Biamp A4 - Manual (Page 120)

Audia-Manual-A4
Outbound Proxy Port – This value should be provided by the network administrator (default is
5060). Values in the range of 0 to 65535 are possible. This setting is adjustable per line.
QoS
The items on the QoS tab of the Advanced Settings Dialog are only editable when Audia
Software is not connected to a system.
QoS is Quality of Service. These settings are used to manage network bandwidth. The default
settings are optimized for most VoIP installations; if they need to be modified they should be
specified by the network administrator. The VoIP card differentiates between 3 types of traffic
and there are two layers of QoS settings available for each type:
RTP - This is the peer-to-peer voice traffic.
Call Control - This is the traffic to and from the SIP proxy server.
Other - All other traffic to and from the VoIP card. DHCP, DNS, ICMP, etc.
L2 User Priority - L2 is Layer 2 in the OSI network model (MAC level). This priority setting is
only available on VLAN (802.1Q) tagged packets. This is the 802.1P User Priority (0-7, 7 is the
highest priority). The default setting of 6 matches the IEEE recommendation for delay-sensitive
voice traffic.
L3 Precedence - L3 is Layer 3 in the OSI network model (IP Level). These flags are available on
all traffic and are also known as ToS (0 - 7, a higher number is higher precedence).
L3 Min Delay - The sender requests that data packets be forwarded with minimum delay.
L3 Max Throughput - The sender requests that data packets be forwarded with maximum
throughput.
L3 Max Reliability - The sender requests that data packets be forwarded with maximum
reliability.
L3 Min Cost - The sender requests that data packets be forwarded with minimum monetary
cost. The VoIP card does not support Differentiated Services (DiffServ).
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