federal Regulations so they reflect current obligations rather than a paraphrase. Product names, license models, and hardware thresholds were checked live on the verification date shown, since codecs, provider packages, and equipment standards change over time. Telecom practitioners who provision VoIP for a living, network engineers, and 911 compliance specialists are welcome to suggest corrections or additions so the answer keeps pace with how deployments actually work.
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":"This answer was written and reviewed by the AnswerStack Editorial Team, which has no commercial stake in the products, companies, or methods discussed. Every claim is cited inline and verified on the dates shown.","noteHtml":"This answer was written and reviewed by the AnswerStack Editorial Team, which has no commercial stake in the products, companies, or methods discussed. Every claim is cited inline and verified on the dates shown.
\n","sortOrder":7},{"id":"93eae42c-17bb-43b5-ab90-5ae0c22d3244","sectionKey":"trade_offs","sectionType":"markdown_section","heading":"Trade-offs and gaps to plan for","introMarkdown":"Moving voice onto the internet shifts a few responsibilities onto you, and each one is worth planning for before cutover.\n\n### Power and internet become your responsibility\n\nA landline draws power from the phone company and usually keeps working in an outage, while VoIP runs on your electricity and your internet, so both the phones and the connection go down when either fails.[8] A UPS on the network gear and a mobile phone as backup cover most of that gap.\n\n### Call quality tracks your network, not the plan\n\nBecause the audio travels over the public internet and your local network, jitter or packet loss anywhere along the path shows up as choppy or robotic sound, and the fix is usually QoS and enough bandwidth rather than a different provider.[3][2]\n\n### 911 needs active upkeep\n\nThe registered-address model means a phone carried to a new location can send responders to the old one until someone updates it, so a portable phone is convenient but adds a small compliance chore.[8]\n\n### Older hardware may not survive the switch\n\nMoving an office to hosted VoIP can require new phones or a network upgrade, so budgeting only for the monthly service and not the readiness work is a common miss.[9][1]","introHtml":"Moving voice onto the internet shifts a few responsibilities onto you, and each one is worth planning for before cutover.
\nA landline draws power from the phone company and usually keeps working in an outage, while VoIP runs on your electricity and your internet, so both the phones and the connection go down when either fails.[8] A UPS on the network gear and a mobile phone as backup cover most of that gap.
\nBecause the audio travels over the public internet and your local network, jitter or packet loss anywhere along the path shows up as choppy or robotic sound, and the fix is usually QoS and enough bandwidth rather than a different provider.[3][2]
\nThe registered-address model means a phone carried to a new location can send responders to the old one until someone updates it, so a portable phone is convenient but adds a small compliance chore.[8]
\nMoving an office to hosted VoIP can require new phones or a network upgrade, so budgeting only for the monthly service and not the readiness work is a common miss.[9][1]
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":8},{"id":"b2eac3ae-6f14-4617-8199-bdf4f8f77a02","sectionKey":"what_you_do_not_need","sectionType":"markdown_section","heading":"What you do not need for VoIP","introMarkdown":"A few things people expect to buy turn out to be optional or unnecessary. You do not need a traditional phone line, because VoIP replaces it, and many businesses port their existing numbers over and cancel the copper.[1] You do not need a computer left running, since IP phones and ATAs register with the provider on their own and a softphone only has to be open when you want to make a call.[5] You also do not need an unusually fast connection, because a single call fits in well under a megabit and quality depends far more on latency and jitter than on headline download speed.[6][3] The one thing you cannot skip is the 911 registration, which is a regulatory requirement rather than an optional add-on.