BreezeMAX Si 2000 CPE User Manual - Alvarion

Chapter 7 - VoIP Settings
Codecs
stream. This standard is used in Europe and most other countries around
the world.
» PCMU (G711.uLaw): The ITU-T G.711 with mu-law standard codec that
uses Pulse Code Modulation (PCM) to produce a 64 Kbps high-quality voice
data stream. This standard is used in North America and Japan.
» G723.1: The ITU-T G.723.1 standard low bitrate codec that uses Multi-
Pulse Maximum Likelihood Quantization (MP-MLQ) and Algebraic Code
Excited Linear Prediction (ACELP) speech coding to produce data streams
of 6300 and 5300 bps.
» G729ab: The ITU-T G.729ab standard codec that uses Conjugate
Structure Algebraic-Code Excited Linear Prediction (CS-ACELP) with
silence suppression to produce a low-bandwidth data stream of 8 Kbps.
Note that DTMF and fax tones do not transport reliably with this codec, it
is better to use G.711 for these signals.
» G726-16/24/32/40: The ITU-T G.726 standard codecs that use Adaptive
Differential Pulse Code Modulation (ADPCM) to produce good-quality,
low-bandwidth data streams of either 16, 24, 32, or 40 Kbps.
• Priority Codec List – The BreezeMAX Si 2000 automatically negotiates the
codec to use for each called party. You can specify a priority for the codecs
that you prefer to use. For example, you may want to use a low-bandwidth
codec such as G729ab instead of a high-bandwidth G711 codec. Select a codec
in the list, then use the UP and DOWN buttons to set the priority. The
BreezeMAX Si 2000 attempts to use the codec highest in the list before trying
the next lower one.
BreezeMAX Si 2000 CPE 96 User Manual