DIRECT 2400 modem/telephone/ISDN Settings and Configuration

U.S. ROBOTICS, INC.

DIRECT 2400

Card Type
Modem (asynchronous)
Chip Set
U.S.Robotics
Maximum Data Rate
2400bps
Data Bus
External
Data Modulation Protocol
Unidentified

CONNECTIONS
Function
Label
Function
Label
Line out/in - Unidentified
CN1
DC power - Unidentified
CN4
Line in/out - Unidentified
CN2
Power switch - Unidentified
SW1
RS-232/422 - Unidentified
CN3

USER CONFIGURABLE SETTINGS
Setting
Label
Position
í DTR normal
SW1/1
On
DTR Forced high
SW1/1
Off
í Verbose result codes
SW1/2
Off
Numeric result codes
SW1/2
On
í Result codes enabled
SW1/3
On
Result codes disabled
SW1/3
Off
í Commands displayed
SW1/4
Off
Commands not displayed
SW1/4
On
í Auto-answer mode enabled
SW1/5
Off
Auto-answer mode disabled
SW1/5
On
í CD signal forced high
SW1/6
On
CD signal normal
SW1/6
Off
í RJ-11 jack
SW1/7
Off
RJ-12, RJ-13 jack
SW1/7
On
í Smart mode
SW1/8
On
Dumb mode
SW1/8
Off

DIAGNOSTIC LED(S)
LED
Color
Status
Condition
Left
Green
On
Modem is in data mode
Left
Green
Off
Modem is not data mode
Left
Red
On
Modem is in analog loopback test mode
Left
Red
Blinking
Power on/self-test in progress
Right
Green
On
Carrier signal detected/ready to send data
Right
Green
Off
Carrier signal not detected/not ready to send data
Right
Red
Off
Modem is not receiving data/not displaying result codes
Right
Red
Blinking
Modem is receiving data/display result codes

Proprietary AT Command Set

ABORT
Type:
Immediate
Format:
Any key
Description:
Aborts answering/originating a call; modem hangs up.

ANSWER
Type:
Immediate
Format:
AT [cmds] A
Description:
Enables manual answer mode, the modem goes off-hook; pressing any key will abort.

ANSWER SEQUENCE
Type:
Configuration
Format:
AT [cmds] Bn [cmds]
Description:
Selects the answer sequence the modem will use
Command
Function
í B0
ITU-T answer sequence enabled
B1
Bell answer sequence enabled

ATTENTION
Type:
Immediate
Format:
AT [cmds]
Description:
Tells the modem that a command follows or use alone to test OK result code

CLOCK
Type:
Configuration
Format:
AT [cmds] Kn [cmds]
Description:
Displays connection duration or real time
Command
Function
í K0
Connection duration displayed in ATI3
K1
Real time displayed in ATI3. To set clock (military time) use ATI3=HH:MM:SSK1.

DIAL
Type:
Immediate
Format:
AT [cmds] D<#> [cmds]
Example:
ATDT 443-3388,,,1111;
Description:
Dials telephone number according to any modifiers included in the string
Note:
Any combination of modifiers can be used to produce the desired dial functions in sequence.
Command
Function
í P
Pulse dialing enabled
T
Tone dialing enabled
,
Dialing paused for 2 seconds
;
Modem returned to command state after dialing. Can only be placed at the end of the dial command.
"
Dials letters as if they were numbers; ATDT"GOMICRO"
!
Flash function initiated
@
Dial, wait for quiet answer, then continue to execute the rest of the dial string
W
Dial, wait for second dial tone, then continue to execute the rest of the dial string
R
Answer mode enabled; originate mode disabled following handshake initiation.

