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4. Once FXO port receives the “SIP 200 OK” signal, FXO port would off-hook to answer the
PSTN call.
Case C: “Hot Line Number” was setting and the Hot line number was assigned to another
FXS port in same Gateway.
1. When the call com from PSTN to FXO, FXO start the Hot line dialing to FXS port.
2. The phone start ring.
3. Once the phone was picked up, FXO port would off-hook to answer the PSTN call.