CONFIGURING THE FXO CHANNELS
Configuring the FXO channels on the GXW410x gateway is an easy process. Follow the GUI interfaces.
The Device Status page terms are defined in Table 9: 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 9.
TABLE 9: FXO LINES CONFIGURATION DEFINITIONS
Syntax for Channel Specific Settings:
Default: ch1-8:X; {all channels 1 to 8 are set to use value X}
Additional Examples:
ch1,3-6:10;ch2,7-8:12 {channels 1,3,4,5 and 6 are set to use value 10 while channels 2,7 and 8
are set to use value 12.
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 10 (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 web page
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 10 (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.
Silence Timeout
Terminate call after long silence detected. Default is 60 seconds, max 65536.
AC Termination
Impedance
Selects the impedance of the analog line connected to the FXO port on the GXW410x. 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
If this parameter is not configured properly you may experience echo or noise in the line. Please
refer to Table 10 (FXO Lines Test Tab Definition). This tool will run an automated test to
determine the correct impedance value to match your lines.
(38 pages)
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