The Limitations of VoIP – Thus Using IICalls is Naturally Better

Posted on Sep 16,2011 By Admin

What Is VoIP? VoIP (Voice over Internet Protocol) is simply an alternative way of making calls. It is also referred to as Internet Telephony. The difference is that you do not necessarily need a telephone set to make calls, and the call is processed in a very different way than the conventional mobile or landline call. VoIP technology has become increasingly popular because it makes calling cheap, and sometimes even free. Before we go into the disadvantages and limitations of the VoIP technology, let us take a quick look at how it actually works.   The Anatomy of a VoIP Call VoIP was invented much earlier than you would believe. In 1973, ARPANET pioneered the capability of sending voice across a digital network. This was limited to the ARPANET network grid only but there is no doubt that the ARPANET people were the first ones to invent VoIP technology. The first VoIP transceiver was built and patented by a company called Vocal Tec (founded by Alan Cohen and Lior Harmaty) in 1989. Here is a simple explanation of how VoIP telephony works:

  1. First, voice is converted into digital format in the form of bits or packets of information
  2. These packets are compressed (to save space and bandwidth)
  3. The compressed data packets are sent over the internet (not in series but in a different order)
  4. Usually, the packets are sent multiple times to cope with packet loss along the way
  5. Once all the packets reach their destination, they are first streamlined, then converted back to voice and heard by the person on the other end

  The Drawbacks of VoIP We have listed eight glaring limitations of the VoIP technology Limitation 1 – No Power, No VoIP! VoIP phones, and their associated technology, run on electronic systems. Thus, if there is a power failure, the VoIP phone will not work. Limitation 2 –Call Quality Deterioration Packet loss is an integral part of internet data transfer and VoIP inevitably runs the risk of significant drops in quality. Voice quality deterioration can occur for a number of reasons: from packet loss (which is just about OK) to fluctuations in internet speed and slowing down of computer for of any other reason (which is certainly not OK!). Limitation 3 - Different VoIP Protocols Do Not Work Together There are a number of VoIP protocols in effect today, and any two different protocols do not work together. Thus, say if your phone is using protocol X, you can only make free or cheap calls to another phone using protocol X. And, if you are using VoIP software like Skype or I call, you can only call another person using the same software. Limitation 4 – Inability to Call Emergency Service Numbers Since VoIP phones cannot be located to a physical address, they may not work - or have limited capability - with short code numbers (like 911 in the US). Providers are trying to overcome this issue by assigning a physical address to the phone number, but there is still much to be resolved in this area currently. Limitation 5 – Low Internet Speed Means Bad VoIP VoIP technology requires high speed internet to work effectively. It works quite well with DSL/ADSL and Broadband, but the technology has shown poor performance on dial-up and satellite internet connections. Why does VoIP have issues with satellite internet? Because it needs a latency of less than 200 milliseconds, and satellite latency is more due to the length of time taken for the data to travel from earth to the satellite and back again. Limitation 6 – Degradation of Network Performance When Using VoIP VoIP requires a lot of bandwidth, and this can cause disruption to your other tasks or to other users on your network. Conversely, if you are already using lots of bandwidth for other tasks the ability and clarity of your VoIP call will not be good. Finally, a high speed internet connection is required at both ends to maintain a smooth VoIP call. Limitation 7 – A Number of Internet Issues Can Cause VoIP Havoc The way in which the internet works raises some inherent issues to VoIP.

  • Phase Jitter - the sporadic shortening and lengthening of signal – jitter disrupts VoIP data
  • Packet Re-ordering – packets do not arrive on the destination in the expected order –VoIP software gets confused and you get a breaking of voice
  • Packet Error - multiple packets of data get degraded on the way to the destination – degraded packets of voice data = degraded VoIP call
  • Packet Loss - some packets of data are inevitably lost along the way - VoIP signal bears the burden

Limitation 8 – Limited Connectivity on Cellular and Landline Phones in Multiple Countries A VoIP service provider will place certain restrictions on its service offering. This can include free local calls only, or free international calls to only a very limited number of destinations only, or indeed the calls may be limited to landline phones only. And even then, the call works best as a ‘VoIP phone to VoIP phone call’ or ‘VoIP software to VoIP software call’.   An Alternative to VoIP Calls There is great demand for cheap or free international calls

  • With crystal clear voice quality
  • With the ability to call virtually any international landline or mobile number
  • Which can be made right from the user’s mobile phone, irrespective of location in the UK
  • Which are not limited by weaknesses listed above for VoIP

IICALLS have come up with the perfect solution… So why waste any more time when you can MAKE FREE INTERNATIONAL CALLS FROM THE UK NOW!

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