US Robotics 005687-03 - User manual

TECHNICAL QUICK REFERENCE
1
This section includes information about:
• Lights (external modems only)................................................................2
• Typing Commands.................................................................................4
• Basic Data Commands..........................................................................5
• Extended Data Commands...................................................................13
• DIP Switches......................................................................................20
• S-Registers.........................................................................................22
• Fax Commands...................................................................................33
• The Serial Interface (cable information)................................................37

TECHNICALQUICKREFERENCE
2
Lights(ExternalModemsOnly)
Front-of-the-Case Lights (on All Non-Voice Externals and Some Voice Externals)
Symbol Meaning Status
AA............Auto Answer Answer mode: ON when register S0 is set to 1 or higher (Auto Answer),
and when answering a call; OFF when modem originates a call. Light
flashes when there is an incoming call.
CD.............Carrier Detect ON if modem receives a valid data signal (carrier) from a remote modem,
indicating that data transmission is possible. Always ON if CD override is
ON (&C0).
RD.............Received Data Flashes when modem sends result codes or passes received data bits from
remote.
SD..............Send Data Flashes when computer sends a data bit to modem.
TR..............Data Terminal Ready ON if modem receives a DTR signal from computer. Always ON (modem
ignores DTR) if the DTR override is ON (&D0).
CS..............Clear to Send ON until modem lowers CTS when Transmit Data hardware flow control is
enabled (&H1, &H3).
ARQ/ Error Control/
FAX..........Fax Operations Data Mode: Automatic Repeat Request. ON if modem is set to &M4 or &M5
and successfully establishes an error control connection. Flashes when
modem retransmits data to remote modem. Fax Mode: Flashes to indicate fax
mode.

TECHNICALQUICKREFERENCE
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Top-of-the-Case Lights (on Some Voice Externals)
Light What It Means When Lit
POWER................The modem is turned on.
SEND...................The computer is sending a data bit to the modem.
RECEIVE .............The modem is sending result codes or passing received data bits from the remote.
ONLINE...............The modem is online. (NOTE: This light blinks when the mute feature is being
used.)

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TypingCommands
• Type commands in either upper or lower case, not a combination. Use the
Backspace key to delete errors. (You cannot delete the original AT command since
it is stored in the modem buffer.)
• If a command has numeric options and you don’t include a number, zero is
assumed. For example, if you type ATB, the command ATB0 is assumed.
• Every command except A/, +++, and A> must begin with the AT prefix and be entered
by pressing ENTER.
• The maximum command length is 58 characters. The modem doesn’t count the AT prefix,
carriage returns, or spaces.
NOTE: All defaults are based on the &F1Hardware Flow Control template
loaded in NVRAM when the modem is shipped. Defaults are listed in italics.

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BasicDataCommands
<control key>S
Stop or restart help screens.
<control key>C
or
<control key>K
Stop help screens.
$Use in conjunction with D, S,
or &commands (or just AT)
to display a basic command
list; online help.
AManual Answer: goes off hook
in answer mode. Pressing any
key aborts the operations.
A/ Re-executes the last issued
command. Used mainly to
redial. Does not require the
AT prefix or a Carriage
Return.
A> Re-executes the last issued
command continuously, until
the user intervenes or the
command is executed. forever.
Does not require the
AT prefix or a Carriage
Return.
Any key Aborts off-hook dial/answer
operation and hangs up.
AT Required command prefix, except
with A/, +++, and A>. Use alone to
test for OK result code.

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BnU.S./ITU-T answer
sequence.
B0 ITU-T answer
sequence
B1 U.S. answer tone
DnDials the specified phone
number. Includes the
following:
0-9 Numeric digits
#, * Extended touch-tone
pad tones
LDials the last dialed number.
PPulse (rotary) dial
ROriginates call using answer
(reverse) frequencies.
Sn Dials the phone number string
stored in NVRAM at position
n (n = 0−3). Phone numbers
are stored with the &Zn=s
command.
TTone dial
,(Comma) Pause, See S8
definition; which it’s
linked to.
;(Semicolon) Return to
Command mode after dialing.
“Dials the letters that follow (in
an alphabetical phone
number).
!(Exclamation point) Flashes
the switch hook.
/Delays for 125 ms. before
proceeding with dial string.
WWait for second dial tone (X2
or X4); linked to S6 register.

