AT&T DataPort PCX Modem User Manual page 42

AT Commands and S-Registers
Table B-1. AT Command and S-Register List (3 of 21)
AT Command/
S-Register
DL
Description
(DIAL COMMAND MODIFIERS, continued)
; Return to Command mode. Allows
AT command strings that exceed the length
limit to be linked together. This is useful
when using a calling card number or an
international telephone number. The
modem remains in Command mode until a
dial string ends without a semicolon.
@ Quiet answer. The modem waits for
5 seconds of silence before continuing with
the next part of the dial string. If silence is
not detected in the amount of time specified
by S-register S7, the modem terminates the
call and sends NO ANSWER or BUSY to
the computer.
& Wait for credit card dialing tone. If the tone
is not detected in the time specified by S7,
the modem aborts the dialing sequence.
returns on-hook, and generates an error
message.
Spaces, hyphens, and parentheses
These may be included for readability, but
do not affect dialing.
No characters
If a Dial command is entered with no
numbers or modifiers, the modem goes
online and proceeds with handshaking in
Originate mode. It identifies itself as a fax
modem or a data modem according to the
setting of +FCLASS.
NOTE: Before the modem goes online, any character
from the DTE aborts the dial sequence.
DIAL LAST NUMBER
Redials the last number dialed. Only the last part of
dial strings separated by the Return to Command dial
modifier (:) is redialed.
Issue 2 July 1995
B-3