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Voice Portal
The above information is provided by AVAYA Inc. as a guideline. See disclaimer on page 1
4
5.1.1 Ensuring best-quality IP Audio
To ensure best audio quality when calling Voice Portal from an IP phone, use the
“display ip-codec-set 1” command and verify that a G711MU codec is shown at
the first position.
Voice Portal supports Voip Audio Formats set to audio/basic(default) or audio/x-
alaw-basic. This selection is defined on the VPMS’s web page under the VoIP
Settings. Make sure the switch is configured to support the codec you select.
If you have selected audio/basic on the VPMS, then the codec set on the switch
should include G711MU. If you have selected audio/x-alaw-basic on the VPMS,
then the codec set on the switch should include G711A.
Note
: When Voice Portal negotiates a codec from the switch at call setup, it
typically will use the first codec on the list (below). A G711MU codec
is typically used in the US and Japan, while a G711A is used in Europe
and other parts of the world.
Figure 1a: Codec Sets
(Continued on next page)
5.1.2 IP-IP Direct
Audio settings
-continued on next page -
Ensuring the best
audio quality.
“disp ip-codec-set 1”
display ip-codec-set 1 Page 1 of 2
IP Codec Set
Codec Set: 1
Audio Silence Frames Packet
Codec Suppression Per Pkt Size (ms)
1: G.711MU n 3 30
2: G.711A n 3 30
3:
4:
5:
6:
7:
Media Encryption: none
Important: This setting should be set to
match the same setting on
the Voice Portal system.
To work properly with Avaya Voice
Portal, the required minimum Packet
Size setting in the IP-Code-Set is 20
ms.