NEC SL1100 Programming Manual page 536

SL1100
Item
No.
08 G.729 Silence Com-
pression (VAD) Mode
09 G.729 Jitter Buffer -
Minimum
10 G.729 Jitter Buffer -
Standard
Program
11 G.729 Jitter Buffer -
Maximum
84
17 Jitter Buffer Mode Set
the mode of the Jitter
Buffer.
18 Silence Compression
(VAD) Threshold
28 Priority Codec Setting 0 = G711 PT
30 EchoAuto Gain Con-
trol
31 DTMF Payload Num-
ber
32 G.722 Audio Frame
34 G.722 Jitter Buffer -
Minimum
35 G.722 Jitter Buffer -
Standard
36 G.722 Jitter Buffer -
Maximum
37 RTP Filter
2-516
Item Input Data
0 = Disable
1 = Enable
0 ~ 300 ms
0 ~ 300 ms
0 ~ 300 ms
1 = static
3 = adaptive immediately
1 ~ 30
(self-adjustment and - 19
dB ~ + 10dB)
1 = - 19 dB (- 49 dBm)
:
20 = 0 dB (- 30 dBm)
:
29 = 9 dBm (- 21 dBm)
30 = 10dBm (- 20dBm)
2 = G729 PT
3 = G.722 PT
0 ~ 5
96 ~ 127
1 = 10 ms
2 = 20 ms
3 = 30 ms
4 = 40 ms
0 ~ 255 ms
0 ~ 255 ms
0 ~ 255 ms
0 = Disable
1 = Enable
Description
Select whether to compress silence with
G.729. When there is silence, the RTP
packet is not sent.
When VAD is enabled the CPU will stop
sending silence packets but the IP phone
will continue to transmit silence packets.
Set the minimum value of the Jitter Buffer
of G.729 is set. Jitter is the variation in the
time between packets arriving and the buf-
fer allows this variation to be absorbed.
Set the average G.729 Jitter Buffer.
Set the maximum G.729 Jitter Buffer.
1 = Size set to the fixed amount for the co-
dec.
2 = The minimum/maximum range for the
codec is used.
3 = The minimum/maximum range for the
codec is used and adjust at any time, re-
gardless of silence.
Set the voice level judged to be silence.
Change value based .30
This entry is ignored if silence compres-
sion is disabled in 84-01-03 with G.711, or
84-01-06 with G.729.
The option selected here determines what
other codec options are applied by priority.
Define the Auto Gain Control.
Maximum number of G.722 Audio Frames.
G.722 assumes the audio signal made by
a specimen by 16kHz and the frame of
10ms is assumed to be a unit to 64kbps by
the encoding compressed method.
The Audio frame size setting is only from
IP phone to IP phone. When the IP phone
communicates to a TDM device it will al-
ways use a 20 ms frame size.
Softphone (SP310) only supports 20 ms.
Set the minimum value of the Jitter Buffer
of G.722 is set. Jitter is the variation in the
time between packets arriving and the buf-
fer allows this variation to be absorbed.
Set the average G.722 Jitter Buffer.
Set the maximum G.722 Jitter Buffer.
Program 84 : Hardware Setup for VoIPDB
ISSUE 4.0
Default
0
20
40
80
3
20
0
0
96
3
30
60
120
1