[8]","introHtml":"A few things people expect to buy turn out to be optional or unnecessary. You do not need a traditional phone line, because VoIP replaces it, and many businesses port their existing numbers over and cancel the copper.[1] You do not need a computer left running, since IP phones and ATAs register with the provider on their own and a softphone only has to be open when you want to make a call.[5] You also do not need an unusually fast connection, because a single call fits in well under a megabit and quality depends far more on latency and jitter than on headline download speed.[6][3] The one thing you cannot skip is the 911 registration, which is a regulatory requirement rather than an optional add-on.[8]
\n","outroMarkdown":null,"outroHtml":null,"contentJson":{},"configJson":{},"noteMarkdown":null,"noteHtml":null,"sortOrder":9}],"citations":[{"title":"VoIP Phone Service Overview","url":"https://www.ringcentral.com/office/features/voip/overview.html","excerpt":"IP desk phones that utilize standard Session Initiation Protocol (SIP)... You just need an Analog Telephone Adapter (ATA), which digitizes analog voice data into data packets.","quoteText":null,"sourceRole":"PRIMARY","verifiedAt":"2026-07-17T00:00:00","supportsText":"Core requirements: internet connection, provider account, and endpoint options (IP desk phones using SIP, desktop and mobile softphone apps, or an analog phone with an ATA); hosted VoIP versus SIP trunk; provider supplies numbers and features.","domain":"ringcentral.com","publisherName":"RingCentral"},{"title":"Prepare your organization's network for Teams","url":"https://learn.microsoft.com/en-us/microsoftteams/prepare-network","excerpt":"Audio One-to-one 10/10 (minimum) 58/58 (recommended)... QoS should be implemented on all segments of a managed network.","quoteText":null,"sourceRole":"PRIMARY","verifiedAt":"2026-07-17T00:00:00","supportsText":"Recommended audio bandwidth of about 58 kbps up and down per stream; QoS should be implemented on all segments of a managed network; voice is prioritized over video when bandwidth is limited.","domain":"learn.microsoft.com","publisherName":"Microsoft Learn"},{"title":"VoIP Network Requirements: Bandwidth, QoS, and Infrastructure","url":"https://www.ipcomms.net/blog/voip-network-requirements/","excerpt":"For G.711, multiply your peak concurrent calls by 100 kbps (with some overhead margin)... latency < 150ms... jitter should be kept below 30ms... 0-0.5% loss: No noticeable effect on call quality.","quoteText":null,"sourceRole":"INDEPENDENT","verifiedAt":"2026-07-17T00:00:00","supportsText":"About 100 kbps per concurrent G.711 call; size bandwidth by multiplying peak concurrent calls by 100 kbps plus headroom; latency under 150 ms, jitter under 30 ms, packet loss under about half a percent.","domain":"ipcomms.net","publisherName":"IPComms"},{"title":"How to Calculate Bandwidth for Cisco IP Calls","url":"https://www.cbtnuggets.com/blog/technology/networking/how-to-calculate-bandwidth-for-cisco-ip-calls","excerpt":"G.711... 87.2... G.729... 31.2... IP, UDP, and RTP protocols will incur and add 40 bytes.","quoteText":null,"sourceRole":"INDEPENDENT","verifiedAt":"2026-07-17T00:00:00","supportsText":"Per-call bandwidth including overhead: G.711 about 87.2 kbps and G.729 about 31.2 kbps; IP, UDP, and RTP headers add 40 bytes, with Ethernet adding a further 18 bytes.","domain":"cbtnuggets.com","publisherName":"CBT Nuggets"},{"title":"What is an analog telephone adapter (ATA)?","url":"https://www.techtarget.com/searchunifiedcommunications/definition/analog-telephone-adapter","excerpt":"An analog telephone adapter (ATA) is a device used to connect an analog telephone, fax machine or similar equipment to a computer or network to enable communications over the internet.","quoteText":null,"sourceRole":"INDEPENDENT","verifiedAt":"2026-07-17T00:00:00","supportsText":"Definition and role of an ATA: converts analog phone or fax signals to digital packets for internet calling, uses FXS/RJ-11 and Ethernet ports, and speaks SIP with codecs such as G.711.","domain":"techtarget.com","publisherName":"TechTarget"},{"title":"What VoIP devices do you need for VoIP service?","url":"https://www.ooma.com/blog/home-phone/what-voip-devices-do-you-need-for-voip-service/","excerpt":"VoIP calls