6.15
SNM15
V.25 bis
Digicom SpA
CFI
CFIXX
CALL FAILURE This is an
indication sent by the DCE in reply
to a CRN, DLN or CRS of the
DTE; it must be accompanied by a
two letter parameter that
determines the cause of it.
In the following is descripted the meaning to be attributed to the
parameters which determine the cause of an indication
CFI
.
CALL STAGE
CB
: This parameters is meant to inform the DTE that the DCE
is not available for the call (it is being tested, is in loop or
it is performing other functions incompatible with the
control of the call).
NS
: The call cannot take place since the number is not present
on the DCE’s memory.
FC
: The call cannot take place since the number is forbidden.
ET
: The call cannot take place since the occupied tone is
detected on line (test for 5 sec.).
MF
: The call cannot take place because the list is completely full.
