NEC UNIVERGE SL2100, Руководство по программированию

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Program 84 : Hardware Setup for VoIPDB
84-24 : DT800/DT700 Multiline CODEC Basic Information
Setup
Level:
IN
Description
Use Program 84-24 : DT800/DT700 Multiline CODEC Basic Information Setup to set the codec of
each type of DT800/DT700 Multiline Telephone.
Input Data
Type 1 = Type 1
2 = Type 2
3 = Type 3
4 = Type 4
5 = Type 5
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.
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. 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.
When VAD is enabled the CPU will stop
sending silence packets but the IP phone
will continue to transmit silence packets. 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 ~ 4
(1 = 10 ms, 2 = 20 ms,
etc.) Maximum number of G.729 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.
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. 2
SL2100 ISSUE 2.0
2-552 Program 84 : Hardware Setup for VoIPDB
Program
84