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5.6. Direct IP to Direct IP Calling
Applications:
The applications are for ADSL connection without NAT router
as in Diagram A. Both parties are with fixed real IP. The
Direct IP calling works when both calling and answering parties
are with known fixed IP. SIP server registrations are not
required in this application.
Configurations:
1. Select ¡Fixed IP¡ in the ¡Network / WAN settings¡ page,
2. Enter the items of IP, Subnet Mask, Gateway IP,
3. Click the ¡Submit¡ button.
Callings:
4. Pick up the phone, and you should hear a dial tone.
5. Press 211*21*191*4# or 211*21*191*4 to call the party
with the real IP address of 211.21.191.4. Note that # key
will dial out the number immediately. Dialling without # will
not dial out until the auto dial timer (default=5 seconds)
elapsed. In a moment, you should hear a ring back tone,
and wait for the VoIP called party to answer.