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US Robotics 005687-03 Reference Manual

Technical quick reference
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This section includes information about:
Lights (external modems only)................................................................
Typing Commands.................................................................................
Basic Data Commands ..........................................................................
Extended Data Commands...................................................................
DIP Switches......................................................................................
S-Registers .........................................................................................
Fax Commands ...................................................................................
The Serial Interface (cable information) ................................................
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ECHNICAL
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Summary of Contents for US Robotics 005687-03

  • Page 1: Table Of Contents

    ECHNICAL UICK EFERENCE This section includes information about: Lights (external modems only)..............Typing Commands................. Basic Data Commands ................Extended Data Commands..............DIP Switches..................S-Registers ..................Fax Commands ................... The Serial Interface (cable information) ..........

  • Page 2: Lights (External Modems Only)

    ECHNICAL UICK EFERENCE Lights (External Modems Only) 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.
  • Page 3 ECHNICAL UICK EFERENCE 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.

  • Page 4: Typing Commands

    ECHNICAL UICK EFERENCE Typing Commands 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.

  • Page 5: Basic Data Commands

    ECHNICAL UICK EFERENCE Basic Data Commands Re-executes the last issued <control key>S command. Used mainly to Stop or restart help screens. redial. Does not require the <control key>C AT prefix or a Carriage Return. <control key>K A> Re-executes the last issued Stop help screens.
  • Page 6 ECHNICAL UICK EFERENCE U.S./ITU-T answer are stored with the &Zn=s sequence. command. Tone dial ITU-T answer (Comma) Pause, See S8 sequence definition; which it’s U.S. answer tone linked to. Dials the specified phone (Semicolon) Return to number. Includes the Command mode after dialing. following: “...
  • Page 7 ECHNICAL UICK EFERENCE Dn (cont.) Local echo OFF. Receiving Dials, waits for quiet answer, system may send a remote and continues (X3 or higher). echo of data it receives. Displays a list of Dial Controls ON/OFF hook. commands. Hangs up (goes on hook). Sets local echo.
  • Page 8 ECHNICAL UICK EFERENCE Controls speaker volume Sets pulse dial (for phone (internals only). lines that don’t support Low volume touch-tone dialing). Low volume Displays/suppresses result Medium volume codes. High volume Displays result codes. Operates speaker. Quiet mode; no result Speaker always OFF. codes.
  • Page 9 ECHNICAL UICK EFERENCE Sr.b=n Sets bit .b of register r to n Displays a list of the S- (0/OFF or 1/ON). Registers. Sr=n Sets register r to n. Sets tone dial. Displays contents of Displays verbal/numeric S-Register r. result codes. Numeric codes Verbal codes...
  • Page 10 ECHNICAL UICK EFERENCE Sets result code displayed. Default is X4. Result Codes 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...
  • Page 11 ECHNICAL UICK EFERENCE Result Codes (cont.) 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...
  • Page 12 ECHNICAL UICK EFERENCE Resets modem to Selects power-on/reset NVRAM profile 0 default configuration. Resets modem to Use profile 0 setting NVRAM profile 1 in NVRAM Resets modem to Use profile 1 setting in factory default profile NVRAM 0 (&F0) Use factory Resets modem to configuration 0.

