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E-13825-A2-GB30-20 November 1996
CCITT V.25bis Dialing Commands
and Responses
Overview E-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Request Commands E-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Request with Number Provided (CRN) E-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Request with Stored Memory Address Provided (CRS) E-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Response E-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Failure Indication (CFI) E-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Delayed Call Indication (DLC) E-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Connecting (CNX) E-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Answer Commands E-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Incoming Call (INC) E-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disregard Incoming Call (DIC) E-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connect Incoming Call (CIC) E-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Program Normal (PRN) E-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Request List of Stored Numbers (RLN) E-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List Stored Number Response (LSN) E-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Command Response E-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valid (VAL) E-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Invalid (INV) E-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview
CCITT
V
.25bis is an international dialing protocol that
permits direct and stored number dialing using DTEs in
either Asynchronous,bisynchronous, or HDLC operating
mode. The 3825Plus
modem supports V
.25bis request and
answer commands that initiate and cancel dialing,
program commands that allow you to create and enter
telephone numbers to memory
, and list commands that
display all telephone numbers stored in directory
locations. As commands are entered from the DTE, the
3825Plus
modem issues a response to the DTE which
indicates if the call failed or connected, or if the command
is valid or invalid.
The following section discusses those V
.25bis
commands supported by the 3825
Plus modem and the
responses to those commands. T
ables E-1 and E-2 in the
Command Response
section list the V
.25bis command and
response and the analogous A
T command.
NOTE
The 3825
Plus
modem must be
configured for V.25bis dialing.
Refer to the &M
n
or &Q
n
commands listed in Chapter 4.
The character format for Asynchronous Dialing mode
is 7 data bits, even parity
, and 1 stop bit.
The character format for bisynchronous Dialing mode
is 7 data bits, odd parity
, and 1 stop bit.
The character format for HDLC Dialing mode can be
8 data bits, no parity, and 1 stop bit; 7 data bits, odd parity,
and 1 stop bit; or 7 data bits, even parity
, and
1 stop bit.
Character format is determined by the DTE. The
modem detects this format when an AT prefix is entered
from the DTE.
E