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There’s no question that voice over Internet protocol (VoIP) has become a standard tool for many companies. That’s owing to its promise of lower costs and the ability to substantially broaden the scope of what users can do with their telecommunications, says Riaan Pietersen, chief marketing officer Tele-Enterprise.
But how often have users connected a VoIP call, only to have it suffer from jitter, lag or latency, or even fail to connect at all? Chances are, users are nodding their heads right now. That’s because this sort of thing continues to plague some VoIP services, making a red-headed stepchild of the entire concept.

But throwing the baby out with the bathwater is no solution. VoIP continues to hold sway because when done right, it delivers call quality which is every bit as good as that of a hard-wired, copper circuit. The trick is that users need to be sure that every time they pick up the phone, the quality of the call is consistently that good.

However, while a service provider will tell users that this is what they can expect, they probably still have a worry lurking in the back of their minds.
“But if the service providers say it’ll work perfectly, how come sometimes when I connect calls over VoIP, the quality is poor?”

Yes, it happens. The reasons largely fall into three shortcomings:
* VoIP services which are implemented with limited pre-installation assessment of the complete network and office environment;
* Use of sub-standard VoIP equipment such as gateways, connectivity mediums and routers; and
* Inadequate or no assessment of call performance after implementation.

Assessment is absolutely critical because data networks weren’t originally designed to carry voice traffic. The Internet has always worked on the concept of “best effort”; with “ordinary” data, it doesn’t matter if some parts of a file arrive after others, in any old order. With voice (or video), lose some parts and suddenly you develop a digital stutter and communication goes out the window.

These sorts of issues are more likely to confront the small to medium business than they are to strike large corporations (though these are far from immune).

That’s because SMB networks typically don’t have the throughput capacity that bigger companies enjoy. When taking into account that VoIP traffic uses around 10 times more capacity than data traffic … well, users don’t need to be network engineers to appreciate how that translates into dodgy call quality.

Add in some congestion, such as concurrent calls or simply the combination of data and voice going into the same pipe, and things can very quickly go pear-shaped.

Is it just a bandwidth problem, then? Bandwidth is certainly the first port of call, but there is more to it than that. A mere assessment of capacity as a measure of the ability for any given network to carry perfect VoIP calls is just the starting point.

If calls are to be consistently good (and only excellent is good), the service provider should demonstrate an understanding of the necessity for a live network assessment of the entire LAN and WAN paths. This is a necessary first point in understanding network readiness to successfully implement VoIP – or any realtime media application, for that matter.

The service provider should absolutely start with the process of thoroughly analysing your network. If VoIP isn’t going to fly, there’s no point in “investing” in it; users all know that unless a call is clear, latency and jitter-free, it simply isn’t good enough to communicate over.

Another crucial part of success is the onsite equipment used to terminate voice calls through your service provider’s telecommunications network. Many providers use cheap data routers and gateways, with contended (many users of the same channel) connectivity mediums to save costs. Simply put, this causes poor call quality.

Once it is established that the network can handle it and the VoIP system is in place, it should be stress-tested, constantly monitored with onsite probes and managed to ensure consistent performance.

After all, among the benefits of digital technology is that records are generated as a matter of course; these provide the necessary data to understand what’s happening and how – the raw material to identify and eliminate any challenges before they interrupt conversations.