Avaya BCM50 Konfigurationsanleitung PDF herunterladen (Seite 127)

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Chapter 9 Configuring telephony resources 127

Networking Configuration Guide

SIP URI Map

Use the SIP URI Map to configure the sub-domain name associated with each SIP URI (Session

Initiated Protocol Uniform Resource Identifier). These strings must be coordinated with the other

nodes in the network.

Settings

Enable Voice

Activity Detection

<check box> The voice activity detection (silence suppression) identifies

periods of silence in a conversation, and stops sending IP

speech packets during those periods. In a typical telephone

conversation, most of the conversation is half-duplex, meaning

that one person is speaking while the other is listening. For more

information refer to “Silence suppression” on page 529.

If voice activity detection is enabled, no voice packets are sent

from the listener end. This greatly reduces bandwidth

requirements.

G.723.1 and G.729 support silence suppression.

G.711 does not support silence suppression.

Performance note: voice activity detection on all networked

BCMs and IPT systems (VAD setting on IPT systems) must be

consistent to ensure that interacting features such as Transfer

and Conference work correctly.

Default: Disabled

Jitter Buffer Auto

None

Small

Medium

Large

Select the size of jitter buffer you want to allow for your system.

G.729 Payload Size

(ms)

10, 20, 30, 40, 50, 60

Default: 30

Set the desired payload size, per codec, for VoIP calls sent over

SIP trunks.

Note: Payload size can also be set for Nortel IP telephones.

Refer to the Device Configuration Guide (NN40020-300).Refer to

the Telephony Device Installation Guide (NN40020-309).

G.723 Payload Size

(ms)

G.711 Payload Size

(ms)

10, 20, 30, 40, 50, 60

Default: 30

Enable T.38 <check box> Enabled: The system supports T.38 fax over IP.

Disabled: The system does not support T.38 fax over IP

Caution: Operations note: Fax tones that broadcast through a

telephone speaker may disrupt calls at other telephones using

VoIP trunks in the vicinity of the fax machine. Here are some

suggestions to minimize the possibility of your VoIP calls being

dropped because of fax tone interference:

Locate fax machine away from other telephones.

Turn the speaker volume on the fax machine to the lowest level,

or off, if that option is available.

Table 25 SIP Media parameters tab (Sheet 2 of 2)

Field Value Description

1 2 ... 122 123 124 125 126 127 128 129 130 131 132 ... 567 568

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