Billion BiPAC 7402(G)X(L) Series User Manual page 81

(802.11g) ADSL2+ (VPN) Firewall Router
3G
The router allows you to insert a 3G/HSDPA card to its USB slot, enabling you to use a 3G/HSDPA,
UMTS, EDGE, GPRS, or GSM Internet connection, makes downstream rates of to 14.4 Mbps*.
Profile Port: Select 3G as the profile port.
iBurst: Enable or Disable the router's iBurst functionality.
Usage Allowance: Check to enable usage allowance function.
Click Usage Allowance to continue the detailed configuration.
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Chapter 4: Configuration