User's Manual

5. Which Codec Should I Choose?
As which codec choice is depending on what codec is supported on both end of the VoIP host.
Generally a codec with low bandwidth consumption and high voice quality is a good codec
.
6. How do I know that the call quality is good?
Technology advances in IP telephony transportation have made Internet calling as good as or
better than normal PSTN connections. This is mostly effective for high speed Broadband
connections, whereas dial up services have some way to go before delivering the quality of
PSTN calling.