0049-2702-XXX Alliance Series Modems – USER MANUAL
08/05/2010
Rev. A
Page 109 of 197
Dialer mode
If you enable the Hayes mode autodialer using the Dialer Mode option, no other
options will be changed. To enable the autodialer this way, select DIALER from SETUP screen
2. Then select HAYES from the DIALER screen.
Command Guidelines
The following guidelines for using Hayes-compatible AT commands also provide a summary of
Hayes mode autodialer operation.
Escape sequence (+ + +)
The escape sequence causes the modem to escape from the data
transfer mode so it can interpret commands. (Alternate characters for the escape sequence can
be assigned via S register S2.)
Attention code AT,
the attention code,
must begin all command lines. There are a few
exceptions – but only a few.
Command sequence
For dialing, a command line begins with
AT
and is followed by a
D
and
the phone number. Other commands should be placed before the dial command – or after the
dial command if it is terminated with a semicolon – for example:
AT M2 V1 D 555-1212; S2=1O
This instructs the ALX to: Keep speaker on (
M2
), send word result codes (
V1
), dial (
D
) 555-
1212, end dial command (
;
), set register 2 to 1 (
S2=1
), and go on-line and wait for carrier (
O
).
Dashes or spaces can be included in the telephone number to make it easier to read:
AT DT 9,(212)555-1234
or
AT DT 9, 212 555 1234
A/ command
Repeats the commands included in the previous command line. Because the
AT
is also repeated, no
AT
is needed to begin this command, nor is a carriage return needed.
A/
is
useful for redialing a telephone number.
Carriage return [CR]
A carriage return (Enter or Return key) is required at the end of the
command line. The modem will not execute a command without it. A carriage return is sent
from the DTE keyboard; a period, which may be entered via the modem’s front panel (PHONE
LCD screen), has the same function.
Dial command modifiers
The dialing modifiers listed in Table 4-2 can be used with the
D
(dial) command to alter dialing operations. An example of a command line using
D
with two
dial modifiers is:
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Страница 189: ...0049 2702 XXX Alliance Series Modems USER MANUAL 08 05 2010 Rev A Page 185 of 197 Figure D 1 Connector pin assignments ...
