Seek Voip

The basic principle behind VoIP technology is that digital signals travel much faster and more efficiently than analog signals. Traditional phones convert human speech into electric signals and back into sound in a continuous cycle, with the voice staying in analog form throughout the session. For signals to travel over an Internet connection, they must be in digital form, which is what VoIP does. A VoIP-enabled phone converts analog voice signals into digital signals that travel several times faster and reach the other line without losing quality along the way.

Existing telephone networks connect calls using a method called circuit switching. In a circuit-switching line, a circuit is opened every time someone picks up the receiver to answer a call. This circuit remains open throughout the duration of the call, maintaining a continuous flow of signals. During dead air, or the brief intervals between each exchange, data continues to travel along the circuit, most of which is wasted since no sound reaches either end. This data wastage results in an expensive but unnecessarily slow connection.

VoIP solves this problem by employing a new method called packet switching. Packet switching is a selective type of transmission – it captures only the signals which contain audio information and leaves out the blank signals, or the ones emitted during dead air. The result is that the signals are more compact, making them travel faster over the Internet line.

Packet switching works by dividing the signals into small parts called “packets” and sending them on different routes toward the other line. This is because a large signal traveling in a single route can clog the path and slow itself down, and a lot of data can be lost during the delay. Packet switching automatically selects the fastest and least congested route for each packet. Unlike circuit switching lines, which stay open throughout the conversation, packet-switched lines open intermittently, just long enough to send one packet at a time. Each packet is loaded with information telling the routers where to send them, and instructions telling the receiver's computer how to reassemble the packets into their original form.

In a VoIP call, the phones or computers of both parties are alerted to expect data packets, preparing them for a series of packet exchanges. This is the same method used in other Internet applications such as email or instant messaging, which is why VoIP calls are recognized as regular web activities rather than telephone calls. During the call, the phones (or ATA adapters if a traditional phone is used) decode each packet and reassemble them into the large digital signal they originally formed. Finally, this signal is converted back into analog form and is played back as human speech.