Defines the way the FXS interface will notify its FXO peer upon sip
connect and disconnect events.
The FXS interface can be configured as follows:
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NONE: The FXS will do nothing upon sip connect and disconnect events.
No action will be taken.
-
POLARITY-REVERSAL: For a PSTN IN call, the FXS channel will inverse the
polarity on the line upon reception of a SIP connection event in order
to advertise its fxo peer. FOR PSTN OUT calls the polarity on the line
will also be reversed. For both PSTN IN and PSTN OUT calls, the polarity
on the line will be reversed to its original state once the call is
disconnected. Doing this will let the FXO peer know when the sip side
disconnects the call.
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CURRENT-DISCONNECT: Not supported on this version of the gateway.