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ATA Voice Field Reference
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ATA Administration Guide 168
B
Voice tab > Line page >
Network Settings section
NAT Keep Alive
Dest
Destination that should receive NAT keep alive messages.
If the value is $PROXY, the messages are sent to the
current proxy server or outbound proxy server.
The default is $PROXY.
SIP ToS/DiffServ
Value
TOS/DiffServ field value in UDP IP packets carrying a SIP
message.
The default is 0x68.
SIP CoS Value [0-7]
CoS value for SIP messages.
The default is 3.
RTP ToS/DiffServ
Value
ToS/DiffServ field value in UDP IP packets carrying RTP
data.
The default is 0xb8.
RTP CoS Value [0-
7]
CoS value for RTP data.
The default is 6.
Network Jitter
Level
Determines how jitter buffer size is adjusted by the ATA
device. Jitter buffer size is adjusted dynamically. The
minimum jitter buffer size is 30 milliseconds or (10
milliseconds + current RTP frame size), whichever is larger,
for all jitter level settings. However, the starting jitter buffer
size value is larger for higher jitter levels. This setting
controls the rate at which the jitter buffer size is adjusted to
reach the minimum. Select the appropriate setting: low,
medium, high, very high, or extremely high.
The default is high.
Jitter Buffer
Adjustment
Controls how the jitter buffer should be adjusted. Select
the appropriate setting: up and down, up only, down only,
or disable.
The default is up and down.