ECHO
Type:
Configuration
Format:
AT [cmds] En [cmds]
Description:
Controls echo function; display keyboard commands when enabled.
Command
Function
E0
Echo function disabled
E1
Echo function enabled

ECHO - ON-LINE
Type:
Configuration
Format:
AT [cmds] Fn [cmds]
Description:
Selects whether data sent while in data mode are echoed
Command
Function
F0
Local echo enabled
í F1
Local echo disabled

ESCAPE SEQUENCE
Type:
Immediate
Format:
+++AT [cmds] <CR>
Description:
Initiates the escape sequence and returns the modem to the on-line command state if it receives three escape characters set in S2 within the time allotted by S12.
Note: Do not precede this command with AT.

GUARD TONE
Type:
Configuration
Format:
AT [cmds] &Gn [cmds]
Description:
Commands the modem to transmit a guard tone
Note: Used primarily for international data transmission
Command
Function
í &G0
Guard tone disabled
&G1
550Hz guard tone enabled
&G2
1800Hz guard tone enabled

HELP SCREEN - CONTROLS
Type:
Immediate
Format:
<Ctrl> C, K or S
Description:
Cancel; or stop/restart scrolling of help screens
Command
Function
<Ctrl> C
Cancel display of help screen
<Ctrl> K
Cancel display of help screen
<Ctrl> S
Stop/restart scrolling of help screens

HOOK CONTROL
Type:
Immediate
Format:
AT [cmds] Hn [cmds]
Description:
Selects whether the modem is on-hook or off-hook
Command
Function
H0
Modem commanded to go on-hook (hang-up)
H1
Modem commanded to go off-hook (pick-up)

LIST DIAL COMMANDS
Type:
Immediate
Format:
AT [cmds] D$ [cmds]
Description:
Displays dial commands

LIST S-REGISTERS
Type:
Immediate
Format:
AT [cmds] S$ [cmds]
Description:
Displays the S-registers

ON-LINE
Type:
Immediate
Format:
AT [cmds] O [cmds]
Description:
Returns to on-line command (data transmission) mode.
Note: The O command must be placed at the end of the command string.

ON-LINE HELP
Type:
Immediate
Format:
AT [cmds] $ [cmds]
Description:
On-line help; displays basic command list.

PRODUCT CODE
Type:
Register
Format:
AT [cmds] S14 [cmds]
Description:
Stores product code, displayed in ATI0.

PULSE DIALING
Type:
Configuration
Format:
AT [cmds] P [cmds]
Description:
Enables pulse dialing
Note: This command can be duplicated with the P modifier in the D (Dial) command.

PULSE DIALING RATIO
Type:
Configuration
Format:
AT [cmds] &Pn [cmds]
Description:
Selects pulse dial make/break ratio
Command
Function
&P0
39/61ms at 10pps (North America)
&P1
33/67ms at 10pps (Europe)

RECEIVE-ONLY
Type:
Configuration
Format:
AT [cmds] Cn [cmds]
Description:
Sets receive-only; used if modem is attached to additional monitoring-only systems
Command
Function
C0
Disables transmitter
í C1
Enables transmitter

REPEAT COMMAND STRING
Type:
Configuration
Format:
AT [cmds] > [cmds]
Example:
AT>DT5551212 or ATDT5551212>
Description:
Causes modem to repeat command string until a keyboard key is pressed
Note: If used before or after the ATD command, the modem will redial the number until a connection is established or a maximum of ten attempts is reached.

REPEAT PREVIOUS COMMAND
Type:
Immediate
Format:
A/
Description:
Repeats previous command; mainly used for redial.
Note: Do not precede this command with AT, or follow it with <CR>.

REPORT INFORMATION
Type:
Immediate
Format:
AT [cmds] In [cmds]
Description:
Displays information requested
Command
Function
I0
Reports product code
I1
Reports ROM checksum
I2
Reports RAM test (OK or ERROR, followed by OK)
I3
Reports connection duration and real time
I4
Reports current command settings

RESULT CODES
Type:
Configuration
Format:
AT [cmds] Qn [cmds]
Description:
Enables modem to send result codes to the DTE
Command
Function
Q0
Result code sending enabled
Q1
Result code sending disabled

