User's Manual

Avaya Branch Gateway Manager 10.0 Page 265
15-601011 Issue 29r (Friday, November 02, 2012)B5800 Branch Gateway
Configuration Settings: Extension
· 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.
· Local Hold Music: Default = Off
· 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.
· RE-Invite Supported: Default = Off.
When enabled, Re-Invite can be used during a session to change the characteristics of the session. For example when
the target of an incoming call or a transfer does not support the codec originally negotiated on the trunk. Requires the
ITSP to also support Re-Invite.
· Use Offerer's Preferred Codec: Default = Off.
Normally for SIP calls, the initiator of the calls sends a SIP offer which includes the codecs that they support in order of
preference. The SIP response includes the codec the remote end wants to use for the call. This option can be used to
override that behaviour and use the codec preference offered by the caller. This option is only used when the IP Office
sends INVITES.
· 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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