  • Page 13: Extended Data Commands

    ECHNICAL UICK EFERENCE &Cn Controls Carrier Detect (CD) Extended Data Commands signal. &$ Displays a list of ampersand (&) &C0 CD override commands. &C1 Normal CD operations &An Enables/disables additional result &Dn Controls Data Terminal Ready code subsets (see Xn). (DTR) operations.
  • Page 14 ECHNICAL UICK EFERENCE &I0 Software flow control &Gn Sets Guard Tone. disabled &G0 No guard tone, U.S. and &I1 XON/XOFF signals to your Canada modem and remote system &G1 550 Hz guard tone, some &I2 XON/XOFF signals to your European countries, requires modem only B0 setting.
  • Page 15 ECHNICAL UICK EFERENCE &N0 Connection speed is determined by &Mn Sets Error Control (ARQ) for the remote modem. connections at 1200 bps and higher. &N1 300 bps &M0 Normal mode, error control &N2 1200 bps disabled &N3 2400 bps &M1 Reserved &N4 4800 bps...
  • Page 16 ECHNICAL UICK EFERENCE &N20 32,000 bps &Pn Sets pulse (rotary) dial make/break &N21 33,333 bps ratio. &N22 34,666 bps &P0 U.S./Canada ratio, 39%/61% &N23 36,000 bps &P1 U.K. ratio, 33%/67% &N24 37,333 bps &Rn Sets Receive Data (RD) hardware &N25 38,666 bps flow control, Request to Send &N26 40,000 bps (RTS) (see also &Hn).
  • Page 17 ECHNICAL UICK EFERENCE the modem will hang up. When &Un is used in conjunction with &Tn Begins test modes. &Nn and &Nn is greater than 0, &T0 Ends testing &Nn is the ceiling connect speed. &T1 Analog Loopback &T2 Reserved $N=0 &N>0 &T3...
  • Page 18 ECHNICAL UICK EFERENCE &U20 32000 bps &U0 No restrictions on the minimum &U21 33,333 bps speed for the connection. &U22 34666 bps &U1 300 bps &U23 36000 bps &U2 1200 bps &U24 37,333 bps &U3 2400 bps &U25 38666 bps &U4 4800 bps &U26 40000 bps...
  • Page 19 ECHNICAL UICK EFERENCE &Wn Writes current configuration to &Zn? Displays the phone number stored at NVRAM templates. position n (n = 0 3). &W0 Modifies the NVRAM 0 &ZL? Displays the last executed dial string. template (Y0) &W1 Modifies the NVRAM 1 #CID=n Controls Caller ID feature.

  • Page 20: Dip Switches

    ECHNICAL UICK EFERENCE DIP Switches (External Modems with DIP Switches Only) 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 Data Terminal Ready (DTR) Override OFF Normal DTR operations: computer must provide DTR signal for the modem to accept commands;...
  • Page 21 ECHNICAL UICK EFERENCE Factory Switch Setting Function Carrier Detect (CD) Override OFF Modem sends CD signal when it connects with another modem, drops CD on disconnect ON CD always ON (Override) Power-on and ATZ Reset Software Defaults OFF Loads Y0-Y4 configuration from user-defined nonvolatile memory (NVRAM) ON Loads &F0 Generic template from read only memory (ROM) AT Command Set Recognition...

