Media5 Mediatrix 4104, Reference Manual

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Voice & Fax Codecs Reference Manual (SIP Version)
Mediatrix 4104 79
The Mediatrix 4104 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 15 - Voice Transmissions” on
page 229 .

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
Table 56: 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 83 for more details.
Voice Activity Detection (VAD) The Mediatrix 4104 supports the annex B. Annex B is the built-in support
of VAD in G.729. See
“G.729 Codec Parameters” on page 83 for more
details.
Standards Supported • draft-choudhuri-sip-info-digit-00.txt
• ITU-T Recommendation Q.24 : Multifrequency push-button
signal reception
• 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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