Very frequently when researching small business telephone systems, potential clients are curious as to exactly how much bandwidth they will need to utilize a hosted virtual PBX solution. While many on-site small business telephone systems can operate without any problems within the company’s existing network architecture, bandwidth and connection speeds become a factor when choosing a hosted solution.
To begin with, we should point out that bandwidth refers to the ability to transfer packets of data from one location to another in a specified time frame. In the case of hosted small business telephone services, the “data” refers to voice packets transferred over the VoIP system from one caller’s location to another. Obviously, the higher the speed of your bandwidth, the faster your transfer rate will be and subsequently call quality is affected in a positive manner.
When we discuss bandwidth, we actually refer to two separate processes of transfer: upload and download bandwidths. Obviously, upload speeds denote the amount of transfer you send into the internet (or in this case VoIP system) and download speeds refer to the speed of transfer pulled from the internet. When it comes to speed for a hosted virtual PBX system, generally the higher the bandwidth speeds, the better.
In the case of VoIP technology, generally calls will utilize around 90 kilobits per second of data transfer. In the case of today’s high speeds offered by most internet service providers, it’s rarely an issue to reach the capacity to handle calls. However, if you’re planning on having multiple users on your system simultaneously or are not able to get adequate bandwidth speeds due to location (such as remote locations that require wireless or microwave ISP connections), you do have an option. With most VoIP systems, you are able to reduce the bandwidth required for calls by lowering the sound quality settings within the system. This can often reduce the transfer rate required to run the hosted small business telephone system to 60 kilobits per second, or even 30 if necessary. In general, system users won’t notice a drastic decrease in call quality by modifying these settings. When possible, it is best, however, to leave your system at the default setting on 90 Kbps if you’re able to receive high bandwidth speeds form your ISP.
So what are the minimum ISP connection speeds to run a VoIP system as your small business telephone technology? In general, you’ll need to at least seek out a cable or DSL connection to effectively run your system. In some areas, you can employ a T1 connection, however, for the average small business this is not cost effective when a simple cable internet plan will suffice at a much cheaper monthly rate (around $100 as compared to $300 and up for a T1 connection). Lower end DSL plans begin at around 128k of bandwidth while cable connections generally offer a minimum speed of 600k. Obviously, the cable plans are a little more expensive, but offer a faster connection to enhance call quality and volume capacity.
If you’re concerned about what options are available in your area, begin by researching ISPs in your town. This is important prior to seeking out a virtual PBX provider. Once you find an ISP with adequate speeds, you’ll be able to seek out a small business telephone provider that will meet the unique demands of your small business.



