Grandstream Networks, Inc.
GXV300x User Manual
Page 37 of 54
Firmware 1.2.3.7
Updated: 12/2010
AC Termination Imped-
ance
Selects the impedance of the analog line connected to the FXO port on GXV3005
Here is some basic information which may be helpful for initial configuration:
600 Ohm – North America;
270 Ohm + (750 Ohm || 150 nF) -- Most of Europe
220 Ohm + (820 Ohm || 120 nF) – Australia, New Zealand
220 Ohm + (820 Ohm || 115 nF) – Austria, Bulgaria, Germany, Slovakia, South Africa
370 Ohm + (620 Ohm || 310 nF) – UK., India
Silence Timeout
Terminate call after long silence detected. Default is 60 seconds, max 65536.
Caller ID Scheme
The GXV3005 supports 5 different types of schemes:
1. Bellcore (US standard)
2. ETSI_RING
3. ETSI_TAS
4. DTMF
5. NTT (Japanese standard)
Please check with your PSTN service provider (or traditional PBX specs) for which caller
ID scheme it supports.
Call Progress Tones
Using these settings, user can configure tone frequencies according to user preference. By
default, the tones are set to North American frequencies.
Frequencies should be configured with known values to avoid uncomfortable high pitch
sounds. ON is the period of ringing (ON time in ms) while OFF is the period of silence. In
order to set a continuous ring, OFF should be zero. Otherwise it will ring ON ms and a
pause of OFF ms and then repeat the pattern.
“Dial tone”
“Ringback tone”
“Busy”
“Re-order tone”
Please refer the document below to determine your local call progress tones:
http://www.itu.int/ITU-T/inr/forms/files/tones-0203.pdf
Tx to PSTN Audio
Gain(dB)
Allows user to set a value in dB for transmission to PSTN Audio Gain. Default is 1.
Rx to PSTN Audio
Gain(dB)
Allows user to set a value in dB for receive from PSTN Audio Gain. Default is 0.
FXS
S
ETTINGS
The FXS tab would only appear for GXV3006.
T
ABLE
15:
FXS
C
ONFIGURATION
P
AGE
D
EFINITIONS
Onhook Threshold
The amount of time the hookflash is pressed that will cause the device to onhook.
Default is 800ms.
Onhook Voltage
The onhook voltage can be selected according to the line voltage depending on the analog
phone used. The low power/high power will increase/decrease the output current. The de-
fault selection is 48V.
