Enterprise VoIP
TalkSwitch VoIP Telephone Systems
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IP Telephony FAQ's:
Why are there two versions
of the G.711 CODEC?
This goes back to the development of digitized voice by the phone
companies. The U.S. and Japan have standardized on G.711 mu-law.
The European standard is G.711 a-law. They use slightly different
coding schemes.
What is Comfort Noise?
Most people are use to hearing a small but finite background noise
on phone calls. VoIP telephony has the ability to transmit complete
silence during pauses in conversations, which can falsely suggest
that the call has been dropped. A comfort noise generation function
or CNG artificially recreates that minute background noise.