  • Page 22: S-Registers

    ECHNICAL UICK EFERENCE S-Registers To change a setting, use the ATSr=n command, where r is the register and n is a decimal value from 0 255 (unless otherwise indicated). Register Default Function Sets the number of rings on which to answer in Auto Answer mode. When set to 0, Auto Answer is disabled.
  • Page 23 ECHNICAL UICK EFERENCE Register Default Function Sets the number of seconds the modem waits before dialing. If Xn is set to X2 or X4, this is the time-out length if there isn' t a dial tone. Sets the number of seconds the modem waits for a carrier. May be set for much longer duration if, for example, the modem is originating an international connection.
  • Page 24 ECHNICAL UICK EFERENCE Register Default Function S10 (cont.) Note: If you set S10 = 255, the modem will not hang up when carrier is lost. Dropping DTR hangs up the modem. Sets the duration and spacing, in milliseconds, for tone dialing. Sets the duration, in fiftieths of a second, of the guard time for the escape code sequence (+++).
  • Page 25 ECHNICAL UICK EFERENCE Register Default Function S13 (cont.) Value Result At power on/reset, autodial the number stored in NVRAM at position 0. Reserved Disable quick retrains. Disconnect on escape code. The 1.5K-byte non-ARQ buffer allows data transfer with Xmodem- and Ymodem-type file transfer protocols without using flow control.
  • Page 26 ECHNICAL UICK EFERENCE Register Default Function S15 (cont.) Value Result Disable MNP handshake. Disable MNP level 4. Disable MNP level 3. MNP incompatibility. Disable V.42 operation. To disable V.42 detect phase, select the total of the values for bits 3 and 7 (in other words S15 = 136 [the sum of values 8 and 128]) Reserved Reserved...
  • Page 27 ECHNICAL UICK EFERENCE Register Default Function Sets the duration, in minutes, for the inactivity timer. The timer activates when there is no data activity on the phone line; at time-out the modem hangs up. S19 = 0 disables the timer. Reserved Sets the length, in 10-millisecond units, of breaks sent from the modem to the computer;...
  • Page 28 ECHNICAL UICK EFERENCE Register Default Function Bit-mapped register setup. To set the register, see instructions for S13. Value Result Enables ITU-T V.21 modulation at 300 bps for overseas calls; in V.21 mode, the modem answers both overseas and domestic (U.S. and Canada) calls, but only originates V.21 calls.
  • Page 29 ECHNICAL UICK EFERENCE Register Default Function Eliminates the V.32 answer tones for a faster connection. Default item, all times are in tenths of seconds. Disables all connections except V.32 at 9600 bps. Sets the duration, in tenths of a second, of the V.21 answer mode fallback timer. Reserved Reserved Bit-mapped register setup.
  • Page 30 ECHNICAL UICK EFERENCE Register Default Function Bit-mapped register setup. To set the register, see the instructions for S13. Value Result Disable 2400 symbol rate. Disable 2743 symbol rate. Disable 2800 symbol rate. Disable 3000 symbol rate. Disable 3200 symbol rate. Disable 3429 symbol rate.
  • Page 31 ECHNICAL UICK EFERENCE Register Default Function S34 (cont.) Value Result Disable TX level deviation. Disable Pre-emphasis. Disable Pre-coding. S35-S37 Reserved Sets an optional delay, in seconds, before a forced hang-up and clearing of the Transmit buffer when DTR drops during an ARQ call. This allows time for a remote modem to acknowledge receipt of all transmitted data before it is disconnected.
  • Page 32 ECHNICAL UICK EFERENCE Register Default Function S39-S40 Reserved Bit-mapped register setup. To set registers, see instructions for S13. Value Result Distinctive ring enabled. Speakerphone connect message override (voice products only). Reserved. Message waiting (voice products only). Reserved. Reserved. Reserved. Reserved. Reserved...

  • Page 33: Fax Commands

    ECHNICAL UICK EFERENCE Fax Commands +FCLASS=n Sets the mode of operation. FCLASS=0 Data mode FCLASS=1 Group 3 Facsimile Service Class 1 mode FCLASS? Displays the current FCLASS mode. (See mode descriptions above.) +FCLASS=? Displays the FCLASS mode options. (See mode descriptions above.) +FTS=n Stops the fax transmission.
  • Page 34 ECHNICAL UICK EFERENCE +FRS=n Makes the modem wait for a specified length of silence before sending OK to the screen. The pause is set in 10 millisecond intervals. n is the number of 10 millisecond intervals that pass before OK appears. (n=0-255) Note: This command terminates with OK when either the specified amount of silence is detected or when the user types anything (which is ignored).
  • Page 35 ECHNICAL UICK EFERENCE +FTH=n Transmits data framed in the HDLC protocol using the modulation specified by n. (n = 3, 24, 48, 72, 96, 97, 98, 121, 122, 145, or 146) Note: See the “Screen Messages” table at the end of this section for an explanation of messages that appear in response to this command.
  • Page 36 ECHNICAL UICK EFERENCE Screen Messages Displayed Displayed Description as a number in words The previous command has been processed successfully. CONNECT The modem has just connected to another modem. RING Reports the receipt of a network altering ring. NO CARRIER No carrier is being received from the modem.

  • Page 37: The Serial Interface (Cable Information)

    ECHNICAL UICK EFERENCE The Serial Interface The serial interface is a standard developed by the Electronic Industries Association (EIA). It defines the signals and voltages used when data is exchanged between a computer and a modem or serial printer. The entire standard covers many more functions than are used in most data communications applications.
  • Page 38 ECHNICAL UICK EFERENCE Serial Interface Pin Definitions Signal Source DB-25 DB-9 Circuit Function Computer/Modem — Chassis Ground Both Transmitted Data Computer Received Data Modem Request to Send Computer Clear to Send Modem Data Set Ready Modem Signal Ground Both Carrier Detect Modem —...