260
VoIP Profile Configuration
Step 5
node
(ctx-cs)[switch]#interface
isoip
name
or
node
(ctx-cs)[switch]#interface h323
name
overwrite the settings in the VoIP profile in a
specific CS interface
Step 6
node
(if-
type
)[
if-name
]#dejitter-
mode
mode
Specify the dejitter buffer for a specific H.323 or
ISoIP interface
Step 7
node
(if-
type
)[
if-name
]#dejitter-
max-delay
max-delay
Specify max delay for the dejitter buffer for the
specific H.323 or ISoIP interface
Example: Configure Dejitter Buffer
The following example shows how to define an adaptive dejitter buffer with a maximal delay of 80
ms for the VoIP profile and 40 ms for a specifiy ISoIP interface
SN>
enable
SN#
configure
SN(cfg)#
profile voip ISoIPProfile
SN(pf-voip)[ISoIPPr~]#
dejitter-mode adaptive
SN(pf-voip)[ISoIPPr~]#
dejitter-max-delay 80
SN(pf-voip)[ISoIPPr~]#
exit
SN(cfg)#
context cs
SN(ctx-cs)[switch]#
interface isoip AccessGateway
SN(if-isoip)[AccessG~]#
dejitter-mode adaptive
SN(if-isoip)[AccessG~]#
dejitter-max-delay 40
SN(if-isoip)[AccessG~]#
26.9 Enable/Disable Filters (Advanced)
The voice decoder output is normally filtered using a perceptual post-filter to improve voice quality.
Likewise a high pass filter is normally used to cancel noises at the coder input. When the
communication channels includes several tandems of SmartNodes as illustrated in Figure 26-7,
sequential post filtering or high pass filtering can cause quality degradation. In this case, the user can
choose to disable the post- and the high-pass-filter.
Figure 26-7: Multiple Tandem and sequential Post Filtering
Software Configuration Guide, Revision 1.03