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Dn (cont.)
@Dials, waits for quiet answer,
and continues (X3 or higher).
$Displays a list of Dial
commands.
EnSets local echo.
E0 Echo OFF
E1 Modem displays
keyboard commands
FnSets online local echo of
transmitted data ON/OFF.
F0 Local echo ON.
Modem sends a copy
of data it sends to the
remote system to your
screen.
F1 Local echo OFF. Receiving
system may send a remote
echo of data it receives.
HnControls ON/OFF hook.
H0 Hangs up (goes on hook).
H1 Goes off hook.
InDisplays the following information.
I0 Four-digit product code
I1 Results of ROM checksum
I2 Results of RAM checksum
I3 Product type
I4 Current modem settings
I5 Nonvolatile memory
(NVRAM) settings
I6 Link diagnostics
I7 Product configuration
I9 Plug and Play information
I11 Extended link diagnostics

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LnControls speaker volume
(internals only).
L0 Low volume
L1 Low volume
L2 Medium volume
L3 High volume
MnOperates speaker.
M0 Speaker always OFF.
M1 Speaker ON until
CONNECT.
M2 Speaker always ON.
M3 Speaker ON after dial,
until CONNECT.
OnReturns online.
O0 Returns online.
O1 Returns online and
retrains.
PSets pulse dial (for phone
lines that don’t support
touch-tone dialing).
QnDisplays/suppresses result
codes.
Q0 Displays result codes.
Q1 Quiet mode; no result
codes.
Q2 Displays result codes
only in Originate
mode.

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Sr.b=nSets bit .b of register r to n
(0/OFF or 1/ON).
Sr=nSets register r to n.
Sr?Displays contents of
S-Register r.
S$ Displays a list of the S-
Registers.
TSets tone dial.
VnDisplays verbal/numeric
result codes.
V0 Numeric codes
V1 Verbal codes

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XnSets result code displayed. Default is X4.
Result Codes X0 X1 X2 X3 X4
0/OK •••••
1/CONNECT •••••
2/RING •••••
3/NO CARRIER •••••
4/ERROR •••••
5/CONNECT 1200 ••••
6/NO DIAL TONE • •
7/BUSY • •
8/NO ANSWER* • •
9/Reserved
10/CONNECT 2400 ••••
11/RINGING •
13/CONNECT 9600 ••••
18/CONNECT 4800 ••••
20/CONNECT 7200 ••••
21/CONNECT 12000 ••••
25/CONNECT 14400 ••••
43/CONNECT 16800 ••••
85/CONNECT 19200 ••••
91/CONNECT 21600 ••••
99/CONNECT 24000 ••••
103/CONNECT 26400 ••••
107/CONNECT 28800 ••••
151/CONNECT 31200 ••••
155/CONNECT 33600 ••••

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XnResult Codes (cont.) X0 X1 X2 X3 X4
256/CONNECT 28000 ••••
260/CONNECT 29333 ••••
264/CONNECT 30666 ••••
268/CONNECT 32000 ••••
180/CONNECT 33333 ••••
272/CONNECT 34666 ••••
276/CONNECT 36000 ••••
184/CONNECT 37333 ••••
280/CONNECT 38666 ••••
284/CONNECT 40000 ••••
188/CONNECT 41333 ••••
192/CONNECT 42666 ••••
196/CONNECT 44000 ••••
200/CONNECT 45333 ••••
204/CONNECT 46666 ••••
208/CONNECT 48000 ••••
212/CONNECT 49333 ••••
216/CONNECT 50666 ••••
220/CONNECT 52000 ••••
224/CONNECT 53333 ••••
228/CONNECT 54666 ••••
232/CONNECT 56000 ••••
236/CONNECT 57333 ••••
Adaptive Dialing •••
Wait for 2nd Dial Tone (W) • •
Wait for Answer (@) • •
Fast Dial • •
*Requires @ in dial string; replaces NO CARRIER

