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APPENDIX A


                                APPENDIX A
                                ----------

              [part 19 from «The Winn Rosch HARDWARE  BIBLE»]
              [Brady, New York, 1988                        ]

         © Copyright  1991  by  Sergey Shulgin [SHS].  You can copy
         this document for non-commercial use without changes only.

         This document  was  printed  by  Sergey  Shulgin from Moscow
         Institute of Physics and Technology,  Laser Center  lab.  If
         you have  some  interest to this problem,  please call me by
         modem or voice.
               Coord:  Dolgoprudny,  Moscow region, Moscow Institute
                       of Physics and Technology, Institutsky per, 9
                       Laser Center lab.
               Phone:  (095) 408-79-88 from 10:00 till 19:00 by voice
                       (095) 408-79-88 from 19:00 till 08:00 by modem

          [connect to «Player's Dream» BBS and send message for me]
         +-----------------------------------------------------------+
         |        Welcome to «Player's Dream» BBS station!!!         |
         |     [1st BBS Station of United Group Games in Russia]     |
         |                                                           |
         |   Operating time: 19:00–08:00 Mon.-Sat.                   |
         |                   24h Sunday.                             |
         |                                                           |
         |   phone: (095) 408-79-88                                    |
         |                                                           |
         |   modem:up to 9600 with MNP protocol                      |
         |                                                           |
         |   SysOp: Yaroslav Levashov, Sergey Shulgin                |
         +-----------------------------------------------------------+



