User's Manual

Avaya Branch Gateway Manager 10.0 Page 263
15-601011 Issue 29r (Friday, November 02, 2012)B5800 Branch Gateway
Configuration Settings: Extension
· Prefer – Media security is preferred. Attempt to use secure media first, and if unsuccessful fall back to
non-secure media. This option is not available for H.323 extensions.
· System Default – Use the system-wide default setting specified in the system Media Security (SIP) field (
System | Telephony | Telephony ).
· Advanced
You are able to select this button when the Media Security field is set to Enforce or Prefer. When selected, the
Advanced Media Security Options are displayed.
· Encryptions: Default = RTP
This setting allows selection of which parts of a media session should be protected using encryption. The
default is to encrypt just the RTP stream (the speech).
· Authentication: Default = RTCP
This setting allows selection of which parts of the media session should be protected using authentication. The
default is authenticate just the RTCP stream (call control signals).
· Replay Protection:
Displays the options for the SRTP window size. Currently not adjustable.
· SRTP Window Size: Default = 64.
· Crypto Suites: Default = SRTP_AES_CM_128_SHA1_80 and SRTP_AES_CM_128_SHA1_32.
· 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.
· Enable FastStart for non-Avaya IP Phones: Default = Off
A fast connection procedure. Reduces the number of messages that need to be exchanged before an audio channel is
created.
· Out of Band DTMF: Default = On
When on, DTMF is sent as a separate signal ("Out of Band") rather than as part of the encoded voice stream ("In
Band"). The "Out of Band" signaling is inserted back into the audio by the remote end. This is recommended for low
bit-rate compression modes such as G.729 and G.723 where DTMF in the voice stream can become distorted.
· For Avaya 1600, 4600, 5600 and 9600 Series phones, the system will enforce the appropriate setting for the
phone type.
· Local Tones: Default = Off
When selected, the H.323 phones generate their own tones. This option is not supported by Avaya IP phones
softphone application.
· 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.
· Reserve Avaya IP Endpoint License:
Not used for Avaya Branch Gateway.
· Reserve 3rd Party IP Endpoint License:
Not used for Avaya Branch Gateway.
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