Medias Mediatrix 1204, Справочное руководство

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Voice & Fax Codecs Reference Manual (SIP Version)
Mediatrix 1204 87
G.723 Codec Parameters
The following are the G.723 codec parameters you can set.
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To set the G.723 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.723 section, enable the G.723 codec by selecting the proper value in the G.723
drop-down menu.
Figure 41: Telephony – G.723 Section
3. Set the minimum and maximum packetization time values for the G.723 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.723 codec. Authorized
values start at 30 ms and come in discrete steps of 30 ms up to the one specified by
the corresponding
Maximum drop-down menu.
• Maximum : Longest packetization period allowed for the G.723 codec. Authorized
values go up to 120 ms, in discrete steps of 30 ms, and start at the one specified by the
corresponding
Minimum drop-down menu.
4. Click Submit if you do not need to set other parameters.
G.726 Codecs Parameters
The following are the G.726 codecs parameters you can set. There are sections for each type of G.726 codec.
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To set the G.726 codecs 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 one or more of the Voice - G.726 sections, enable the corresponding G.726 codec by selecting
Enable in the G.726 choice.
Figure 42: Telephony – G.726 Section
3. Set the G.726 actual RTP dynamic payload type used in an initial offer in the G.726 Payload Type
field.
The payload types available are as per RFC 3551. The values range from 96 to 127. The default
values are as follows:
• G.726 16 kbps: 97.
• G.726 24 kbps: 98.
Caution:
The Mediatrix 1204 cannot use G.723 and G.726 at the same time due to memory size limitation.
You must restart the Mediatrix 1204 when enabling or disabling these two codecs. If both G.723 and G.726
are enabled when you restart the Mediatrix 1204, G.723 is the codec used.
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Caution:
The Mediatrix 1204 cannot use G.723 and G.726 at the same time due to memory size limitation.
You must restart the Mediatrix 1204 when enabling or disabling these two codecs. If both G.723 and G.726
are enabled when you restart the Mediatrix 1204, G.723 is the codec used.
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