5.3 How to make a call from FXS to FXO This operation have to define a prefix number for opening FXO port that while user dial
prefix number, the IAD will identify it and open FXO port to route into the PSTN. For
example, after dialing “99” you will hear the second dial tone. Then, you can dial any PSTN
call through the IAD.
Click [VoIP Dialing Plan] for configuration
1. To setup the prefix number and that is the special number can connected to the
PSTN
The default setting is ”99”
2. Or user can establish the number liked by oneself
Click [Apply] button and save your configuration.
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