SIP stands for "Session Initiation Protocol". A protocol that links phone numbers to IP addresses which allows VoIP users to call and receive calls using just phone numbers. Read More ...

It is recommended that a minimum of a 512/128 kbps connection is used for a single VoIP line. Any lower and the quality can drop, particularly if doing other things on your Internet connection simultaneiously such as downloading.
For more than one VoIP line, a rule of thumb is to allow around 128kbs upload per line. 128k works fine (using the light G.729 codec) for one line but when two lines try to use it you will find calls become crackly and the potential to dropout
Data consumed per call varies and is difficult to gauge accurately. Different codecs have different consumption rates, the length of calls vary and times where you're not actually speaking means that there's no data to transfer. For a very rough idea, one of the most popular codecs, G.729, has a consumption rate of just 8kbps which would roughly make a one minute phone call around 200 Kbytes once all the background traffic and so on is factored in, which means you'd manage several thousand of these theoretical one minute calls (or around 80 hours) to use one gigabyte of data. Read More ...

VoIP stands for "Voice over Internet Protocol" and is simply using your Internet connection to make and receive telephone calls rather than going through wires via a Telephone Exchange in the traditional manner. Read More ...

There is no Contract Term. You go Month by Month on Post Paid Accounts or You use until your credit runs out on your Pre-Paid accounts Read More ...