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- COURIER HIGH SPEED MODEMS
-
-
-
- APPENDIX C. ALPHABETICAL COMMAND SUMMARY
-
-
-
- Additional command summaries are on the
- bottom panel of the modem and in the
- Quick-Reference Card.
-
- REQUIREMENTS
-
- 1. Type commands in either upper
- or lower case, not a combination.
- 2. All commands except A/, A> and
- +++ are preceded by the AT prefix
- and are executed with the
- Enter/Carriage Return key
- (<Enter>).
- 3. Command length = 40 characters
- maximum. The modem doesn't count
- the AT prefix, Carriage Return
- character, or spaces. It counts
- but doesn't act on punctuation such
- as hyphens and parentheses.
- 4. A missing numeric parameter is
- assumed to be zero, as in the
- command to hang up: ATH <Enter> is
- the equivalent of ATH0 <Enter>.
-
-
- BASIC COMMAND SET
-
- & See the Extended Command Summary that
- follows this Basic Set.
-
- % See the Percent Command Summary that
- follows the Extended Command Summary.
-
- A Force Answer mode when the modem hasn't
- received an incoming call.
-
- A/ Re-execute the last issued command one
- time. A/ doesn't take the AT prefix or
- a Carriage Return.
-
- Command Summary C-1
-
- COURIER HIGH SPEED MODEMS
-
-
-
- A> Re-execute the last issued command
- continuously until canceled by pressing
- <any key>. Dial strings are re-executed
- ten times, after which execution
- terminates. A> doesn't take the AT
- prefix or a Carriage Return.
-
- Any key Terminate current dialing operation
- resulting from an issued Dial command;
- terminate Repeat mode (> or A>).
-
- AT Attention: lets the modem know commands
- are being issued to it. Must precede
- all other commands except A/, A> and
- +++.
-
- Bn Handshake options.
-
- B0 a) V.32 bis modulation (includes
- V.32 answer tones). Courier V.32
- bis: Default. Courier HST Dual
- Standard: Required to answer V.32
- bis calls. To call V.32 bis modems,
- may be set to B0 or B1. HST
- modulation remains enabled. Courier
- HST: See next paragraph. HST
- modulation remains enabled.
-
- b) CCITT V.25 answer sequence.
- Required for all Courier modems
- answering overseas calls at 1200 bps
- and above.
-
- B1 a) HST modulation (no V.32 bis
- answer tones). Courier HST:
- Default. Courier HST Dual Standard:
- Default. Also calls, but does not
- answer, V.32 bis modems. Courier
- V.32 bis: Calls, but does not
- answer, V.32 bis modems.
-
- b) Bell answer tone, United States
- and Canada.
-
- C-2 Command Summary
-
- COURIER HIGH SPEED MODEMS
-
-
-
- Cn Transmitter enabled/disabled.
-
- C0 Transmitter disabled; receive-only
- condition.
-
- C1 Transmitter enabled (Default).
-
- D Dial the number that follows and enter
- Originate mode. Optional parameters:
-
- P Pulse dial (Default).
-
- T Touch-Tone dial.
-
- , (Comma) Pause for 2 seconds.
-
- ; Return to Command mode after
- dialing.
-
- " Dial the letters that follow.
-
- ! Transfer call (flash switch-hook).
-
- W Wait for second dial tone (with X3
- or higher).
-
- @ Wait for an answer (with X3 or
- higher).
-
- R Reverse frequencies.
-
- DL Dial the last-dialed number.
-
- DSn Dial the phone number stored in NVRAM at
- position n (n = 0-3).
-
- En Command mode local echo (display) of
- keyboard commands ON/OFF. DIP switch 4
- is factory set to Command mode echo ON.
-
- E0 Local echo OFF.
-
- E1 Local echo ON.
-
- Command Summary C-3
-
- COURIER HIGH SPEED MODEMS
-
-
-
- Fn Online local echo of transmitted data
- ON/OFF. Sometimes referred to as the
- Duplex setting.
-
- F0 Local echo ON. Sometimes called
- Half Duplex. Modem sends a copy to
- your screen of data it sends to the
- remote system.
-
- F1 Local echo OFF (Default). Sometimes
- called Full Duplex. Receiving
- system may send a remote echo of
- data it receives.
-
- Hn On/off hook control.
-
- H0 Hang up (go on hook).
-
- H1 Go off hook.
-
- In Inquiry.
-
- I0 Display product code.
-
- I1 Display results of ROM checksum.
-
- I2 Display results of RAM test.
