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COMSPHERE 3800 Series Modems – Model 3830
D-4 August 1998 3830-A2-GB91-30
Call Failure Indication (CFI)
The CFI response is issued to the DTE if the modem fails a CRN or
CRS command. CFI is similar to the AT result codes BUSY, NO
ANSWER, NO CARRIER, NO DIALTONE, and ERROR.
The CFI response format is:
CFIxx
Where: xx is
ET Engaged tone
NS Number not stored
CB Local DCE busy
RT Time-out on ring tone
AB Abort call on time-out
NT Answer tone not detected
FC Forbidden call
ET is similar to the Call Failure Messages Busy Signal and Trunk Busy
and the result code BUSY.
NS is similar to the Common Operational Message Invalid Number and
the result code ERROR.
CB is similar to the Call Failure Messages Dial Line in Use and No
Dial-Test and the result code ERROR.
RT is similar to the Call Failure Message No Answer Tone and the
result code NO CARRIER.
AB is similar to the Call Failure Messages No Dial Tone and No
Dial-DTR and the result code NO DIALTONE and ERROR.
NT is similar to the Call Failure Message No Quiet Answer and the
result code NO ANSWER.
Call Connecting (CNX)
The CNX response informs the DTE that the modem has connected to
the remote modem. CNX is similar to the AT result code CONNECT.
The CNX response format is CNX.