Billion BiPAC 7404V Series User Manual page 118

VoIP/(802.11g) ADSL2+ (VPN) Firewall Router
4) Dial at Timeout no Prefix
If you only dial 97070 and no more numbers, after the timeout activates, 7070 will be dialed without prefix
to make a regular call via FXO port.
Even though 7070 (only 4 digits) does not match with number of digits 6 defined in the filed, 7070 is still a
valid phone number since it has not exceed 6 digits.
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Chapter 4: Configuration