Configuration menu: ISDN access
Requirements: Connection to a multipoint interface. This feature has been enabled.
Entry of the external MSNs.
Status inquiry for call forwarding external (CFI)
Here you can set whether or not a query of the current call forwarding external
should be carried out. For public switches that do not support the call forwarding
function via the CF ISDN service, it is recommended to set the inquiry option to
"OFF".
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