NEC UNIVERGE SL2100, Programming Manual

Page: 569 / 678

Program 84 : Hardware Setup for VoIPDB
84-19 : SIP Extension CODEC Information Basic Setup
Level:
IN
Description
Use Program 84-19 : SIP Extension CODEC Information Basic Setup to define the CODEC
information for the SIP extensions.
Input Data
Item
No.
Item Input Data Description Default
01 Number of G.711 Au-
dio Frame 1 = 10 ms
2 = 20 ms
3 = 30 ms
4 = 40 ms Maximum number of G711 Audio Frames.
When the voice is encoded using the PCM
(Pulse Code Modulation) method, a unit is
a frame of 10ms. 2
02 G.711 Silence Detec-
tion (VAD) Mode 0 = Disable
1 = Enable Select whether to compress silence with
G.711. When there is silence, the RTP
packet is not sent. 0
03 G.711 Type 0 = A-law
1 = μ-law Set the type of G.711. 1
04 G.711 Jitter Buffer -
Minimum 0 ~ 300 ms (for VoIPDB
mode)
10 ~ 300 ms* (for Built-In
VoIP mode) Set the minimum value of the G.711 Jitter
Buffer. 20
05 G.711 Jitter Buffer -
Average Set the average value of the G.711 Jitter
Buffer. 40
06 G.711 Jitter Buffer -
Maximum Set the maximum value of the G.711 Jitter
Buffer. 80
07 G.729 Audio Frame 1 ~ 6
(1 = 10 ms, 2 = 20ms,
etc.) Maximum number of G729 Audio Frames.
G.729 assumes the audio signal made by
a specimen by 8 kHz and the frame of 10
ms is assumed to be a unit to 8 kbps by
the encoding compressed method. 2
08 G.729 Silence Com-
pression (VAD) Mode 0 = Disable
1 = Enable Select whether to compress silence with
G.729. When there is silence, the RTP
packet is not sent. 0
09 G.729 Jitter Buffer -
Minimum 0 ~ 300 ms (for VoIPDB
mode)
10 ~ 300 ms* (for Built-In
VoIP mode) 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. 20
10 G.729 Jitter Buffer -
Average Set the average G.729 Jitter Buffer. 40
11 G.729 Jitter Buffer -
Maximum Set the maximum G.729 Jitter Buffer. 80
17 Jitter Buffer Mode 1 = Fixed
3 = Self adjusting Set the mode of the Jitter Buffer.
1 = Size set to the fixed amount for the co-
dec.
3 = The minimum/maximum range for the
codec is used and adjust at any time, re-
gardless of silence. 3
ISSUE 2.0 SL2100
Programming Manual 2-545
Program
84