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YnSelects power-on/reset
default configuration.
Y0 Use profile 0 setting
in NVRAM
Y1 Use profile 1 setting in
NVRAM
Y2 Use factory
configuration 0.
Y3 Use factory
configuration 1.
Y4 Use factory
configuration 2
ZResets modem.
Z0 Resets modem to
NVRAM profile
selected by Y
command or dip 7.
Z1 Resets modem to
NVRAM profile 0
Z2 Resets modem to
NVRAM profile 1
Z3 Resets modem to
factory default profile
0 (&F0)
Z4 Resets modem to
factory default profile
1 (&F1)
Z5 Resets modem to
factory default profile
2 (&F2)

TECHNICALQUICKREFERENCE
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ExtendedDataCommands
&$ Displays a list of ampersand (&)
commands.
&AnEnables/disables additional result
code subsets (see Xn).
&A0 ARQ result codes disabled
&A1 ARQ result codes enabled
&A2 V.32 modulation indicator added
&A3 Protocol indicators added
LAPM/MNP/NONE (error
control) and V42bis/MNP5
(data compression)
&BnManages modem’s serial port rate.
&B0 Variable, follows connection
rate
&B1 Fixed serial port rate
&B2 Fixed in ARQ mode, variable in
non-ARQ mode
&CnControls Carrier Detect (CD)
signal.
&C0 CD override
&C1 Normal CD operations
&DnControls Data Terminal Ready
(DTR) operations.
&D0 DTR override
&D1 DTR toggle causes online
Command mode
&D2 Normal DTR operations
&D3 Resets on receipt of DTR
&FnLoads a read-only (non-programmable)
factory configuration.
&F0 Generic template
&F1 Hardware flow control
template
&F2 Software flow control template

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&GnSets Guard Tone.
&G0 No guard tone, U.S. and
Canada
&G1 550 Hz guard tone, some
European countries, requires
B0 setting.
&G2 1800 Hz guard tone, U.K.,
requires B0 setting.
&HnSets Transmit Data (TD) flow
control (see also &Rn).
&H0 Flow control disabled
&H1 Hardware flow control,
Clear to Send (CTS)
&H2 Software flow control,
XON/XOFF
&H3 Hardware and software flow
control
&InSets Receive Data (RD) software
flow control (see also &Rn).
&I0 Software flow control
disabled
&I1 XON/XOFF signals to your
modem and remote system
&I2 XON/XOFF signals to your
modem only
&KnEnables/disables data compression.
&K0 Data compression disabled
&K1 Auto enable/disable
&K2 Data compression enabled
&K3 MNP5 compression
disabled

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&MnSets Error Control (ARQ) for
connections at 1200 bps and higher.
&M0 Normal mode, error control
disabled
&M1 Reserved
&M2 Reserved
&M3 Reserved
&M4 Normal/ARQ
&M5 ARQ mode
&NnSets connect speed. If connection
cannot be made at this speed, the
modem will hang up. When used in
conjunction with &Unand &Unis
greater than 0, &Nnsets the
ceiling connect speed. &Unsets
the floor connect speed (See also
the table in the &Un section.)
&N0 Connection speed is
determined by
the remote modem.
&N1 300 bps
&N2 1200 bps
&N3 2400 bps
&N4 4800 bps
&N5 7200 bps
&N6 9600 bps
&N7 12,000 bps
&N8 14,400 bps
&N9 16,800 bps
&N10 19,200 bps
&N11 21,600 bps
&N12 24,000 bps
&N13 26,400 bps
&N14 28,800 bps
&N15 31,200 bps
&N16 33,600 bps
&N17 28,000 bps
&N18 29,333 bps
&N19 30,666 bps

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&N20 32,000 bps
&N21 33,333 bps
&N22 34,666 bps
&N23 36,000 bps
&N24 37,333 bps
&N25 38,666 bps
&N26 40,000 bps
&N27 41,333 bps
&N28 42,666 bps
&N29 44,000 bps
&N30 45,333 bps
&N31 46,666 bps
&N32 48,000 bps
&N33 49,333 bps
&N34 50,666 bps
&N35 52,000 bps
&N36 53,333 bps
&N37 54,666 bps
&N38 56,000 bps
&N39 57,333 bps
&PnSets pulse (rotary) dial make/break
ratio.
&P0 U.S./Canada ratio, 39%/61%
&P1 U.K. ratio, 33%/67%
&RnSets Receive Data (RD) hardware
flow control, Request to Send
(RTS) (see also &Hn).
&R0 Reserved
&R1 Modem ignores RTS
&R2 Received Data to computer
only on RTS
&SnControls Data Set Ready (DSR)
operations.
&S0 DSR override; always ON
&S1 Modem controls DSR

