ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

Voice Quality in VoIP Calls

Updated on June 20, 2013

Defining VoIP Quality

A "good" quality telephone conversation is defined differently by various people. Which is why in order to get a quick overview of the quality of VoIP calls, you are simply asked to rate it on a four or five star scale. Nevertheless, it is possible to break down the concept of quality into various factors. We can talk about latency, breaks in the flow, loss of audio, and the actual reproduction of the voice itself. Different aspects of the network are responsible for determining the overall quality of a VoIP call.

The first thing to ensure is that you have sufficient bandwidth for VoIP. In today's broadband connected world, this will almost certainly not be a problem – at least in a home environment. When you're talking about a business however there may be many employees talking at the same time and the bandwidth requirements increase dramatically. Your IT administrator needs to create a separate VLAN to ensure that there is always enough bandwidth for voice calls to go through even when many people are using the system simultaneously.

Latency is another big issue. In regular conversation, the maximum tolerance for latency is around 300 ms round-trip time. But since you don't have much control over most of the parts, you need to reduce it at your end as much as possible. Having VoIP data centers close to your location and minimizing the number of steps that it has to jump through will help.

VoIP Call Quality
VoIP Call Quality | Source

Selecting a Quality Audio Codec

A hosted VoIP phones service will be able to provide you with a wide range of audio codecs to choose from. The regular PSTN codec samples your voice at 8 kHz which cuts off quite a large number of higher and lower frequencies. This makes it impossible to accurately reconstruct your voice which leads to problems such as being unable to distinguish between various fricative consonants. With VoIP, you can select a much higher quality audio codec that samples your voice at 16 kHz instead. It provides a much more accurate reproduction that is a pleasure to use and is difficult to let go once you've gotten used to it.

The true magic of a VoIP call comes when all of the components are working together perfectly. If even one of them is off, it can spoil the overall call quality. Sufficient bandwidth, good quality codecs, and low latency together combine to produce a sound quality that is far superior to anything that the PSTN phone system can compare to. Contact your SIP service provider for help in properly setting up your network. After all, they not only have a lot of experience with this, it's in their best interests to ensure that your infrastructure is working smoothly. Unlike with the regular telecom industry, there is a lot of competition in the VoIP marketplace and you can pick and choose your service provider as per your requirements.

Comments

    0 of 8192 characters used
    Post Comment

    • Zubair Ahmed profile image

      Zubair Ahmed 

      5 years ago

      Nice hub and real good info, thank you for sharing. Yes you are correct VOIP is improving and how good the voice sounds at each end depends on many factors which you have nicely provided.

    working

    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: https://hubpages.com/privacy-policy#gdpr

    Show Details
    Necessary
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
    Features
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Marketing
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Statistics
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)