User's Manual
Avaya Branch Gateway Manager 10.0 Page 235
15-601011 Issue 29r (Friday, November 02, 2012)B5800 Branch Gateway
Configuration Settings: Line
5.4.10.3 VoIP
This form is used to configure the VoIP setting applied to calls on the IP DECT line.
Usability
· Mergeable: These settings are not mergeable. Changes to these settings will require a reboot of the system.
· Gateway IP Address: Default = Blank
Enter the IP address of the gateway device at the remote end. This address must not be shared by any other IP line
(H.323, SIP, SES or IP DECT).
· Codec Selection: Default = System Default
This field defines the codec or codecs offered during call setup.
· The available codecs in default preference order are: G.711 A-Law, G.711 U-Law, G.729 and G.723.1.
Note that the default order for G.711 codecs will vary to match the system's default companding setting.
G.723.1 is not supported on Linux based systems. The G.722 64K codec is also supported on systems with
IP500 VCM, IP500 VCM V2 or IP500 Combo cards but it not used by default.
The codecs available to be used are set through the System Codec list (System | System Codec ). The
drop-down selector options are:
· System Default
This is the default setting. When selected, the codec list below show matches the codecs set in the system
wide Default Selection list (System | Codecs ).
· Custom
This option allows specific configuration of the codec preferences to be different from the system Default
Selection list. When Custom is selected, the list can be used to select which codecs are in the Unused list
and in the Selected list and to change the order of the selected codecs.
· TDM | IP Gain: Default = Default (0dB). Range = -31dB to +31dB.
Allows adjustment of the gain on audio from the system TDM interface to the IP connection.
· IP | TDM Gain: Default = Default (0dB). Range = -31dB to +31dB.
Allows adjustment of the gain on audio from the IP connection to the system TDM interface.
· Media Security: This field is disabled for IP DECT lines.
· Advanced: This button is disabled for IP DECT lines.
· VoIP Silence Suppression: Default = Off
When selected, this option will detect periods of silence on any call over the line and will not send any data during
those silent periods. This feature is not used on IP lines using G.711 between systems. On trunk's between networked
systems, the same setting should be set at both ends.
· Allow Direct Media Path: Default = On
This settings controls whether IP calls must be routed via the system or can be routed alternately if possible within the
network structure.
· If enabled, IP calls can take routes other than through the system. This removes the need for a voice compression
channel. Both ends of the calls must support Direct Media and be using the same protocol (H.323 or SIP). Enabling
this option may cause some vendors problems with changing the media path mid call.
· If disabled or not supported at on one end of the call, the call is routed via the system. RTP relay support allows
calls between devices using the same audio codec to not require a voice compression channel.
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