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F-13810-A2-GB30-30 September 1998
ITU-T V.25bis Dialing Commands
and Response
Overview F-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Request Commands F-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Request with Number Provided (CRN) F-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Request with Stored Memory Address Provided (CRS) F-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Response F-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Failure Indication (CFI) F-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Connecting (CNX) F-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Call Answer Commands F-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Incoming Call (INC) F-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disregard Incoming Call (DIC) F-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connect Incoming Call (CIC) F-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Program Normal (PRN) F-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Request List of Stored Numbers (RLN) F-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
List Stored Number Response (LSN) F-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Command Response F-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valid (VAL) F-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Invalid (INV) F-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 3800 Series modems support 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
3800 Series modems issue 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 3800 Series modems and the
response to those commands. Tables F-1 and F-2 in the
Command Response section list the V.25bis command and
response and the analogous AT command.
NOTE
The 3800 Series modem must
be configured for V.25bis dialing.
Refer to DTE Dialer Type
configuration option in
Chapter 9, Configure Branch.
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
F