require a minimum download speed of less than 0.5 Mbps... an analog telephone adapter (ATA)... acts as the bridge between your traditional analog phone and the digital VoIP network.","quoteText":null,"sourceRole":"INDEPENDENT","verifiedAt":"2026-07-17T00:00:00","supportsText":"Home setup needs a modem and router, or a gateway; devices are an ATA for an existing analog phone or a mobile/softphone app; a single call needs a minimum download speed of less than 0.5 Mbps.","domain":"ooma.com","publisherName":"Ooma"},{"title":"Power over Ethernet","url":"https://en.wikipedia.org/wiki/Power_over_Ethernet","excerpt":"IEEE 802.3af-2003... provides up to 15.4 W... only 12.95 W is guaranteed to be available at the powered device... IEEE 802.3at-2009... providing up to 25.5 W.","quoteText":null,"sourceRole":"INDEPENDENT","verifiedAt":"2026-07-17T00:00:00","supportsText":"IEEE 802.3af supplies up to 15.4 W from the port with about 12.95 W guaranteed at the powered device; IEEE 802.3at (PoE+) supplies up to 25.5 W; used to power devices such as VoIP phones.","domain":"en.wikipedia.org","publisherName":"Wikipedia"},{"title":"47 CFR 9.11: E911 service requirements for interconnected VoIP","url":"https://www.law.cornell.edu/cfr/text/47/9.11","excerpt":"obtain... prior to the initiation of service... one or more methods of updating their Registered Location... specifically advise every subscriber... of the circumstances under which E911 service may not be available.","quoteText":null,"sourceRole":"PRIMARY","verifiedAt":"2026-07-17T00:00:00","supportsText":"Interconnected VoIP providers must transmit 911 calls with a callback number and location; obtain the customer's location before service; provide a way to update Registered Location; advise subscribers of E911 limitations during power loss or broadband failure and obtain acknowledgement.","domain":"law.cornell.edu","publisherName":"Legal Information Institute, Cornell Law School"},{"title":"How to Move Voice Services to the Cloud: The Best Practices","url":"https://www.atlantech.net/blog/how-to-move-voice-services-to-the-cloud","excerpt":"Purchase of new telephones may be required... your local area network (LAN) can accommodate the bandwidth requirements needed for appropriate quality of service.","quoteText":null,"sourceRole":"SUPPORTING","verifiedAt":"2026-07-17T00:00:00","supportsText":"Corroborates that moving a business to hosted VoIP may require new telephones and a network readiness check (LAN, WAN, and wireless able to support VoIP and adequate QoS); paired with the provider primary source, never sole support.","domain":"atlantech.net","publisherName":"Atlantech Online"}],"revisions":[],"relatedAnswers":[{"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":"2026-07-18T03:33:04.199","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":"VoIP replaces the phone line with a broadband internet connection, not dial-tone service. You need bandwidth of about 85 to 100 kbps per call and a device to talk on: an IP phone, a softphone app, or a regular phone on an adapter. You can keep your existing landline number by porting it. The real trade-offs are power and internet dependence, which battery backup helps cover, and 911 that routes to an address you register.","url":"/q/do-i-need-a-phone-line-for-voip"},{"id":"316da151-4ac7-4ec8-9c85-ce74f5593693","slug":"do-i-need-a-special-phone-for-voip","question":"Do I need a special phone for VoIP?","publishedAt":"2026-07-18T03:30:09.851","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":"A dedicated VoIP handset is optional. The same call can run through a softphone app on a phone or laptop, a purpose-built IP desk phone, a web browser using WebRTC, or your current analog phone plugged into an adapter. Each path needs an internet connection and equipment that can speak VoIP. Certified or approved phones exist for full feature support, but any SIP-compliant device generally works, and a whole team can pilot VoIP on hardware people already own.","url":"/q/do-i-need-a-special-phone-for-voip"},{"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":"2026-07-18T03:27:41.235","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":"A VoIP call needs very little bandwidth, roughly 100 kbps in each direction, so the deciding factors are upload capacity and network quality rather