-
- I3 Display call duration or real time
- (see Kn).
-
- I4 Display current modem settings.
-
- I5 Display nonvolatile random access
- memory (NVRAM) settings.
-
- I6 Display link diagnostics.
-
- I7 Display product configuration.
-
- Kn Modem clock operation: Call-duration or
- Real-time mode.
-
-
- C-4 Command Summary
-
- COURIER HIGH SPEED MODEMS
-
-
-
- K0 Return call duration at ATI3
- (Default).
-
- K1 Return actual time at ATI3. Clock
- is set using ATI3=HH:MM:SS K1.
-
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- Command Summary C-5
-
- COURIER HIGH SPEED MODEMS
-
-
-
- Mn Monitor (speaker) control.
-
- M0 Speaker always OFF.
-
- M1 Speaker ON until carrier is
- established (Default).
-
- M2 Speaker always ON.
-
- M3 Speaker ON after last digit dialed
- and until carrier is established.
-
- O Return online after command execution.
-
- O0 Return online (normal).
-
- O1 Return online and retrain. Use if
- there were errors in a non-ARQ data
- transfer.
-
- O2 Return online, initiate a 2400 bps
- speed shift, and drop down to 1200
- bps. Applies only to calls at 2400
- bps, and may be used if the remote
- modem is a V.22 bis modem and ATO1
- didn't work. Used mainly for
- testing purposes.
-
- P Pulse dial (Default).
-
- Qn Quiet mode: result codes
- displayed/suppressed. DIP switch 3 is
- factory set for result code display.
-
- Q0 Result codes displayed.
-
- Q1 Result codes suppressed (quiet).
-
- Q2 Result codes suppressed in Answer
- mode.
-
-
-
-
- C-6 Command Summary
-
- COURIER HIGH SPEED MODEMS
-
-
-
- Sr=n Set S-Register value: r is any S-
- Register; n must be a decimal number
- between 0 and 255.
-
- Sr.b = n Alternative command for setting bit-
- mapped registers: r is the bit-mapped
- register; .b is the bit; n is 0 (off) or
- 1 (on).
-
- Sr? Query contents of register r.
-
- T Tone dial.
-
- Vn Return result codes in words or numbers
- (Verbal/Numeric mode). DIP switch 2 is
- factory set for verbal result codes.
-
- V0 Numeric mode.
-
- V1 Verbal mode.
-
- Xn Result code set options. Use the
- following table (Default = X1, Extended
- set, codes 0-5, 10, 13, 18).
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- Command Summary C-7
-
- COURIER HIGH SPEED MODEMS
-
-
-
- Setting
-
- Result Codes X0 X1 X2 X3 X4
- X5 X6 X7
-
- 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 + + +
- 12/VOICE + +
- 13/CONNECT 9600 + + + + + + +
- 18/CONNECT 4800 + + + + + + +
- 20/CONNECT 7200 + + + + + + +
- 21/CONNECT 12000 + + + + + + +
- 25/CONNECT 14400 + + + + + + +
-
- Functions
-
- Adaptive Dialing + + + + +
- +
- Wait for 2nd Dial Tone (W) +
- + + + +
- Wait for Answer (@) + + + +
- +
- Fast Dial + + + +
-
- NOTE: Use &A0 or &A1 to disable/enable
- the following ARQ result codes. The
- default is &A1, ARQ codes (messages 14
- to 19) enabled.
- 14/CONNECT /ARQ (only when modem is
- set to X0)
- 15/CONNECT 1200/ARQ
- 16/CONNECT 2400/ARQ
- 17/CONNECT 9600/ARQ
-
- C-8 Command Summary
-
- COURIER HIGH SPEED MODEMS
-
-
-
- 19/CONNECT 4800/ARQ
- Use &A2 to add HST or V.32 modulation
- indicators, as well as ARQ and non-ARQ
- status, to the result codes.
-
- Use &A3 to add error control protocol
- indicators (LAPM, HST, MNP, SYNC, or
- NONE) and data compression type (V42BIS
- or MNP5) to the result codes.
-
- Z Software reset to NVRAM settings if DIP
- switch 10 is UP, to factory settings if
- DIP switch 10 is DOWN. Also initiates
- new settings of DIP switches 2-5, 7 and
- 9.
