Description:
|
mscVncsVpNewVoiceEncodingChoiceTable OBJECT-TYPE
SYNTAX SEQUENCE OF MscVncsVpNewVoiceEncodingChoiceEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"This attribute specifies preferences regarding the encoding of voice
traffic. During the setup of an audio call, the local and remote ends
negotiate a common encoding to use. The local end's ordered list of
preferred encodings is given by all voiceEncodingChoice elements
that are not set to none. Prior to negotiation, the local end removes
encodings from its list that it cannot use for a particular call. For
example, the card for a particular call may not support certain
encodings. After this local check, the local end sends its voice
encoding preferences to the remote end. The remote end chooses
the most preferred encoding that it can support from the list and this
encoding is the one used during voice traffic. If the remote end
cannot support any encodings on the local end's list, a call does not
proceed and an alarm is issued.
The current encoding and encoding rate are available in Vsr Svs
currentEncoding and Vsr Svs currentRate.
The encoding choice g711Only specifies that pulse code modulation
(PCM) defined by ITU-T G.711 should be performed to encode
voice traffic for calls using this profile. In this case, all voice traffic
is carried uncompressed at 64 kbit/s.
The encoding choice g711G726 specifies that either pulse code
modulation (PCM) defined by ITU-T G.711 or adaptive differential
pulse code modulation (ADPCM) defined by ITU-T G.726 should
be performed to encode voice traffic for calls using this profile. The
actual encoding performed depends on congestion in the network
and the settings of the g711G726 row of the voiceRates attribute.
The encoding choice of g728Only specifies that the Low Delay
Coded Excited Linear Predictive Coder (LD-CELP) algorithm
defined by ITU-T G.728 should be performed to encode voice
traffic for calls using this profile. In this case, all voice traffic is
carried at 16 kbit/s.
The encoding choice of g729Only specifies that the Conjugated
Structure Algebraic Code Excited Linear Predictive Coder
(CS-ACELP) algorithm defined by ITU-T G.729 should be
performed to encode voice traffic for calls using this profile. In this
case, all voice traffic is carried at 8 kbit/s.
The encoding choice of none specifies the end of the encoding
choice list. No other encoding choice can appear after none, and
none cannot appear as the first choice. The only encoding choice
that can appear more than once in voiceEncodingChoice is none.
G.728 and G.729 encoding cannot be performed on a 1pDS1V,
1pE1V or J2MV card.
The negotiated voice encoding is available in Vsr Svs Framer
negotiatedEncoding."
|
|
iso(1)
mscVncsVpNewVoiceEncodingChoiceEntry(1) 
