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VoIP subscriber gateways 27
3.1.2.1.1 ‘Network settings’ submenu. ‘Internet’ service
WAN settings – use this field for WAN interface settings.
– Connection mode – select connection method to WAN from the drop down list (option is available
for configuration only in Internet):
Wired connection – Internet connection is performed only through Ethernet-cable by
using WAN port;
Wireless connection only (3G/4G) – Internet connection is performed via wireless USB
3G/4G modem (via mobile telephone network). To configure modem, you should click link
‘Setup 3G/4G USB modem’;
Switch to reserve channel automatically – Internet connection is performed via key
channel (it is assigned in the main submenu in the ‘Preferred channel’ field) and automatic
transfer will be performed via backup channel in case of vanishing the Internet access via
main channel.
To configure USB-modem, click link ‘Setup 3G/4G USB modem’.
Determination of Internet connection availability is performed by transmitting the ICMP
Echo-Requests via key channel to the service addresses specified in section ‘Check internet
connection availability’. If the response to echo-test is received then decision about Internet
connection availability via main channel is taken otherwise decision about transition to
backup channel is taken. After transition to backup channel, the device continues to poll ping-
servers via the preferred channel and if even one server gets answer the device returns back
to the preferred channel.
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