Northern UTA220/UTA220k - Manual (Page 59)

UTA220/UTA220k
6-5
V.25 bis Dialer Operation
Incoming Call Indication: INC
Upon receiving an incoming call, the UTA220 sends the DTE
an Incoming Call Indication (INC). Only one indication is
given per call. If the auto-answer option is on, the UTA220
will answer the call after the number of rings designated by the
S0 command.
Response Messages
A response message is sent by the UTA220 immediately after
it receives a V.25 bis command message. Response messages
are shown in Table 6-2.
Table 6-2: Response Messages
Character Function
VAL Valid Command.
INV Invalid Command. Command is invalid or inappropriate.
INVCU Command Unknown. Transmission error (parity, framing)
occurred.
INVMS Invalid Message Syntax. Command is too long; command contains
invalid characters.
INVPS Invalid Parameter Syntax. Wrong number of parameters;
parameter contains invalid character or too many characters.
INVPV Invalid Parameter Value. Parameter is out of range or is null.
CFIAB Call Failure, Call Aborted.
CFICB Call Failure, Local DCE busy.
CFIDT Call Failure, No Dial Tone.
CFIET Call Failure, Busy.
CFINT Call Failure, No Answer Tone.
CFIRT Call Failure, Connect Time-out.
CFI Call Failure, Reason Unknown.