But many people have found out that not all high-speed Internet connections are the same. The most available Internet connections at this time fall into four groups:
DialupDSLCableFiber optics
VOIP phones use approximately 80 KB/s in each direction when a call is active. You use almost no bandwidth when they are idle. So, the first consideration for any VOIP system is the full range available. In a typical small office where no more than 5 phones always in use are at once, the required bandwidth would be up to 400 KB / s and 400 KB / s down.
But this may be not your only concern; You can also have computers to use the same Internet connection for Web surfing and e-Mail traffic. Computer traffic bandwidth varies from next to nothing to display a Web page very high download software, music or videos. And by sending an email with a large attached photo available bandwidth to almost zero.
When that happens, phone is very jerky movement, displayed with outbreaks of silence under the words.
So, no matter what type of Internet connection you have, you need to can restrict the bandwidth, the computer draw. This means that some sort of rate limiting switch between your Internet connection and the computer at work is to be connected. (VOIP phones have not so limited because they no matter draw which does not exceed 80 KB / s.)
With VOIP-installations the preferred connection would fiber, with a typical range of 10-20 MB / s direction in the following-up and down. The computers on 2 MB limit and they will hardly notice.
The second best type of connection is usually cable, where bandwidth 10 MB / s down and 2 MB / s up together. The computer on the line should be on 2 MB down and 500 kb to limited. Again, they'll find hardly any reduction.
DSL connections get very risky. DSL providers often use DSL modems that contain a system called SIP ALG (application level gateway) (by default). The implementation of the SIP ALG has been very badly done, and may often cause problems with VOIP telephones. Typical problems range from no connectivity to intermittierenden call drops and a variety of other systems. There is a list of modems with this problem on http://www.voip-info.org/wiki/view/Routers+SIP+ALG. If these modems one and see no problems with your VOIP service, call your DSL provider and ask for, that they SIP ALG. disable
DSL connections suffer from bandwidth problems because they are usually asymmetric (sold as ADSL). These connections can up to 2 MB / s download speeds, but only 500 KB / s or even 256 KB / s upload to have. If you had to pay attention earlier in this article, you can see that is a link for 256 K only 3 simultaneous calls IF NO TRAFFIC is used by computers ON THE LINE supported is.
The bottom line: If you're thinking of installing VOIP and an ADSL connection, check everything out thoroughly, before any commitment.
Finally, there are dialup. Dial-up connections provide no more than 40 KB / s in each direction. A Word, they are not suitable for VOIP calls.
The moral of this story is this: If you problems with your VOIP system, first a look at your Internet connection. It is a rather perpetrators as your phone system or your VOIP provider. If you are considering only a move to VOIP, you get all the facts on your Internet connection before you call of even a VOIP provider.
William is Marketing Director for Business Phones.US, a provider of VOIP systems for small and medium-sized enterprises. For more information, visit his website at http://business-phones.us/. You can reach him via e-Mail at support@business-phones.us or by phone 1-866-553-3833. We welcome your questions about VOIP installations.
Business Phones.US is a division of Xantek, Inc., based in Las Vegas, Nevada, United States.
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