AudioCodes 405HD, Administrator'S Manual

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Administrator's Manual 5. Configuring VoIP Settings
Version 3.4.3 93 400HD Series IP Phones
5.5.4 Configuring Codecs
Note:
OPUS currently applies to the 405HD, 430HD and 440HD low-end phones, the
450HD high-end phone and the HRS conference device. Support pending on the other
models.
 To define the Codecs:
• Use the table as reference.
Table 5-27: Codec Parameters
Parameter Description
voip/codec/codec_info/%d/enabled Determines the codecs that you want to implement and
their priority. Up to five codecs can be configured, where
the first codec (i.e., voip/codec/0/… ) has the highest
priority. To make a call, at least one codec must be
configured. For best performance it’s recommended to
select as many codecs as possible.
When you start a call to a remote party, your available
codecs are compared with the remote party's to
determine the codec to use. If there is no codec that both
parties have made available, the call attempt fails. Note
that if more than one codec is common to both parties,
you cannot force which of the common codecs are used
by the remote party's client. To force the use of a specific
codec, configure the list with only that specific codec.
The
%d
variable stands for the priority:

0
- Disabled

1 (default) - Enabled
voip/codec/codec_info /%d/name Name of the codec. The variable
%d
depicts the index
number of the codec entry and its priority, where the first
codec (i.e. voip/codec/codec_info/0/name=… ) has the
highest priority. The valid codec parameters are:

G722 G.722 (default)

PCMA G.711 A-Law

PCMU G.711 Mu-Law

G729 G.729

OPUS
For example, voip/codec/codec_info/0/name=G.722
Note :

If OPUS is selected from the list of codecs on a phone
that doesn’t support the OPUS codec, a warning pops
up: 'The hardware doesn't support the OPUS codec'.

To enable OPUS management for enhanced voice
quality, see Section 5.5.5 .
voip/media/opus_payload
Allows the network administrator to configure the OPUS
dynamic payload type. Default: 111.
voip/codec/opus/%d /ptime Packetization time - length of the digital voice segment
that each packet holds. The default is 20 millisecond
packets.