English
Chapter 3 - Configuration
Packetization period
Select the packetization period to be used for each selected CODEC. Each codec has a different basic packetize period (usually it’s 30ms for G.723, 10ms for G.729). You can select longer time period to increase the transmission efficiency. But, longer packetization time will cause longer delay time.
3.4.2 DTMF & Gain & Dialling
DTMF
This field allows configuration of the DTMF signaling options for SIP. Select whether the OOB
Jitter buffer
The Jitter Buffer settings apply to all active CODEC decoders. You may choose an adaptive jitter buffer or a fixed length jitter buffer. For an adaptive jitter buffer, choose the maximum allowable play out delay (in milliseconds). For a fixed jitter buffer, choose the fixed play out delay (in milliseconds). Finally, select whether or not a decoder should automatically switch from an adaptive jitter buffer to a fixed jitter buffer upon fax/modem tone detection. Adaptive jitter buffers are sometimes detrimental to fax transmission over G711 CODECs if they have to adapt too rapidly or too extensively due to inconsistent and widespread packet delays. In these adverse network conditions, a fixed jitter buffer provides superior performance when handling incoming fax transmissions over G711 CODECs.
Tx/Rx Gain
You can adjust the VoIP voice transmission and receive volume by adding or decreasing the db value. The adjustable range is from
Actually , this is a very wide range for gain adjustment; the default value is 0 db for both direction. To set the gain too high may cause echo, voice distortion or DTMF tone will not be able to send the correct errors. Normally, it is reasonable to make the adjustment between
16 |