Configuring the fxo channels – Grandstream GXW410x User Manual User Manual
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Grandstream Networks, Inc.
GXW410x User Manual
Page 21 of 32
Firmware Version 1.4.1.5 Last Updated: 5/2014
CONFIGURING THE FXO CHANNELS
Configuring the FXO channels on the GXW
– 410x is an easy process. Follow the GUI interfaces. The
Device Status page terms are defined in Table 8: FXO Lines Configuration Definitions. An example of
the Channel Dialing Configuration is shown in Figure 6. Please note the default is always configured.
The user has the option to change the default settings as described in the Table 8.
TABLE 10: FXO LINES (SETTINGS / DIALING)
FXO LINES
Settings
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”
“Confirmation tone”
Please refer the document below to determine your local call progress tones
or run the FXO Line Test
(Table 9).
Tx to PSTN Audio Gain
(dB)
Allows user to set a value in dB for transmission to PSTN Audio Gain. Default is 1.
Range is from -12 to 12dB.
Rx from PSTN Audio Gain
(dB)
Allows user to set a value in dB for receive from PSTN Audio Gain. Default is 0.
Range is from -12 to 12dB.
Silence Suppression
This controls the silence suppression/VAD feature of G723 and G729. If set to “Yes”,
when a silence is detected, small quantity of VAD packets (instead of audio packets)
will be sent during the period of no
talking. If set to “No”, this feature is disabled.
Echo Cancellation
When set to Y, Echo cancellation is enabled.
Enable Current Disconnect
When set to Y, Current Disconnect is enabled. Certain PSTN COs require this to be
enabled, in order to realize disconnect signal from PSTN side. Default is Y.
If enabled use threshold: Default is 100ms. Range is 40ms to 800ms.
Certain PSTN service providers have a threshold time within which the line stabilizes
after off-hook. It is entirely dependent on provider, however if you experience PSTN
line detection issues, please modify this setting appropriately in 100ms increments.
If you are not sure if this option should be enabled please refer to Table 9 (FXO Lines
Test Tab Definition). This tool will run an automated test to determine the proper
PSTN configuration that the gateway should have to work with your Service Provider
or analog PBX.
Enable Tone Disconnect
Default is No. If PSTN provider uses call progress tones then it should be set to Yes
in order to realize disconnect tone. Please configure accurate Call Progress Tones on
Channels webpage based on PSTN provider (or traditional PBX) settings.
If you are not sure if this option should be enabled or what Call Progress Tones are
required please refer to Table 9 (FXO Lines Test Tab Definition). This tool will run an
automated test to determine the proper PSTN configuration that the gateway should
have to work with your Service Provider or analog PBX.
Enable Polarity Reversal
Default is No. This should be set to Yes only if the FXO lines are subscribed to PR
service from PSTN Service provider. It is merely a PR detect feature.
***Note: If there is no PR service from provider on the FXO line, and this setting is
configured to Yes, calls will not be successful.
Enable
Call
Answer
Supervision
Default is No. If PSTN providers use the CAS then this option should be enabled.
The Call Answer Supervision (CAS) is for billing
—the telephone exchange and the