RESULT CODE FORMAT
Type:
Configuration
Format:
AT [cmds] Vn [cmds]
Description:
Selects word or numeric format for information-text and result codes
Command
Function
V0
Numeric format enabled
V1
Verbose (word) format enabled

SELECT CALL PROGRESS RESULT CODES
Type:
Configuration
Format:
AT [cmds] Xn [cmds]
Description:
Enables selection of tone detection and associated result code format options
Command
Function
X0
Busy and dial tone detection disabled; result codes 0-5 and 10 enabled.
í X1
Busy and dial tone detection disabled; result codes 0-5 and 10 enabled
X2
Busy tone detection disabled, dial tone detection enabled; result codes 0-6 and 10 enabled; also adaptive dialing, and fast dialing enabled.
X3
Busy tone detection enabled, dial tone detection disabled; result codes 0-5, 7-10 enabled; also adaptive dialing, wait for second dial tone, and wait for answer enabled.
X4
Busy and dial tone detection enabled; result codes 0-10 enabled; also adaptive dialing, wait for second dial tone, wait for answer, and fast dialing enabled.
X5
Busy tone detection enabled, dial tone detection disabled; result codes 0-5, 7-12 enabled; also adaptive dialing, wait for second dial tone, and wait for answer enabled.
X6
Busy and dial tone detection enabled; result codes 0-12 enabled; also adaptive dialing, wait for second dial tone, wait for answer, and fast dialing enabled.
Note: Valid numeric result codes; 0-8, and 10-12.

SOFT RESET
Type:
Immediate
Format:
AT [cmds] Zn [cmds]
Description:
Restores modem software default profile

SPEAKER MODE
Type:
Configuration
Format:
AT [cmds] Mn [cmds]
Description:
Selects various speaker options
Command
Function
M0
Speaker disabled
í M1
Speaker enabled until carrier signal detected
M2
Speaker enabled
M3
Speaker enabled following dialing, then disabled after carrier signal detected.

STATUS-REGISTER
Type:
Configuration
Format:
Read: AT [cmds] Sn? [cmds]
Write: AT [cmds] Sn=x [cmds]
Description:
Writes to or reads from a specified register

TEST MODES
Type:
Configuration
Format:
AT [cmds] S16=n [cmds]
Description:
Controls loopback tests, analog, digital, dial and self tests.
Command
Function
S16=0
Testing disabled
S16=1
Local analog loopback enabled
S16=2
Dial test (Factory testing only)
S16=4
Test pattern enabled (transmitted on CONNECT, either on answering or originate)
S16=5
Local analog loopback and test pattern enabled

TONE DIALING
Type:
Configuration
Format:
AT [cmds] T [cmds]
Description:
Enables tone dialing mode
Note: This command can be duplicated with the T modifier in the D (Dial) command.

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Card Type	Modem (asynchronous)
Chip Set	U.S.Robotics
Maximum Data Rate	2400bps
Data Bus	External
Data Modulation Protocol	Unidentified

CONNECTIONS
Function	Label		Function		Label
Line out/in - Unidentified		CN1		DC power - Unidentified		CN4
Line in/out - Unidentified		CN2		Power switch - Unidentified		SW1
RS-232/422 - Unidentified		CN3

USER CONFIGURABLE SETTINGS
Setting	Label	Position
í DTR normal	SW1/1	On
DTR Forced high	SW1/1	Off
í Verbose result codes	SW1/2	Off
Numeric result codes	SW1/2	On
í Result codes enabled	SW1/3	On
Result codes disabled	SW1/3	Off
í Commands displayed	SW1/4	Off
Commands not displayed	SW1/4	On
í Auto-answer mode enabled	SW1/5	Off
Auto-answer mode disabled	SW1/5	On
í CD signal forced high	SW1/6	On
CD signal normal	SW1/6	Off
í RJ-11 jack	SW1/7	Off
RJ-12, RJ-13 jack	SW1/7	On
í Smart mode	SW1/8	On
Dumb mode	SW1/8	Off

