Cisco Cisco IOS Software Release 12.2(11)T
Configuring VoiceXML Voice Store and Forward
Information About VoiceXML Store and Forward
93
Cisco IOS TCL IVR and VoiceXML Application Guide
Note
•
If the codec for an audio recording is not specified in the VoiceXML document, the default codec
used for the recording is G.711 u-law.
used for the recording is G.711 u-law.
•
For recording and playback over an IP call leg, the negotiated codec must match the codec specified
in the VoiceXML document. If the codec specified for the audio file is different than the codec
negotiated for the call, the recording or playback fails and an error is generated.
in the VoiceXML document. If the codec specified for the audio file is different than the codec
negotiated for the call, the recording or playback fails and an error is generated.
•
To determine specific codec support for your platform and Cisco IOS release, use the codec
command in dial-peer configuration mode.
command in dial-peer configuration mode.
Codec Mappings in Audio Recordings
lists the codec number that is mapped to each codec in the audio file header, for .au format and
.wav format files.
Table 8
Codec Numbers Used in Audio File Headers
.AU Files
.WAV Files
Number Codec
Number
Codec
1
PCMULAW
1
MS_PCM
23
32K_ADPCM
2 MS_ADPCM
27
PCMALAW
6 G711_ALAW
39
CISCO_G729
7 G711_MULAW
42
CISCO_G729_b
100 32K_ADPCM
44
CISCO_GSMFR
5339 CISCO_G729
45
CISCO_GSMEFR
5342 CISCO_G729_b
47
CISCO_G723_1r53
5344 CISCO_GSMFR
48
CISCO_G723_1r63
5345 CISCO_GSMEFR
49
CISCO_G723_1ar53
5347 CISCO_G723_1r53
50
CISCO_G723_1ar63
5348 CISCO_G723_1r63
51
CISCO_G726_r16
5349 CISCO_G723_1ar53
52
CISCO_G726_r24
5350 CISCO_G723_1ar63
53
CISCO_G726_r32
5351 CISCO_G726_r16
55
CISCO_G728
5352 CISCO_G726_r24
5353 CISCO_G726_r32
5355
CISCO_G728