Medias Mediatrix 1204, Reference Manual

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Chapter 5 - Web Interface – Telephony Voice & Fax Codecs
82 Mediatrix 1204
The Mediatrix 1204 supports G.729A and G.729AB for encoding and G.729, G.729A and G.729AB for
decoding.
General Parameters
The following are the general codecs parameters you can set.
You can also set these parameters via SNMP, as described in “Chapter 16 - Voice Transmissions” on
page 199 .
X
To set the general codecs parameters:
1. In the web interface, click the Telephony link, then the CODEC sub-link.
Figure 38: Telephony – CODEC Web Page
2. Select to which port you want to apply the changes in the drop down menu at the top of the window.
3. In the General section, choose the preferred codec you want to use in the Preferred Codec field.
This is the codec you want to favour during negotiation. You have the following choices:
• g711-PCMU
• g711-PCMA
• g723
• g729
• g726-16kbps
• g726-24kbps
• g726-32kbps
Table 51: G.729 Features
Feature Description
Packetization time Range of 10 ms to 100 ms with increment of 10 ms. See “G.729 Codec
Parameters” on page 86 for more details.
Voice Activity Detection (VAD) The Mediatrix 1204 supports the annex B. Annex B is the built-in support
of VAD in G.729. See
“G.729 Codec Parameters” on page 86 for more
details.
Standards Supported • draft-choudhuri-sip-info-digit-00.txt
• RFC 2833: RTP Payload for DTMF Digits, Telephony Tones
and Telephony Signals
• RFC 1890 – RTP Profile for Audio and Video Conferences
with Minimal Control
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