Altigen ACM 6.7, Руководство администратора

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Setting VoIP Codec Profiles
MAXCS ACM 6.7 Administration Manual 321
Name the new profile and click OK. Make your changes, and then click OK.
The next table describes the Codec fields.
Parameter Description
Codec Profile Table Lists codec profiles by name. Select a profile in the table to
modify its settings, then click Apply in the panel where you
made the changes.
Click the Add button to add a codec profile. Click the Remove
button to remove the selected profile. You cannot remove the
Default profile.
Name Name of the codec profile. You can modify the name, and click
Apply. The Default profile name cannot be changed.
Codec There are several options:
G.711 Mu-Law
Prefer G.723.1, support G.729
Prefer G.729, support G.723.1
G.711 A-Law
Prefer G.711 Mu-Law, support G.711 A-Law
Prefer G.711 A-Law, support G.711 Mu-Law
G.711 provides toll quality digital voice encoding, and G.723 and
G.729 use low rate audio encoding to provide near toll quality
performance under clean channel conditions.
G.711/G.723/G.729
Silence Suppression When silence suppression is enabled, and silence is detected
during a call, MAXCS stops sending packets to the other side.
This decreases the bandwidth requirement, however the voice
quality may be degraded slightly. These are system-wide
settings.
G.711/G.723/G.729
Jitter Buffer Range
(ms) Indicates the delay, in milliseconds, used to buffer G.711/
G.723/G.729 voice packets received from the IP network. Voice
packets sent over the IP network may incur different delays due
to network load or congestion. The jitter buffer helps to smooth
out the delay variation in the arriving voice packets and
maintain voice quality at the receiving end.
The default values for the jitter buffer for G.711 is 10 min. to
100 max milliseconds.
The default values for the jitter buffer for G.723 is 30 min. to
480 max milliseconds.
The default values for the jitter buffer for G.729 is 10 min. to
480 max milliseconds.
G.711 RTP Packet
Length (ms) Lets you configure the length of the RTP packets for G.711 in
milliseconds. The RTP packet length can be set to 10, 20 or 30
milliseconds. The smaller the packet length, the larger the
bandwidth required.
G.729 RTP Packet
Length (ms) Lets you configure the length of the RTP packets for G.729 in
milliseconds. The RTP packet length can be set to 10, 20 or 30
milliseconds.