ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

What is Delay in VoIP?

Updated on October 2, 2012
Delay in VoIP Calls
Delay in VoIP Calls | Source

Taking into Account VoIP Delay

The Internet is a very different network from the traditional PSTN phone system. The fundamental philosophy varies in that the latter is based on a technology known as circuit switching. Circuit switching believes that a connection between two nodes excludes all other traffic. This results in a dedicated connection. Of course, the number of connections is always limited which is why sometimes and especially in the early days people would get notifications saying that the route is busy and that they should try again after some time. The benefit however is that once a connection is made it is always rock solid and reliable. It is not affected by any other activity over the network.

The Internet on the other hand believes in maximum throughput. Every connection is utilized by any application that can do so. This means that if you place a telephone call over the Internet, the same connection will be shared by many other Internet enabled services running on your system. This is of course the reason why you can to multiple things at the same time on your computer such as downloading a file, sending an e-mail and also chatting on IM. This flexibility however has a price. If you're not careful, other applications can hog the bandwidth that is necessary for VoIP to run smoothly. In addition, it also introduces a small amount of lag and latency which is the bane of VoIP calls.

How to Minimize VoIP Delay

VoIP delay can be caused by several factors. To start off with, it's important that you have sufficient bandwidth to make sure that your VoIP calls are received and transmitted quickly enough. Home users will not face too much of a problem because contrary to expectations, it doesn't require too much bandwidth at all. If you have 128K bps incoming and outgoing, this is enough to keep Internet voice services running smoothly. Businesses however don't have it so easy because the amount of bandwidth required scales with the number of concurrent calls at any given time. So IT administrators have to constantly keep an eye out for how much bandwidth is being consumed by VoIP and ensure that there is always enough.

Other factors such as lag and jitter cause delays as well and can be improved with better equipment and proper Quality of Service or QoS rules. Another factor that can possibly affect VoIP latency or delay is the distance from where the call is being made to the closest SIP data center. Since all hosted PBX VoIP calls are routed through these data centers, the round-trip times may cause a noticeable lag. If you live in Boston for example, try and ensure that you get an SIP provider with Boston VoIP systems in place so that your VoIP traffic doesn't have to travel too much.

Contact your Internet telephony service provider or ITSP to find out what VoIP clients you should use and what configurations are best. It would be preferable if they have multiple data centers scattered throughout the country so that the server closest to you can be used thus reducing the amount of VoIP delay.


    0 of 8192 characters used
    Post Comment

    No comments yet.


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, 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:

    Show Details
    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 or domains, for performance and efficiency reasons. (Privacy Policy)
    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)
    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.
    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)