||Gets the modems attention; this prefix must
be included in all commands unless otherwise noted.
||Switches the modem from data to command state,
which usually disconnects modem.; this command
is not proceeded by AT. Most modem have a "guard
time" of 1 second in which no additional
data should be sent to the modem before or after
the escape code is sent, or it will be ignored.
||Instructs the modem to attempt to answer a call.
||Re-executes the last modem executed command;
this is not proceeded by AT.
||Sets the operation standard. B0=CCITT, B1=Bell
||Turns the modem transmit carrier signal on and
off. C0=turn off the modem transmit carrier signal
during normal operation; C1=Turn on modem transmit
carrier signal during normal operation.
||Dials the number, n; T =- Touch-Tone
dialing; P = Pulse dialing; a comma character
will pause 1 second; @ = Wait for 5 seconds of
silence; R = Dial an originate-only modem;
"DS=n" = Dial one of four stored
telephone numbers; : = Return to command mode
after dialing; ! = Go on hook for 1/2 second.
||Turns the command echo feature on/off so that
your commands either are displayed or are not
displayed on the screen. C0=off, C1=on.
||Causes the modem to hang up (place on hook)
or pick up (take poff hook)when in command mode
H0=hang up, H1=pick up.
||Identifies the modem code and the status of
the ROM 0=display 3-digit product ID code (preset
to 248); 1=display checksum; 2=display checksum
and display OK or ERROR.
||Sets the internal speaker volume 0,1=lowest,
||Determines when the speaker is on and off; 0=always
off; 1=on during call and off when receiving data
carrier; 2=always on; 3=off when receiving carrier
and during dialing but not when answering.
||Switches the modem from the command state to
the on-line state; 0=returns the modem to the
on-line state when a connection is still open,
1=returns the modem to the on-line state and initiates
a V.22 bis retrain sequence.
||Displays or suppresses (quiets) result codes
0=displays codes. Default, Q1=suppresses codes
||Read and display registerr
||Set register r to value n. See
S Register Command
||Displays result codes in short form (numbers)
or long form (test); V0=Send numeric responses;
V1=send word responses.
||Result Code & tone detect
||Determines which result codes will be displayed
following modem operations; 0=Basic response set,
blind dialing; X1=Extended response set, blind
dialing; X2=Extended response set, dial tone detection;
X3=Extended response set, blind dialing, and busy
signal detection; X4=Extended response set, dial
tone, and busy signal detection.
||Enables or disables the long-space disconnec.t
||Reset or Restore
||Resets the modem or restores a user profile;
Z=Reset, Z0=restore user profile 0; Z1=restore
user profile 1.
||Controls the Data carrier Detect signal, leaving
the DCD interchange circuit on at all times or
turning it on only when a data carrier is detected;
&C0=force DCD signal active, &C1=DCD signal
indicates true state of remote carrier signal.
||Controls data terminal ready (DTR) transition
0=Ignore DTR signal; 1=Return to command mode
when after losing DTR; 2=Hang up, turn off auto
answer, and return to command mode after losing
DTR; 3=Reset after losing DTR.
||Returns the configuration to the factory settings;
&F=Fetch default configuration 0 ; &F1=Recall
factory default configuration 1 (only works with
||Selects the guard tone (not used on calls within
the U.S.); 0=Disable guard tone; 1=set guard tone
on answering modem to 550 Hz; 2=Set guard tone
to 1800 Hz.
||Sets operation; &M0=Sets asynchronous operation.
&M1, &M2, &M3= sets Synchronous modes.
||Pulse Dial Make/Break
||Selects the ratio of the make/break interval
that the modem uses for pulse dialing; "make"
refers to off-hook, "break" refers to
on-hook; &P0=39/61 for U.S., &P1=33/67
for United kingdom.
||DSR Option Select
||&S0=Force DSR signal active; &S1=DSR
active according to the CCITT specification.
||&T 0=End current test; &T1=Start local
analog loop back test; &T2=Unknown;
&T3=Start local digital loop back test &T4=Grant
remote request for remote digital loop back test;
&T5=Deny remote request for remote digital
loop back test; &T6=Start remote digital loop
back test; &T7=Start remote digital loop back
test with self-test; &T8=Start local analog
loop back test with self-test.
||Displays the user profiles and stored numbers.
|| Stores the current configuration as Profile
0 or 1 0=Profile 0, 1=Profile 1.
||DTE Clock Source
||Selects the synchronous clock source; &X0=Internal
Timing, . &X1=External Timing from local DTE,
&X2=receive timing from remote carrier.
||Active Profile Read
||Selects which user profile will be the default
at power -on and reset; 0=Profile 0, 1=Profile
||Phone number Write
||Stores telephone numbers x in location n (0-3)
x=up to 32 characters. For pulse dialing, 0-9
and dial modifiers for touch dialing, 0-9, dialing
modifiers, A-D, #, and *.