Overview - Paradyne COMSPHERE 3821Plus User Manual

ITU-T V.25bis Dialing Commands

Overview

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Call Request Commands
Call Request with Number Provided (CRN)
Call Request with Stored Memory Address Provided (CRS)
Call Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Failure Indication (CFI)
Delayed Call Indication (DLC)
Call Connecting (CNX)
Call Answer Commands
Incoming Call (INC)
Disregard Incoming Call (DIC)
Connect Incoming Call (CIC)
Program Normal (PRN)
Request List of Stored Numbers (RLN)
List Stored Number Response (LSN)
Command Response
Valid (VAL)
Invalid (INV)
Overview
ITU-T 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 3821Plus 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
3821Plus 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 sections discuss those V.25bis
commands supported by the 3821Plus modem, and the
responses to those commands.
Command Response list the V.25bis command and
response and the analogous AT command.
3821-A2-GB20-30
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Tables F-1 and F-2 in
and Responses
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The 3821 Plus modem must be
configured for V.25bis dialing.
Refer to the &M n or &Q n
commands in
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.
February 1998
F
F-1
F-2
F-2
F-2
F-2
F-2
F-2
F-3
F-3
F-3
F-3
F-3
F-3
F-3
F-3
F-4
F-4
F-4
NOTE
Chapter 4.
F-1