User`s manual

VoIP/(802.11g) ADSL2+ (VPN) Firewall Router
Chapter 4: Configuration
115
PSTN Dial Plan Examples:
1) Dial with Prefix
If you dial 01223 707070, number 01223707070 will be dialed out via the FXO (PSTN) port to make a
regular phone call.
2) Dial without Prefix
If you dial 9102, the number 102 will only be dialed out via FXO (PSTN) port to make a regular phone call.
Phone Port 1 and 2 will automatically switch to the PSTN line when:
- The Router is Powered Down
- The Internet Service Fails
, i.e., lost of WAN IP Address
- SIP option is disabled.
See VoIP General Setting section.
- Calls match with rule(s) defined in the
PSTN or VoIP Dial Plan.
- SIP service is not accessible:
 User manually disables Registration.
 User inserts a wrong authentication Username or Password.

User dials a wrong SIP number, if the PSTN Auto-Fallback function is
not
enabled. See VoIP General Setting / Advanced for information.
Attention