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Voip Phones


What is a VoIP Phone?

Your VoIP service is only part of the solution

You want the best possible VoIP calling experience. But it’s not just about your VoIP service.

Your VoIP phone plays a large part in a quality calling experience.

That’s why it is important for you to read the FREE information found here. Learn more about a Voice over IP phone and the technology that powers it right now in only a few minutes.

In fact, how about we get right into what is a Voice over IP phone.

You understand that it is different from the dial up phones. But to understand where it is different is not that difficult .

It is a telephone where IP technologies and transport protocols are utilized in combination with VoIP service to make calls. It may look like a traditional telephone though a different technology (IP) is implemented.

IP…I’ve heard of that before

That’s right. If you think you’ve heard the term IP before it’s because you have. IP stands for Internet Protocol, a method of transporting packets across your Local Area Network (LAN) and or Wide Area Network (WAN).

This is the same technology utilized by your data network to send and receive information.

It is also where the term VoIP comes from. VoIP stands for Voice over Internet Protocol and is the widely used term associated with the sending over voice calls over a network.

Now that you know what a VoIP phone is how about we explore how it works?
How does the magic inside a Voice over IP phone work?

It would be great to tell you that there is some sort of magic behind the way an IP phone works. But, there’s no need to prepare to be amazed. A VoIP phone is actually a simple device.

It works by taking your analog voice and converting it into digital packets that are then transmitted across a network using. VoIP phones can also convert digital packets in analog voice streams.

To accomplish this conversion and transfer of voice stream a Voice over IP phone uses specific set of VoIP protocols and voice codec’s.

This is usually the part where you get a little squeamish. Before you go grabbing that bag located in the seat back in front of you take a deep breath.

Voice protocols and voice codec’s are rather easy to stomach.

Let’s keep turbulence to a minimum.

You might not be technical, but you still need a basic understanding of the VoIP protocols and codec’s. Without them you’d be in for one bumpy ride.

This is because protocols and codec’s play an important role in ensuring system compatibility and call quality. Without going into great detail…

A VoIP protocol determines how your voice packet is transported across a network. A VoIP phone will typically support one protocol.

The most popular VoIP protocols are
:
  • SIP (Session Initiation Protocol) – SIP is a standards-based protocol that is used and supported by the vast majority of VoIP phone systems and services.
  • SCCP (Cisco Skinny Client Control Protocol) – SCCP is a proprietary protocol used by Cisco’s Call Manager and Cisco IP phones.
  • MGCP – MGCP is an older VoIP protocol you might come across. It is not widely used and or supported.
  • H.323 – Similar to MGCP, H.323 is an older VoIP protocol that you might come across, but is no longer widely used and or supported.
A voice codec is responsible for the conversion of your analog voice stream into a digital packet. Voice codec’s also determine sound quality and bandwidth required to send the packet. A VoIP phone typically supports multiple voice codec’s. The most common voice codec’s are:
  • GSM – 13 Kbps
  • iLBC – 15 Kbps
  • G.711 - 64 Kbps
  • G.722 - 48/56/64 Kbps
  • G.726 - 16/24/32/40 Kbps
  • G.728 - 16 Kbps
  • G.729 - 8 Kbps
See that wasn’t too bad. As long as you make sure your VoIP phone system and VoIP phone support the same protocols and codec’s you should be in for a smooth ride.

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