April 15, 2012

Free Voip Phone Calls - Voip Technology is Explained in information

VoIp is a break straight through invention which lets you make free or very cheap local, long distance and international calls. You may have a few questions in your mind such as how VoIp works, what are the benefits of VoIp.

VoIp connection with Computers and Networks.

Put VoIp aside for now and lets start learning about computer networking, you may have heard about computers, networks, switches and wireless networks. Computers spin with each other via a set of copper wires, fiber optic cables and wireless spectrum waves. Computer transportation takes place in the form of data. For example if you are sending an email to man that email is converted into data packets which are transmitted over the network of computers, switches and routers and when transmitted packets arrives at destination these are again converted back into email. This whole process takes less than few milliseconds to complete. That is how a computer network transportation takes place.




VoIp is very similar to computer data transportation in nature therefore it is leading that you understand how computer data network works.

How VoIp works and how a VoIp call is transmitted over data networks?

Now since we have discovered how computer data network functions therefore it will be easier for us to grasp how VoIp works. VoIp stands for (Voice over Internet Protocol), VoIp calls feel and sounds no distinct than a accepted Pstn call. The only distinction is that the VoIp calls are transmitted over computer data networks rather than Pstn exchanges.

When we make a VoIp call, a transportation channel is established in the middle of caller and called party over Ip (Internet Protocol) which runs on top of computer data networks. A telephony conversation that takes place over VoIp are converted into binary data packets streams in real time and transmitted over data network, when these data packets arrive at the destination these are again converted into accepted telephony conversation. This whole process of voice conversion into data, transmission and data conversion into back voice conversation takes place within less than few milliseconds. That is how a VoIp is call is works over data networks. I hope that now you understand basics of how a VoIp call takes place.

What are speech codec's and what role codec plays in VoIp?

Speech codec play a vital role in VoIp and codec determines the quality and cost of the call. Let me elaborate you what exactly VoIp codec's are and how they work. You may have heard about data compression, or probably you have heard about air compressor which compresses a volume of air in enclosed container, VoIp codec's are no distinct than a air compressor. Speech codec's compresses voice into data packets and decompresses it upon arrival at destination. Some VoIp codec's can compress huge number of voice while maintaining QoS which means use this type of codec will cost less because it will consume just a fraction of data network. Some codec's are just not capable of encoding huge number of voice they naturally consume huge number of data networks bandwidth hence the cost goes up.

Following is a list of VoIp codec's along with how much data network bandwidth they consume.

* Amr Codec

* BroadVoice Codec 16Kbps narrowband, and 32Kbps wideband

* Gips family - 13.3 Kbps and up

* Gsm - 13 Kbps (full rate), 20ms frame size

* iLbc - 15Kbps,20ms frame size: 13.3 Kbps, 30ms frame size

* Itu G.711 - 64 Kbps, sample-based Also known as alaw/ulaw

* Itu G.722 - 48/56/64 Kbps Adpcm 7Khz audio bandwidth

* Itu G.722.1 - 24/32 Kbps 7Khz audio bandwidth (based on Polycom's Siren codec)

* Itu G.722.1C - 32 Kbps, a Polycom extension, 14Khz audio bandwidth

* Itu G.722.2 - 6.6Kbps to 23.85Kbps. Also known as Amr-Wb. Celp 7Khz audio bandwidth

* Itu G.723.1 - 5.3/6.3 Kbps, 30ms frame size

* Itu G.726 - 16/24/32/40 Kbps

* Itu G.728 - 16 Kbps

* Itu G.729 - 8 Kbps, 10ms frame size

* Speex - 2.15 to 44.2 Kbps

* Lpc10 - 2.5 Kbps

* DoD Celp - 4.8 Kbps

What are VoIp Devices, VoIp Phones and VoIp Pbx?

VoIp expedient are mini computers, they include Cpu, Memory (Ram), Rom, Software, Operating Systems, Speech Codec's and they are customized to work as VoIp device. These devices are responsible for converting voice conversation into data streams, data compression, decompression, transmission, ring tones, bells and etc,. In order to use VoIp devices you will need to connect your accepted Pstn, or a cordless phone to make and receive calls.

VoIp phones are no distinct than a VoIp device, they include VoIp expedient plus a built-in phone, as explained above VoIp phone also contains Cpu, Memory (Ram), Rom, Software, O/S and codec's. Some VoIp phones also include a Lcd screen which you can use as a internet browser.

VoIp Pbx (Private subject Exchange) are mini telephone exchanges, VoIp Pbx are full computer server type hardware which contains Os, Fxs, Fxo, T1, Pri, E1 and various other telecommunication interfaces. Many VoIp Pbxs also contains all the above mentioned speech codec's which can be excellent as a beloved codec. VoIp Pbx can provides hundreds of features and extensions. To find out more about VoIp Pbx read the last paragraph of this article.

What role a VoIp supplier plays?

VoIp providers play a vital role with provisioning your internet phone service. They are responsible for terminating your voice calls to distinct VoIp and Pstn networks. VoIp providers have agreements and arrangements with other VoIp aid providers all over the world in distinct countries for exchanging, terminating and origination of VoIp and Pstn calls. Some VoIp providers will let you make free unlimited calls for a fixed number of money.

To find out which VoIp aid supplier is best superior to your needs please visit following website. VoIpbazar.com

What features are ready with VoIp Technologies?

Adsi On-Screen Menu System

Alarm Receiver

Append Message

Authentication

Automated Attendant

Blacklists

Blind Transfer

Call detail Records

Call transmit on Busy

Call transmit on No Answer

Call transmit Variable

Call Monitoring

Call Parking

Call Queuing

Call Recording

Call Retrieval

Call Routing (Did & Ani)

Call Snooping

Call Transfer

Call Waiting

Caller Id

Caller Id Blocking

Caller Id on Call Waiting

Calling Cards

Conference Bridging

Database Store / Retrieve

Database Integration

Dial by Name

Direct Inward ideas Access

Distinctive Ring

Distributed Universal number Discovery

Do Not Disturb

E911

Enum

Fax transmit and Receive (3rd Party Oss Package)

Flexible prolongation Logic

Interactive Directory Listing

Interactive Voice Response (Ivr)

Local and Remote Call Agents

Macros

Music On Hold

Music On Transfer:

- Flexible Mp3-based System

- Random or Linear Play

- Volume Control

Predictive Dialer

Privacy

Open village Protocol (Osp)

Overhead Paging

Protocol Conversion

Remote Call Pickup

Remote Office Support

Roaming Extensions

Route by Caller Id

Sms Messaging

Spell / Say

Streaming Media Access

Supervised Transfer

Talk Detection

Text-to-Speech (via Festival)

Three-way Calling

Time and Date

Transcoding

Trunking

VoIp Gateways

Voicemail:

- optical Indicator for Message Waiting

- Stutter Dialtone for Message Waiting

- Voicemail to email

- Voicemail Groups

- Web Voicemail Interface

Zapateller

VoIpbazar proudly promotes VoIp Technology and provides information how to make free or cheap calls to over 10,000 cities across the globe.

Free Voip Phone Calls - Voip Technology is Explained in information

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