DIAGNOSTIC LED(S)
LED	Color	Status	Condition
Left	Green	On	Modem is in data mode
Left	Green	Off	Modem is not data mode
Left	Red	On	Modem is in analog loopback test mode
Left	Red	Blinking	Power on/self-test in progress
Right	Green	On	Carrier signal detected/ready to send data
Right	Green	Off	Carrier signal not detected/not ready to send data
Right	Red	Off	Modem is not receiving data/not displaying result codes
Right	Red	Blinking	Modem is receiving data/display result codes

ABORT
Type:	Immediate
Format:	Any key
Description:	Aborts answering/originating a call; modem hangs up.

ANSWER
Type:	Immediate
Format:	AT [cmds] A
Description:	Enables manual answer mode, the modem goes off-hook; pressing any key will abort.

ANSWER SEQUENCE
Type:	Configuration
Format:	AT [cmds] Bn [cmds]
Description:	Selects the answer sequence the modem will use
Command	Function
í B0	ITU-T answer sequence enabled
B1	Bell answer sequence enabled

ATTENTION
Type:	Immediate
Format:	AT [cmds]
Description:	Tells the modem that a command follows or use alone to test OK result code

CLOCK
Type:	Configuration
Format:	AT [cmds] Kn [cmds]
Description:	Displays connection duration or real time
Command		Function
í K0		Connection duration displayed in ATI3
K1		Real time displayed in ATI3. To set clock (military time) use ATI3=HH:MM:SSK1.

DIAL
Type:	Immediate
Format:	AT [cmds] D<#> [cmds]
Example:	ATDT 443-3388,,,1111;
Description:	Dials telephone number according to any modifiers included in the string
Note:	Any combination of modifiers can be used to produce the desired dial functions in sequence.
Command	Function
í P	Pulse dialing enabled
T	Tone dialing enabled
,	Dialing paused for 2 seconds
;	Modem returned to command state after dialing. Can only be placed at the end of the dial command.
"	Dials letters as if they were numbers; ATDT"GOMICRO"
!	Flash function initiated
@	Dial, wait for quiet answer, then continue to execute the rest of the dial string
W	Dial, wait for second dial tone, then continue to execute the rest of the dial string
R	Answer mode enabled; originate mode disabled following handshake initiation.

ECHO
Type:	Configuration
Format:	AT [cmds] En [cmds]
Description:	Controls echo function; display keyboard commands when enabled.
Command	Function
E0	Echo function disabled
E1	Echo function enabled

ECHO - ON-LINE
Type:	Configuration
Format:	AT [cmds] Fn [cmds]
Description:	Selects whether data sent while in data mode are echoed
Command	Function
F0	Local echo enabled
í F1	Local echo disabled

ESCAPE SEQUENCE
Type:	Immediate
Format:	+++AT [cmds] <CR>
Description:	Initiates the escape sequence and returns the modem to the on-line command state if it receives three escape characters set in S2 within the time allotted by S12.
Note: Do not precede this command with AT.

GUARD TONE
Type:	Configuration
Format:	AT [cmds] &Gn [cmds]
Description:	Commands the modem to transmit a guard tone
Note: Used primarily for international data transmission
Command	Function
í &G0	Guard tone disabled
&G1	550Hz guard tone enabled
&G2	1800Hz guard tone enabled

HELP SCREEN - CONTROLS
Type:	Immediate
Format:	<Ctrl> C, K or S
Description:	Cancel; or stop/restart scrolling of help screens
Command		Function
<Ctrl> C		Cancel display of help screen
<Ctrl> K		Cancel display of help screen
<Ctrl> S		Stop/restart scrolling of help screens

HOOK CONTROL
Type:	Immediate
Format:	AT [cmds] Hn [cmds]
Description:	Selects whether the modem is on-hook or off-hook
Command	Function
H0	Modem commanded to go on-hook (hang-up)
H1	Modem commanded to go off-hook (pick-up)

LIST DIAL COMMANDS
Type:	Immediate
Format:	AT [cmds] D$ [cmds]
Description:	Displays dial commands

LIST S-REGISTERS
Type:	Immediate
Format:	AT [cmds] S$ [cmds]
Description:	Displays the S-registers

ON-LINE
Type:	Immediate
Format:	AT [cmds] O [cmds]
Description:	Returns to on-line command (data transmission) mode.
Note: The O command must be placed at the end of the command string.

