MyPBX U100&U200 Administrator's Guide
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a-law: A PSTN standard codec, used outside of North America, that provides
very good voice quality and consumes 64kbit/s in each direction (receiving and
transmitting) of a VoIP call.
GSM: A wireless standard codec, used worldwide, that provides adequate voice
quality and consumes 13.3kbit/s in each direction (receiving and transmitting)
of a VoIP call. GSM/UMTS is supported by many VoIP phones.
SPEEX: Speex is an Open Source/Free Software patent-free audio compression
format designed for speech. The Speex Project aims to lower the barrier of entry
for voice applications by providing a free alternative to expensive proprietary
speech codecs. Moreover, Speex is well-adapted to Internet applications and
provides useful features that are not present in most other codecs.
G.726: A PSTN codec, used worldwide, that provides good voice quality and
consumes 32kbit/s in each direction (receiving and transmitting) of a VoIP call.
G.726 is supported by some VoIP phones.
ADPCM, G.729A, H261, H263, H263p, H264.
Note: If you would like to use G.729, please enter your license.
6.7.3 Blacklist
Blacklist is used to block an incoming/outgoing call. If the number of
incoming/outgoing call is registered in the number blacklist, the caller will hear
the following prompt: “The number you have dialed is not in service. Please
check the number and try again”. The system will then disconnect the call.
Figure 6-61
We can add a number with the type: inbound, outbound or both
Figure 6-62
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