than raw download speed. Aim for latency under 150 ms, jitter under 30 ms, and packet loss under 1 percent, and size the link to your peak number of simultaneous calls. Fiber, cable, DSL, fixed wireless, and low-orbit satellite can all carry voice; symmetrical fiber handles many concurrent lines best, while geostationary satellite adds too much delay.","url":"/q/what-type-of-internet-connection-do-i-need-for-voip"},{"id":"3e40a234-e3c8-43ca-885e-273a0204f4b3","slug":"how-is-voip-different-from-a-landline","question":"How is VoIP different from a landline?","publishedAt":"2026-07-18T03:27:24.417","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":"A landline carries your voice as an electrical signal over a dedicated copper circuit on the traditional phone network, while VoIP sends it as digital packets over your broadband internet. That split drives the rest: a landline keeps working in a power outage and reports a fixed 911 address, while VoIP costs less, moves between devices, adds features like mobile apps and voicemail-to-email, and depends on your own power and internet. US rules class VoIP that reaches the phone network as 'interconnected VoIP,' with its own 911 duties.","url":"/q/how-is-voip-different-from-a-landline"}],"contributorStats":{"verifiedAnswers":224,"openDisputes":0},"schemaJson":{"@context":"https://schema.org","@type":"Question","name":"What do I need to use VoIP?","text":"What do I need to use VoIP?","url":"https://www.answerstack.io/q/what-do-i-need-to-use-voip","answerCount":1,"datePublished":"2026-07-18T03:25:06","author":{"@type":"Person","name":"AnswerStack Editorial Team","worksFor":{"@type":"Organization","name":"AnswerStack"},"url":"https://www.answerstack.io/contributors/answer-stack"},"about":[{"@type":"Thing","name":"VoIP"},{"@type":"Thing","name":"Telecommunications"}],"acceptedAnswer":{"@type":"Answer","text":"To use VoIP you need three things at a minimum: a working internet connection, an account with a VoIP service provider, and at least one device that can place the call, whether that is an IP desk phone, a softphone app on a computer or smartphone, or an ordinary analog phone plugged into an analog telephone adapter.[1][5] Each concurrent call uses roughly 100 kbps in each direction on the common G.711 codec, so the connection matters more for its steadiness than its raw speed, and a single call runs fine on well under half a megabit per second.[3][6] In a business setting you also want a network that prioritizes voice traffic and, in most cases, desk phones powered over the Ethernet cable, plus a 911 service address registered with your provider so emergency calls route to the right place.[2][7][8]","url":"https://www.answerstack.io/q/what-do-i-need-to-use-voip","upvoteCount":0,"datePublished":"2026-07-18T03:25:06","dateModified":"2026-07-17T00:00:00","author":{"@type":"Person","name":"AnswerStack Editorial Team","worksFor":{"@type":"Organization","name":"AnswerStack"},"url":"https://www.answerstack.io/contributors/answer-stack"},"citation":[{"@type":"CreativeWork","name":"VoIP Phone Service Overview","url":"https://www.ringcentral.com/office/features/voip/overview.html"},{"@type":"CreativeWork","name":"Prepare your organization's network for Teams","url":"https://learn.microsoft.com/en-us/microsoftteams/prepare-network"},{"@type":"CreativeWork","name":"VoIP Network Requirements: Bandwidth, QoS, and Infrastructure","url":"https://www.ipcomms.net/blog/voip-network-requirements/"},{"@type":"CreativeWork","name":"How to Calculate Bandwidth for Cisco IP Calls","url":"https://www.cbtnuggets.com/blog/technology/networking/how-to-calculate-bandwidth-for-cisco-ip-calls"},{"@type":"CreativeWork","name":"What is an analog telephone adapter (ATA)?","url":"https://www.techtarget.com/searchunifiedcommunications/definition/analog-telephone-adapter"},{"@type":"CreativeWork","name":"What VoIP devices do you need for VoIP service?","url":"https://www.ooma.com/blog/home-phone/what-voip-devices-do-you-need-for-voip-service/"},{"@type":"CreativeWork","name":"Power over Ethernet","url":"https://en.wikipedia.org/wiki/Power_over_Ethernet"},{"@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":"How to Move Voice Services to the Cloud: The Best Practices","url":"https://www.atlantech.net/blog/how-to-move-voice-services-to-the-cloud"}]}}}