ON-LINE HELP
Type:	Immediate
Format:	AT [cmds] $ [cmds]
Description:	On-line help; displays basic command list.

PRODUCT CODE
Type:	Register
Format:	AT [cmds] S14 [cmds]
Description:	Stores product code, displayed in ATI0.

PULSE DIALING
Type:	Configuration
Format:	AT [cmds] P [cmds]
Description:	Enables pulse dialing
Note: This command can be duplicated with the P modifier in the D (Dial) command.

PULSE DIALING RATIO
Type:	Configuration
Format:	AT [cmds] &Pn [cmds]
Description:	Selects pulse dial make/break ratio
Command	Function
&P0	39/61ms at 10pps (North America)
&P1	33/67ms at 10pps (Europe)

RECEIVE-ONLY
Type:	Configuration
Format:	AT [cmds] Cn [cmds]
Description:	Sets receive-only; used if modem is attached to additional monitoring-only systems
Command		Function
C0		Disables transmitter
í C1		Enables transmitter

REPEAT COMMAND STRING
Type:	Configuration
Format:	AT [cmds] > [cmds]
Example:	AT>DT5551212 or ATDT5551212>
Description:	Causes modem to repeat command string until a keyboard key is pressed
Note: If used before or after the ATD command, the modem will redial the number until a connection is established or a maximum of ten attempts is reached.

REPEAT PREVIOUS COMMAND
Type:	Immediate
Format:	A/
Description:	Repeats previous command; mainly used for redial.
Note: Do not precede this command with AT, or follow it with <CR>.

REPORT INFORMATION
Type:	Immediate
Format:	AT [cmds] In [cmds]
Description:	Displays information requested
Command	Function
I0	Reports product code
I1	Reports ROM checksum
I2	Reports RAM test (OK or ERROR, followed by OK)
I3	Reports connection duration and real time
I4	Reports current command settings

RESULT CODES
Type:	Configuration
Format:	AT [cmds] Qn [cmds]
Description:	Enables modem to send result codes to the DTE
Command	Function
Q0	Result code sending enabled
Q1	Result code sending disabled

RESULT CODE FORMAT
Type:	Configuration
Format:	AT [cmds] Vn [cmds]
Description:	Selects word or numeric format for information-text and result codes
Command	Function
V0	Numeric format enabled
V1	Verbose (word) format enabled

SELECT CALL PROGRESS RESULT CODES
Type:	Configuration
Format:	AT [cmds] Xn [cmds]
Description:	Enables selection of tone detection and associated result code format options
Command	Function
X0	Busy and dial tone detection disabled; result codes 0-5 and 10 enabled.
í X1	Busy and dial tone detection disabled; result codes 0-5 and 10 enabled
X2	Busy tone detection disabled, dial tone detection enabled; result codes 0-6 and 10 enabled; also adaptive dialing, and fast dialing enabled.
X3	Busy tone detection enabled, dial tone detection disabled; result codes 0-5, 7-10 enabled; also adaptive dialing, wait for second dial tone, and wait for answer enabled.
X4	Busy and dial tone detection enabled; result codes 0-10 enabled; also adaptive dialing, wait for second dial tone, wait for answer, and fast dialing enabled.
X5	Busy tone detection enabled, dial tone detection disabled; result codes 0-5, 7-12 enabled; also adaptive dialing, wait for second dial tone, and wait for answer enabled.
X6	Busy and dial tone detection enabled; result codes 0-12 enabled; also adaptive dialing, wait for second dial tone, wait for answer, and fast dialing enabled.
Note: Valid numeric result codes; 0-8, and 10-12.