Patton electronic SmartNode 4110 Series ユーザーズマニュアル

VoIP profile configuration task list

583

SmartWare Software Configuration Guide

47 • VoIP profile configuration

Mode: Profile VoIP

Enabling/disabling filters (advanced)

The voice decoder output is normally filtered through a perceptual post-filter to improve voice quality. Like-
wise a high pass filter is normally used to cancel noises at the coder input. When the communication channels
include several SmartNodes in tandem as shown in

figure 5

, sequential post filtering or high pass filtering can

cause degrade signal quality. In this case, the user can choose to disable the post-filter and the high-pass-filter.

Note

Filtering only occurs with G.723 and G.729 codecs.

Figure 5. Multiple tandem and sequential post filtering

This procedure describes how to disable post-filtering and high-pass-filtering.

Mode: Profile VoIP

Example: Disable filters

The following example shows how to disable the decoder output post-filter and the input high-pass filter.

node>enable
node#configure
node(cfg)#profile voip myProfile
node(pf-voip)[myProfi~]#no post-filter
node(pf-voip)[myProfi~]#no high-pass-filter

Step

Command

Purpose

node(pf-voip)[name]#dejitter-mode mode Specify the dejitter buffer as adaptive, static or

static-data.

node(pf-voip)[name]#dejitter-max-delay
max-delay

Specify the maximum delay in milliseconds that the
dejitter buffer is allowed to introduce. This setting
is valid for all modes.

Step

Command

Purpose

node(pf-voip)[name]#no post-filter

Disable decoder output filter

node(pf-voip)[name]#no high-pass-filter

Disable decoder input high pass filter

VoIP

ISDN

Sequential post filtering

Node

PSTN

Node