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54 BCM50 conﬁguration

Enter the information that supports your system.

Ensure that these settings are consistent with the other systems on

your network.

Refer to Table 22 "H.323 Media Parameters ﬁelds" (page 54) and

Table 23 "SIP Media Parameters ﬁelds" (page 55) for a description

of the parameters.

—End—

Table 22

H.323 Media Parameters ﬁelds

Field Value Description

Preferred Codecs

G.711 -uLaw

G.711 -aLaw

G.729

G.723

Add codecs to the Selected list and order them

in the order in which you want the system to

attempt to use them. The system attempts to use

the codecs in top-to-bottom sequence.

Performance note: Codecs on all networked

BCMs must be consistent to ensure the proper

functionality of interacting features such as

Transfer and Conference.

Systems running BCM Release 3.5 or later

allow codec negotiation and renegotiation to

accommodate inconsistencies in codec settings

over VoIP trunks.

Enable Voice

Activity Detection

<check box> Voice Activity Detection (VAD), also known

as 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. If

VAD is enabled, no voice packets are sent from

the listener end. This greatly reduces bandwidth

requirements. G.723.1 and G.729 support VAD.

G.711 does not support VAD.

Performance note: VAD on all networked BCMs

and IPT systems must be consistent to ensure

functionality of features such as Transfer and

Conference. The Payload size on the IPT must

be set to 30ms.

Enterprise: Common

Solution Integration Guide for Multisite Business Communications Manager Systems

NN49000-303 01.01 Standard

Release 4.0, 3.7 29 June 2007

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