Voice Gateway 4FXS User Manual
- 44 -
Flash: It is polarity reversal and polarity function, they are not opened by
default;
Voice coding: It means voice coding of set port, and supports G711A/U.
G723.1. G729；
Packet Interval: It means the size of voice data package of conversation setting.
The more bigger the value is, the more bigger the voice data package
transmitted at the time of conversation will be, which suggests it makes full
use of the network broadband. Normally, it is applicable to the network with
low broadband. However, the voice delay therefrom is more bigger as well.
Accordingly, set the value small depending on the network rate. The default
value is 1, equal to 15ms;
DTMF Mode: It supports inband, SIPINFO and RFC2833;
DTMF gain: It is defaulted to be -4dB;
In Gain: DSP input gain;
Out Gain: DSP output gain;
Jitter Buffer Level: It is defaulted to be 120 milliseconds.
Explanations:
Fax Settings
Fax ECM: Fax error correction;
Fax modes: It includes three modes of Voice, T38 and bypass (T30);
Max Rate;
High Rate Redundance;
