User`s manual

48
Item Description
Silence Compression:
(VAD)
If this function is enabled, when silence is occurred for a period of
time, no data will be sent across the network during this period in
order to save bandwidth.
(If you use Asterisk, please disable Silence Compression, it
maybe make you call disconnect.)
Voice Codec option:
The Codec is used to compress the voice signal into data
packets. Each Codec has different bandwidth requirement. There
are four kinds of Codec, G.723, G.729AB, G.711_u and G.711_A.
The default value is G.723.
Dial Complete Tone:
When you use the VoIP call, you will heard “DuDu” voice that is
dial complete tone. If you don’t want to heard that tone , you can
disable it.(default is enable).
Dial Termination key:
Setting Termination key to speed up VoIP dial. Select “*” or “#” to
Termination key.
FXS Impedance:
The FXS provides 600/900 OHM impedances for selection.
FXO AC Impedance:
The FXO provides wild and complex ac termination impedances
for selection.
Phone (Line) in/out
volume:
You can adjust the Phone (Line) in/out volume, range from -9db to
9db
(If you adjust too bigger, maybe generation some ECHO or noise)
FXO Tx/Rx Gain:
You can adjust the FXO Tx/Rx Gain , range from -6db to 6db.
(If you adjust too bigger, maybe generation some ECHO or noise)
UK PSTN release tone
detection:
When you use the Gateway to UK, you can Enable this selection
to detection release tone
FXO/FXS Flash detection
and generation duration :
Flash Detection: Let you change flash detection (milliseconds) of
Gateway when phone generate flash to FXS.
Flash Generation: Let you change flash generation time
(milliseconds) for PBX detection.
Ring Frequency:
You can configure how long the Ring Frequency do you want to
use.
DTMF tone power:
Sometimes you input DTMF, but no request. You can adjust this
function, range from -6db to +6db.
FXO Transmit Hybrid:
ECHO cancellation adjust, 3 mode setting to solve ECHO
problem, default is Mode 1. If you have echo problem, try to select