User`s guide

6-12 Preliminary November 23, 1998 MultiVoice Gateway for the MAX— User’s Guide
Configuring MultiVoice
MultiVoice configuration examples
Configuring the dynamic jitter buffer
To configure the dynamic jitter buffer for a MultiVoice call:
1 Open the Ethernet > Mod Config > VOIP Options menu.
2 Set the Enable Adaptive Jtr Buf parameter by pressing Enter to toggle between Yes and
No, enabling or disabling the dynamic jitter buffer feature. For Example:
Ethernet
Mod Config
Enable Adaptive Jtr Buf=Yes
This parameter defaults to Yes. If this parameter is changed to No, the MultiVoice
Gateway will use the value set for Initial Jtr But Size to create static jitter buffers for calls.
3 Set the Max Jtr Buf Size parameter by pressing Enter to open the edit field, and entering a
value between 1 and 19 (packets). For Example:
Ethernet
Mod Config
Max Jtr Buf Size=19
4 Press Enter to save your change.
This parameter defaults to 19. This parameter is ignored if the Enable Adaptive Jtr Buf
parameter is set to No.
5 Set the Initial Jtr Buf Size parameter by pressing Enter to open the edit field, and entering
a value between 1 and 19 (packets). For Example:
Ethernet
Mod Config
Initial Jtr Buf Size=2
6 Press Enter to save your change.
G.711 1 @ 5ms ea. 52 Bytes 94 Bytes
2 @ 5ms ea. 92 Bytes 134 Bytes
3 @ 5ms ea. 132 Bytes 174 Bytes
4 @ 5ms ea. 172 Bytes 214 Bytes
5 @ 5ms ea. 212 Bytes 254 Bytes
6 @ 5ms ea. 252 Bytes 294 Bytes
7 @ 5ms ea. 292 Bytes 334 Bytes
8 @ 5ms ea. 332 Bytes 374 Bytes
9 @ 5ms ea. 372 Bytes 414 Bytes
10 @ 5ms ea. 412 Bytes 454 Bytes
Table 6-1. Impact of configurable voice frames on IP packet size
Audio
codec
Number of
voice frames
RTP packet
size
Ethernet
frame size