Page 382 of 910 Configuration of IP Telephony nodes using Element Manager
553-3001-365 Standard 4.00 August 2005
Figure 89
Codec list
Note: The codec list contains four codec settings for G.711, G.729A,
C.723.1, and T.38 FAX for the Voice Gateway Media Card.
3The G.711, G711 Clear Channel, and T.38 FAX codecs are selected by
default, and these selections cannot be cleared. However, the following
changes can be made:
• The payload size, jitter buffer setting, and companding law for the
G.711 codec can be changed. The default is G.711 mu-law.
• Only the jitter buffer can be changed for the G.711 Clear Channel
codec.
Up to three additional codecs can be optionally selected: G.729A,
G.729AB, and/or G.723.1 codecs.
• If the G.729A or G.729AB codec are selected, the payload and jitter
buffer can be changed. The payload defaults are the maximum
supported payload.
• If the G.723.1 codec is selected, only the jitter buffer can be changed.
The payload size of 30 msec is the only supported payload.
Note: The supported G.723.1 codec has bit rates of 5.3 Kbps and
6.3 Kbps.