Chapter 5 - Web Interface – Telephony
Voice & Fax Codecs
86
Mediatrix 1204
G.729 Codec Parameters
The following are the G.729 codec parameters you can set.
X
To set the G.729 codec parameters:
1.
Select to which port you want to apply the changes in the drop down menu at the top of the window.
2.
In the
Voice - G.729
section, enable the G.729 codec by selecting
Enable
in the
G.729
choice.
Figure 40:
Telephony – G.729 Section
3.
Set the minimum and maximum packetization time values for the G.729 codec in the corresponding
drop-down menu.
The packetization time (also called packetization period or ptime) is the duration, in ms, of the voice
packet.
•
Minimum
: Shortest packetization period allowed for the G.729 codec. Authorized
values start at 10 ms and come in discrete steps of 10 ms up to the one specified by
the corresponding
Maximum
drop-down menu.
•
Maximum
: Longest packetization period allowed for the G.729 codec. Authorized
values go up to 100 ms, in discrete steps of 10 ms, and start at the one specified by the
corresponding
Minimum
drop-down menu.
4.
Enable the G.729 Voice Activity Detection (VAD) by selecting
Enable
in the
G.729 VAD
choice.
VAD defines how the Mediatrix 1204 sends information pertaining to silence. This allows the unit to
detect when the user talks, thus avoiding to send silent RTP packets. This saves on network
resources. However, VAD may affect packets that are not really silent (for instance, cut sounds that
are too low). VAD can thus slightly affect the voice quality.
G.729 has a built-in VAD in its Annex B version. It is recommended for digital simultaneous voice
and data applications and can be used in conjunction with G.729 or G.729 Annex A. A G.729 or
G.729 Annex A frame contains 10 octets, while the G.729 Annex B frame occupies 2 octets. The
CN packets are sent in accordance with annex B of G.729.
5.
Click
Submit
if you do not need to set other parameters.
2
3
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Summary of Contents for Mediatrix 1204
Page 6: ...Mediatrix Telecom a Division of Media5 Corporation Reference Manual...
Page 26: ...Preface About this Manual End User Technical Support xxvi Mediatrix 1204...
Page 27: ...Installation and Web Page Configuration...
Page 28: ...Page Left Intentionally Blank...
Page 50: ...Chapter 1 Installation Verifying the Installation 24 Mediatrix 1204...
Page 98: ...Chapter 4 Web Interface SIP Parameters SIP Authentication 72 Mediatrix 1204...
Page 127: ...SNMP Configuration...
Page 128: ...Page Left Intentionally Blank...
Page 162: ...Chapter 8 IP Address and Network Configuration Ethernet Connection Speed 136 Mediatrix 1204...
Page 170: ...Chapter 9 SIP Servers Presence Compositor Server 144 Mediatrix 1204...
Page 174: ...Chapter 10 DNS SRV Configuration DNS SRV Oriented Settings 148 Mediatrix 1204...
Page 196: ...Chapter 12 Configuration File Download Configuration File Example 170 Mediatrix 1204...
Page 220: ...Chapter 14 Gateway Configuration Detecting a Far End Disconnect 194 Mediatrix 1204...
Page 240: ...Chapter 16 Voice Transmissions User Gain 214 Mediatrix 1204...
Page 288: ...Chapter 23 Telephony Attributes Delayed Hot Line 262 Mediatrix 1204...
Page 294: ...Chapter 25 Quality of Service QoS VLAN 268 Mediatrix 1204...
Page 298: ...Chapter 26 Syslog Daemon Syslog Daemon Configuration 272 Mediatrix 1204...
Page 302: ...Chapter 27 Statistics RTP Statistics 276 Mediatrix 1204...
Page 319: ...Appendices...
Page 320: ...Page Left Intentionally Blank...
Page 332: ...Appendix B Standard Hardware Information Warranty 306 Mediatrix 1204...
Page 336: ...Appendix C Cabling Considerations RJ 11 Telephone Cable 310 Mediatrix 1204...
Page 372: ...Appendix E Glossary Wide Area Network WAN 346 Mediatrix 1204...
Page 390: ...Index W 364 Mediatrix 1204...