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Latency in VoIP

Updated on November 20, 2012
Problems with VoIP Latency
Problems with VoIP Latency

Causes of VoIP Latency

Even though VoIP is based on the Internet, it shares little in common with most web applications. This is because unlike the loading of a webpage, VoIP is a real-time protocol. This means that two people on a VoIP call need to be made aware of each other's responses immediately and without delay. While you may not notice or even care about the delay while loading an image on a webpage, even a few tens of milliseconds is enough to spoil your VoIP experience. Because of this, it faces special problems when it comes to implementation.

When a person's response doesn't reach the other end in a timely manner, this is known as latency. There are many causes of latency in a VoIP network. The most common and most easily understandable is a problem with the Internet connection. It may not be a question of bandwidth – though that is certainly possible. Most of us have more than sufficient bandwidth to accommodate VoIP calling. But sometimes other applications interfere with our experience. If for example you are downloading a large file and making a VoIP call at the same time, you will receive extremely poor performance because the file downloading operation is using up all your bandwidth in the background.

Configurations for Low Latency

Many latency problems can be traced to poor configurations either at the level of the VoIP client or in your network. You must ensure that whatever router you are using is implementing proper Quality of Service or QoS rules to ensure that VoIP network traffic receives priority over others. Depending on the type of VoIP service you are using, there are many tiny optimizations in your VoIP client that can significantly reduce or even eliminate latency.

Try and obtain local Philadelphia PBX services for your VoIP needs. After all, the less the distance a packet has to travel from one point to the other, the faster it will reach its destination. Contact your Internet telephony service provider to find out what settings are best to use with their service. They will be better able to help you out than anyone else in this regard since they know the ins and outs and all the quirks of their system.

Most good SIP VoIP providers have instructions on their website on how to configure the various popular VoIP clients in use on your smart phone. If however you are using the facility of automatic provisioning, your VoIP phones will automatically dial into the server and configure themselves. For a business, this is the best way to reduce hassle and obtain the best VoIP experience possible.


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