-
- +++ Escape code, preceded and followed by a
- guard time of at least one second of no
- data transmission. The modem responds
- to +++ by returning to Command mode and
- doing the following:
-
- DIP switch 9 UP (OFF, Factory setting):
- Hangs up and sends NO CARRIER result
- code
-
- DIP switch 9 DOWN (ON): Retains phone
- line connection and sends OK result code
-
- > Repeat the command continuously until
- canceled by pressing <any key>. If used
- in a Dial string, automated redialing
- terminates after ten attempts.
-
- / (Slash) Pause 125 milliseconds.
-
- $ Help Basic command summary request.
-
- &$ Help Extended command summary request.
-
- D$ Help Dial command summary request.
-
- S$ Help S-Register summary request.
-
- Command Summary C-9
-
- COURIER HIGH SPEED MODEMS
-
-
-
- <Ctrl>-S Stop/restart display of Help
- screens.
-
- <Ctrl>-C Cancel display of Help screens.
- or
- <Ctrl>-K
-
-
- AMPERSAND COMMAND SET
-
- &An Enable/disable additional result code
- subsets. See the X command in the
- previous section.
-
- &A0 ARQ result codes disabled.
-
- &A1 ARQ result codes enabled.
- Default.
-
- &A2 Additional HST or V32 modulation
- indicator.
-
- &A3 Additional error control indicator
- (LAPM, HST, MNP, SYNC, or NONE) and
- data compression type (V42BIS or
- MNP5).
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- C-10 Command Summary
-
- COURIER HIGH SPEED MODEMS
-
-
-
- &Bn Data Rate, terminal-to-modem (DTE/DCE).
-
- &B0 DTE/DCE rate switches to follow
- connection rate (Default).
-
- &B1 DTE/DCE rate remains fixed at the
- DTE setting. Allowable rates are
- 38.4K, 19.2K, 9600, 4800, 2400,
- 1200, 300 bps.
-
- &B2 Shift to the user-defined fixed,
- higher DTE rate for ARQ calls,
- follow the connection rate for non-
- ARQ calls. Answer mode only.
-
- &Cn Carrier Detect (CD) signal, modem-to-
- DTE. DIP switch 6 is factory set so
- that the modem controls CD and the
- override is disabled.
-
- &C0 CD override (CD always ON).
-
- &C1 Modem sends CD signal when it
- connects with another modem, drops
- CD on disconnect.
-
- &Dn Data Terminal Ready (DTR) signal, DTE-
- to-modem. DIP switch 1 is factory set
- for normal DTR operations and the
- override is disabled.
-
- &D0 DTR override (DTR always ON).
-
- &D1 Reserved.
-
- &D2 Terminal must send DTR for modem to
- accept commands. Dropping DTR
- terminates a call.
-
- &F Load factory (ROM) settings into random
- access memory (RAM).
-
-
-
- Command Summary C-11
-
- COURIER HIGH SPEED MODEMS
-
-
-
- &Gn Guard tone as part of answer sequence,
- for 2400/1200 bps calls from overseas.
-
- &G0 No guard tone, U.S., Canada
- (Default).
-
- &G1 550 Hz guard tone, some European
- countries.
-
- &G2 1800 Hz guard tone, U.K., some
- Commonwealth countries. Requires B0
- setting.
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- C-12 Command Summary
-
- COURIER HIGH SPEED MODEMS
-
-
-
- &Hn Transmit Data flow control.
-
- &H0 Flow control disabled (Default).
-
- &H1 Hardware (Clear to Send) flow
- control.
-
- &H2 Software (XON/XOFF) flow control.
-
- &H3 Hardware and software flow control.
-
- &In Received Data software flow control.
-
- &I0 Flow control disabled (Default).
-
- &I1 XON/XOFF to local modem and remote
- computer.
-
- &I2 XON/XOFF to local modem only.
-
- &I3 Host mode, Hewlett Packard protocol.
-
- &I4 Terminal mode, Hewlett Packard
- protocol.
-
- &I5 Same as &I2 in ARQ mode. In non-ARQ
- mode, XON/XOFF to remote modem for
- link flow control.
-
- &Kn Data compression.
-
- &K0 Disabled.
-
- &K1 Auto enable/disable (Default).
- Disabled if modem is set to &B0 and
- DTE rate switches to match link
- rate.
-
- &K2 Enabled regardless of &Bn setting.
-
- &K3 Selective data compressionΩMNP Level
- 5 disabled.
-
-
- Command Summary C-13
-
- COURIER HIGH SPEED MODEMS
-
-
-
- &Ln Normal/Leased phone line.
-
- &L0 Normal phone line (Default).
-
- &L1 Leased line; enables the modem to
- reconnect if disconnected.