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&TnBegins test modes.
&T0 Ends testing
&T1 Analog Loopback
&T2 Reserved
&T3 Local Digital Loopback
&T4 Enables Remote Digital
Loopback
&T5 Prohibits Remote
Digital Loopback
&T6 Initiates Remote Digital
Loopback
&T7 Remote Digital with
self-test and error
detector
&T8 Analog Loopback with
self-test and error
detector
&UnSets floor connect speed when set
above 0. If the connection cannot
be established above this speed,
the modem will hang up. When
&Unis used in conjunction with
&Nnand &Nnis greater than 0,
&Nnis the ceiling connect speed.
$N=0 &N>0
&U=0 Connects at Connects at
best possible speed defined
by your modem between &Nn
and the remote If the
modem. Connection
NOTE: These cannot be
factory default made above
settings should this speed the
be sufficient modem will
for most users. hang
&U>0 Connects at Connects at any
any speed speed faster than
between &Nn the value of
and &Un. &Un.
&Unspeeds are listed on
the next page.

TECHNICALQUICKREFERENCE
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&U0 No restrictions on the minimum
speed for the connection.
&U1 300 bps
&U2 1200 bps
&U3 2400 bps
&U4 4800 bps
&U5 7200 bps
&U6 9600 bps
&U7 12,000 bps
&U8 14,400 bps
&U9 16,800 bps
&U10 19,200 bps
&U11 21,600 bps
&U12 24,000 bps
&U13 26,400 bps
&U14 28,800 bps
&U15 31,200 bps
&U16 33,600 bps
&U17 28000 bps
&U18 29333 bps
&U19 30666 bps
&U20 32000 bps
&U21 33,333 bps
&U22 34666 bps
&U23 36000 bps
&U24 37,333 bps
&U25 38666 bps
&U26 40000 bps
&U27 41,333 bps
&U28 42,666 bps
&U29 44,000 bps
&U30 45,333 bps
&U31 46666 bps
&U32 48000 bps
&U33 49333 bps
&U34 50666 bps
&U35 52000 bps
&U36 53333 bps
&U37 54666 bps
&U38 56000 bps
&U39 57333 bps

TECHNICALQUICKREFERENCE
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&WnWrites current configuration to
NVRAM templates.
&W0 Modifies the NVRAM 0
template (Y0)
&W1 Modifies the NVRAM 1
template (Y1)
&Yn Sets break handling.
&Y0 Destructive, but doesn’t send
break
&Y1 Destructive, expedited
&Y2 Nondestructive, expedited
&Y3 Nondestructive, unexpedited
&Zn=sWrites phone number string s
to NVRAM at position n (n
= 0−3).
&Zn=L Writes last executed dial
string to NVRAM at position
n(n= 0−3).
&Zn?Displays the phone number stored at
position n (n= 0−3).
&ZL? Displays the last executed dial string.
#CID=nControls Caller ID feature.
#CID=0 Caller ID disabled.
#CID=1 Caller ID enabled
with formatted
information.
#CID=2 Caller ID enabled
with unformatted
information.
+++ Escapes to online-command mode.

TECHNICALQUICKREFERENCE
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DIPSwitches(ExternalModemswithDIPSwitchesOnly)
Note: If a DIP switch is on, it is down. If a DIP switch is off, it is up. Defaults are in italics.
Factory
Switch Setting Function
1OFF Data Terminal Ready (DTR) Override
OFF Normal DTR operations: computer must provide DTR signal for the
modem to accept commands; dropping DTR terminates a call
ON Modem ignores DTR (Override)
2OFF Verbal/Numeric Result Codes
OFF Verbal (word) results
ON Numeric results
3ON Result Code Display
OFF Suppresses result codes
ON Enables result codes
4OFF Command Mode Local Echo Suppression
OFF Displays keyboard commands
ON Suppresses echo
5ON Auto Answer Suppression
OFF Modem answers on first ring, or higher if specified in NVRAM
ON Disables auto answer