LevelOne VOI-7100 - Manual (Page 70)

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5.3. SIP-to-PSTN Calling
Applications:
The SIP-to-PSTN calling works when both calling and answering parties are
registered to SIP server with given registered phone numbers. The ADSL can
be as in both Diagrams A and B. Both parties are registered to SIP server
with either fixed real IP or private IP under NAT router.
Configurations:
1. Same as in Example 2.
2.
Select “ON” in the “SIP settings / STUN setting” page, if Outbound Proxy
is NOT available.
3.
Select “ON” for the “Auto Answer” and “PIN Code” in Call settings. Set the
Auto Answer Ring Counter, e.g. 3, and the PIN code, e.g. 1234
4. Upon successful SIP registration, the REG LED indicator will be ON .
Callings:
5. Pick up the phone for VoIP mode, and press 1688# or 1688 to call another
IP Phone with registered SIP phone number 1688.
6. After 3 rings for Auto
Answer, the FXO port will auto answer with a “dodo”
tone (not dial tone). Press 1234# for PIN code and then you will hear a
PSTN dial tone. Note you must add the postfix “#”. PIN Code is used to
prevent from call piracy. Incorrect PIN Code will result in call disconnect.
If PIN code is OFF, the caller may press PSTN number directly.
7. Press 7654321 to call the PSTN party number of 7654321.