Paradyne 3821PLUS manual Call Request Commands, Call Response

COMSPHERE 3821Plus Modem

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), 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

A Call Response indicates if the command was

accepted by the modem. Call Response includes Call Failure Indication (CFI) and Call Connecting (CNX).

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.

Delayed Call Indication (DLC)

The DLC response is issued to the DTE if the modem is not currently allowed to call the number. DLC is similar to the AT result code DELAYED.

The DLC response format is:

DLCxx

Where: xx is the delay before the number may be called, in minutes.

F-2 January 1999 3821-A2-GB20-40