Northern UTA220/UTA220k manual Incoming Call Indication INC, Response Messages

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.

UTA220/UTA220k 6-5