Paradyne 3800PLUS Call Request Commands, Call Response, Call Request with Number Provided CRN

COMSPHERE 3800Plus Modems

Call Request Commands

Call Request commands are issued from the DTE to the modem and are responsible for initiating any dial calls. Call Request commands include Call Request with Number Provided (CRN) and Call Request with Stored Memory Address Provided (CRS).

Call Request with Number Provided (CRN)

The CRN command dials the telephone number entered from the DTE. CRN is similar to the ATD command.

The CRN command format is:

CRNn

Where: n is the dial string. The following characters are permitted:

T	DTMF Dialing
P	Pulse Dialing
0±9	DTMF Tones or
	Pulse Dialed Digits
* # A B C D	DTMF Tones
R	Reverse Dial
:	Wait for Dial Tone
, or <	User-Defined Pause
&	Flash Hook
= or >	Delimiters

Call Request with Stored Memory Address Provided (CRS)

The CRS command dials the telephone number stored in the request directory location. CRS is similar to the ATDS command.

The CRS command format is:

CRSx

Where: x is directory location 1±10.

The modem responds to the command with either a VAL (valid) or INV (invalid) response followed by a call progress report such as connect (CNX) or failure (CFI).

Call Response

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 one of

ET Engaged tone

NS Number not stored

CB Local DCE busy

RT Timeout 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.

F-2 November 1996 3980-A2-GB30-20