From
http://www.voip-architecture.com/
VoIP generally work on the established methods of sending packed digitized data over the internet. TCP/IP networks are made of IP packets containing a header (to control communication) and a payload to transport data: VoIP use it to go across the network and come to destination. While sending information analog data is digitized with the help of an ADC (analog to digital converter), transmitted and then at the other end the data is again transformed in analog format with DAC (digital to analog converter) to use it. VoIP also works in very similar manner. VoIP digitalizes voice in data packets and then sends them to the destination and reconverting them back to voice at destination.
Voice at the Source -> Digitized using ADC -> sent over Internet -> Digitized Data Received at Destination -> Data is reconverted to Voice using DAC.
During a blackout a regular phone is kept in service by the current supplied through the phone line. This is not possible with IP phones, so when the power goes out, there is no VOIP phone service. In order to use VoIP during a power outage, an uninterruptible power supply or a generator must be installed on the premises. It should be noted that many early adopters of VoIP are also users of other phone equipment such as PBX and cordless phone bases that also rely on power not provided by the telephone company.
ReplyDeleteDo you know how many bits are in a conventional PCM voice sample or what "look-ahead" used for? VOIP got these complex GUI which makes me confused on how to use its functions.
ReplyDeleteThanks for sharing your info. I truly appreciate your efforts and I am waiting for your next post thank you once again.
ReplyDelete