PLANET VIP-1680 - Manual (Page 38)

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 H.323 case: Sending the Q.931 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.
1. Ringing Answer Mode (Default Setting): FXO answer the
call once the ring coming from PSTN line.
2. 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 the phone
(connected to the FXS port) was picked up by user.
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