No, your telephone service will change over without any interruption; all you will notice is a reduction in your telephone bill. All transfers are made on a "like for like" basis, so you can expect to keep exactly the same services you currently have.
We only work with hardware which has been put through rigorous testing so we can guarantee call quality. All our cards come with echo cancellation modules to ensure quality over PSTN connections. With VoIP, call quality depends on the quality of your Internet connection and we can advise you on this area.
Once your Broadband is activated, it takes 10 days for the speed and the connection to stabilise at your local exchange. During this time, you will notice the speed of the broadband fluctuating. Once the stabilisation period is over, the speed settles down, and gets to the maximum possible through your exchange.
VoIP has already been around for many years and has now become an attractive alternative to traditional PSTN connections. We however realise that your phone system is a key component of your business and must be reliable. This is why we encourage customers who can not guarantee that their Internet connection will be stable to have a fall back solution such as a PRI or BRI connection.