Avaya Nortel Communication Server 1000 Manual page 287

3
4
Copyright © 2003–2008, Nortel Networks
.
Configure IP Line data using Element Manager 287
j. FAX packet size: Select the desired FAX packet size. The
default value is 30 bytes. The range is 20 to 48 bytes.
To select a codec, scroll through the list, and click the corresponding
Select check box. A maximum of four codecs can be selected.
Nortel recommends that the system be configured with both G.711 and
G.729A if there is a possibility that an IP Softphone 2050 could be
configured with the "I use a modem to connect to the network" check box
checked. If the node does not have G.729A and/or G.723 configured, IP
Softphone 2050 users with that checkbox selected will have calls blocked.
This does not apply to the MVC 2050 as it only supports G.711 capability;
there is no dial-up capability.
For more information, see IP Phones Fundamentals (NN43001-368).
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.
The 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.
The supported G.723.1 codec has bit rates of 5.3 kb/s and 6.3 kb/s.
Expand the selected Codec. See
288).
Nortel Communication Server 1000
IP Line Fundamentals
NN43100-500 02.02 Standard
Release 5.5 4 February 2008
Recommendation
Figure 65 "Selected Codec" (page