-
- &Mn Error Control (ARQ) and Synchronous
- Operation.
-
- &M0 Normal asynchronous mode, error
- control disabled.
-
- &M1 Synchronous mode, error control
- disabled.
-
- &M2 Reserved.
-
- &M3 Reserved.
-
- &M4 Normal/ARQ asynchronous mode
- (Default). Normal connection if ARQ
- connection cannot be made.
-
- &M5 ARQ asynchronous mode. Modem hangs
- up if ARQ connection cannot be made.
-
- &Nn Link Rate (DCE/DCE) variable or fixed.
- With fixed link rate, modem hangs up if
- called or calling modem is operating at
- a different rate.
-
- &N0 Variable link operations (Default).
- Modem negotiates highest possible
- link rate with remote modem.
-
- &N1 300 bps.
-
- &N2 1200 bps.
-
- &N3 2400 bps.
-
- &N4 4800 bps.
-
- C-14 Command Summary
-
- COURIER HIGH SPEED MODEMS
-
-
-
- &N5 7200 bps.
-
- &N6 9600 bps.
-
- &N7 12K bps
-
- &N8 14.4K bps
-
- &Pn Pulse dialing make/break ratio.
-
- &P0 U.S./Canada make/break ratio
- (Default).
-
- &P1 U.K./some Commonwealth countries
- make/break ratio.
-
- &Rn Received Data hardware (RTS) flow
- control.
-
- &R0 Delay before modem responds to DTE's
- RTS signal with CTS signal. Delay
- is set in Register S26.
-
- &R1 Ignore RTS (Default).
-
- &R2 Received data sent to DTE only when
- RTS is high; used only if DTE
- supports RTS signaling.
-
- &Sn Data Set Ready (DSR) operations.
-
- &S0 DSR override, always ON (Default).
-
- &S1 Modem sends DTE a DSR signal when it
- senses a modem tone on the phone
- line.
-
- &S2 On loss of carrier, modem sends DTE
- a pulsed DSR signal with Clear to
- Send (CTS) following Carrier Detect
- (CD).
-
-
-
- Command Summary C-15
-
- COURIER HIGH SPEED MODEMS
-
-
-
- &S3 This is the same as &S2, but without
- CTS following CD.
-
- &Tn Modem testing.
-
- &T0 End test.
-
- &T1 Initiate Analog Loopback (AL)
- testing.
-
- &T2 Reserved.
-
- &T3 Initiate Local Digital Loopback
- (LDL) testing.
-
- &T4 Grant Remote Digital Loopback (RDL).
-
- &T5 Prohibit RDL.
-
- &T6 Initiate RDL testing.
-
- &T7 Initiate RDL with self-test and
- error correction.
-
- &T8 Initiate AL with self-test and error
- correction.
-
- &W Write current settings to nonvolatile
- random access memory (NVRAM).
-
- &Xn Synchronous Timing Source. This
- specifies whether the modem or DTE
- generates the timing signals for the
- Transmit clock during a synchronous
- call.
-
- &X0 Modem's Transmit clock is the source
- (Default).
-
- &X1 DTE is the source.
-
- &X2 Modem's Receiver clock is the
- source; valid only in V.32 bis mode
-
- C-16 Command Summary
-
- COURIER HIGH SPEED MODEMS
-
-
-
- or for 2400/1200-bps connections in
- HST mode.
-
- &Yn Break handling. Destructive Breaks
- clear the buffer; expedited Breaks are
- sent immediately to the remote system.
- Under data compression, destructive
- Breaks cause both modems to reset their
- compression tables.
-
- &Y0 Destructive, don't send Break.
-
- &Y1 Destructive, expedited (Default).
-
- &Y2 Nondestructive, expedited.
-
- &Y3 Nondestructive, unexpedited; modem
- sends Break in sequence with data
- received from DTE.
-
- &Zn = s Write the following Dial string (s)
- to NVRAM at position n
- (n = 0-3).
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- Command Summary C-17
-
- COURIER HIGH SPEED MODEMS
-
-
-
- &Zn? Display the phone number stored in NVRAM
- at position n
- (n = 0-3).
-
-
- PERCENT COMMAND SET
-
- %Rn Rack Controller Unit (RCU) access. For
- use with USRobotics Total Control Modem
- Management Systems.
-
- %R0 Normal operations, RCU access
- disabled (Default).
-
- %R1 RCU access enabled.
-
- %T Touch-Tone Recognition mode enabled.
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- C-18 Command Summary
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