PLANET VIP-1680 - Manual (Page 47)

generate flash to FXS.
Flash Generation: Let you change flash generation time (milliseconds) for PBX detection.
Ring Frequency You can configure how long the Ring Frequency do you
want to use.
FXO Battery Reverse
Enable battery reverse to detect polarity from PSTN line.
The PSTN line can send SIP case: Sending the 200 OK
connect signal to caller when detecting polarity reverse
from PSTN Line.
FXO Answer Mode
When user calls the PSTN line which was connected with
the FXO port, there are three answer mode for user to
configure.
4. Ringing Answer Mode (Default Setting): FXO answer
the call once the ring coming from PSTN line.
5. Connecting Answer Mode:
Case A: “Hot Line Number” was NOT assigned in the
FXO port. FXO answer the call once the ring comes
from PSTN line.
Case B: “Hot Line Number” was assigned and the Hot
line number belongs to remote VoIP device.
In this case, FXO port will not answer (off-hook) the
PSTN till the user picks up the call.
(Note: This case can avoid charging for the Local PSTN
call when the remote VoIP device still rings.)
Case C: “Hot Line Number” was setting and the Hot
line number was assigned to another FXS port in
same Gateway. FXO port will not answer (off-hook) till
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