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4 AT Commands, S-Registers, and Result Codes
24
MultiModemZPX User Guide
@ Wait for quiet answer. Causes modem to wait for a ring
back, then 5 seconds of silence, before processing next part
of command. If silence is not detected, the modem returns a
NO ANSWER code.
^ Disable data calling tone transmission.
$ Detect AT&T call card “bong” tone. The character should
follow the phone number and precede the user’s call card
number: ATDT1028806127853500
$123456789.
Command: DS=
n
Dial Stored Telephone Number
Values: n = 0, 1
Default: none
Description: Dials a number previously stored in directory number y by the
&Zn=x command. Example: ATDS=1.
Command: E
n
Echo Command Mode Characters
Values: n = 0 or 1
Default: 1
Description: E0 Does not echo keyboard input to the terminal.
E1 Does echo keyboard input to the terminal.
Command: F
n
Echo Online Data Characters
Values: n = 1
Default: 1
Description: F0 Enables online data character echo. (Not supported.)
F1 Disables online data character echo (included for backward
compatibility with some software).
Command: H
n
Hook Control
Values: n = 0 or 1
Default: 0
Description: H0 Goes on-hook (hangs up).
H1 Goes off-hook (makes the phone line busy).
Command: I
n
Information Request
Values: n = 0–5, 9, 11
Default: None
Description: I0 Displays default speed and controller firmware version.
I1 Calculates and displays ROM checksum (e.g., B399).
I2 Checks ROM and verifies the checksum, displaying OK or ERROR.
I3 Displays default speed and controller firmware version.
I4 Displays firmware version for data pump (e.g., 17).
I5 Displays the board ID: software version, hardware version, and
the country ID in hexadecimal format (e.g., s0503a01V, 0, 34).
I9 Displays the country code in decimal format (e.g., 52).
I11 Displays diagnostic information for the last modem
connection, such as DSP and firmware version, link type, line
speed, serial speed, type of error correction/data compression,
number of past retrains, etc.