                        Hayes Extended Command Set
                        --------------------------
         +---------+------------------------------------------------+
         | Command |                    Function                    |
         +---------+------------------------------------------------+
         |         |                                                |
         |   AT    | Command line prefix. The ATtention command     |
         |         | precedes all other commans listed below except |
         |         | for A/ and the escape code. For example, the   |
         |         | command DT would be typed ATDT.                |
         +---------+------------------------------------------------+
         |   A/    | Repeat last command (not to be preceded by AT)  |
         +---------+------------------------------------------------+
         |    A    | The modem is set to answer mode and goes       |
         |         | offhook immediately. Answer without waiting    |
         |         | for ring.                                      |
         +---------+------------------------------------------------+
         |   Bn    | Bell mode — set 1200 bps protocol compatibility|
         |         | Selects V.22 or Bell 212A in the 1200bps mode. |
         |         | n=0, CCITT V.22 with 2100Hz Answer Back Tone.  |
         |         | n=1, Bell 212A with 2225Hz Answer Back Tone.   |
         +---------+------------------------------------------------+
         |   Cn    | Carrier state:  n=0, OFF                       |
         |         |                 n=1, ON                        |
         +---------+------------------------------------------------+
         |   Dn    | Dial telephone number. Dial the number immedi- |
         |         | ately following this command, where n is the   |
         |         | number combined with other dial subcommands as |
         |         | shown below. Any combination of the subcommands|
         |         | listed below may be strung together to perform |
         |         | the desired dialing sequence. The number is    |
         |         | dialed in the call progress or blind mode      |
         |         | depending on register S11.                     |
         |         |                                                |
         |         | DIAL                      FUNCTION             |
         |         | SUBCOMMAND                                     |
         |         |                                                |
         |         | T         — Touch Tone Dialing                 |
         |         | P         — Pulse dialing (some modems use by   |
         |         |             default to Pulse if T or P not used|
         |         | R         — Reverse mode. Puts modem in answer |
         |         |             mode immediately after dialing.    |
         |         |             Use answer frequencies when origi- |
         |         |             nating a call.                     |
         |         | S=n       — Dial a stored number. The numbers  |
         |         |             are stored in the registers of the |
         |         |             microcontroller.                   |
         |         |             n=0,1,2,3 — stored number that has |
         |         |                         been previously stored |
         |         |                         in non-volatile RAM,   |
         |         |                         using &Zn command.     |
         |         |                         (see &Zn command below)|
         |         |                                                |
         |         | W         — Wait (for seconds dial or access   |
         |         |             tone). Wait for a continuous tone  |
         |         |             before dialing the next number.    |
         |         |             Useful for dialing MCI or Sprint.  |
         |         |             The modem waits S7 seconds (see    |
         |         |             Appendix B about registers) for the|
         |         |             tone. If the tone is not heard,    |
         |         |             BUSY or NO DIALTONE result code is |
         |         |             issued.                            |
         |         | @         — Wait for a «quiet answer» — one or |
         |         |             more rings followed by 5 seconds of|
         |         |             silence — for the length of time   |
         |         |             defined by register S7. (see App.B)|
         |         |,         — (comma) — Pause (a delay in dialing|
         |         |             sequence). Pause the length of time|
         |         |             specified by S8 (default time = 2s)|
         |         |             Each comma equals the pause length |
         |         |             specified. You may use as many     |
         |         |             commas as you like.                |
         |         |!         — Flash (on-hook for ½ second). This|
         |         |             character can be used to go tempo- |
         |         |             rarily on-hook in order to get a   |
         |         |             new dialtone.                      |
         |         |;         — Return to command mode after dia-  |
         |         |             ling. This command can only be     |
         |         |             placed at the end of a dial command|
         |         |                                                |
         |         | 0-9       — Digits and characters that may be  |
         |         | #         + used in dialing. # * and ABCD may  |
         |         | *         + only be used when tone dialing.    |
         |         | ABCD      +                                    |
         +---------+------------------------------------------------+
         |   En    | Echo modem command. Determines whether the mo- |
         |         | dem echoes the data received in the command    |
         |         | mode back to the host.                         |
         |         | n=0, echo OFF (or NO)                         |
         |         | n=1, echo ON  (or YES)                        |
         +---------+------------------------------------------------+
         |   Fn    | Full or half duplex operation.                 |
         |         | n=0, half duplex                               |
         |         | n=1, full duplex                               |
         +---------+------------------------------------------------+
         |   Hn    | Hook. Controls the modem on/off hook relay     |
         |         | n=0, on hook (disconnected or hang up)          |
         |         | n=1, off hook                                  |
         +---------+------------------------------------------------+
         |   In    | Request product code and ROM checksum. Return  |
         |         | product ID/checksum.                           |
         |         | n=0, Returns product ID. Modem sends its       |
         |         |      3-digit product code.                     |
         |         | n=1, Performs checksum, return checksum. Requ- |
         |         |      est numeric checksum of firmware ROM.     |
         |         | n=2, Performs checksum, returns result code.   |
         |         |      Request OK or ERROR state of ROM checksum.|
         |         | n=3, returns ROM part # and revison level.     |
         +---------+------------------------------------------------+
         |   Ln    | Loudness of speaker volume                     |
         |         | n=0, low                                       |
         |         | n=1, low                                       |
         |         | n=2, medium                                    |
         |         | n=3, high                                      |
         +---------+------------------------------------------------+
         |   Mn    | Speaker control. Mode of speaker operation.    |
         |         | n=0, speaker always OFF                        |
         |         | n=1, speaker ON when phone is off-hook         |
         |         |      speaker OFF when Carrier Detected         |
         |         | n=2, speaker always ON                         |
         |         | n=3, speaker ON after dialing until Carrier    |
         |         |      Detected. Disable speaker when modem      |
         |         |      receives a carrier signal while modem is  |
         |         |      dialing.                                  |
         +---------+------------------------------------------------+
         |   On    | On-line state. Puts modem in the online data   |
         |         | mode.                                          |
         |         | n=0, Online. Modem returns to the on-line state|
         |         | n=1, Online with equalizer retrain sequence.   |
         |         |      Modem returns on-line and retrains equali-|
         |         |      zer. (2400 bps mode only)                 |
         +---------+------------------------------------------------+
         |   Qn    | Quiet command for result codes. Result codes   |
         |         | ON/OFF.                                        |
         |         | n=0, codes are sent                            |
         |         | n=1, codes are NOT sent                        |
         +---------+------------------------------------------------+
         |   Sn?   | Reads the contents of status register Sn.      |
         |         | Display value of S-register n.                 |
         +---------+------------------------------------------------+
         |  Sn=x   | S-register command. This command may be used to|
         |         | modify an S register of the modem. It assigns  |
         |         | a value X to the status register N. They may   |
         |         | be reset to the default values by issuing an   |
         |         | '&F' or 'Z' command. See Appendix B for a list |
         |         | of S registers.                                |
         |         | n=S-register number                            |
         |         | x=value to set register to                     |
         +---------+------------------------------------------------+
         |   Vn    | Sets result code format. Verbose mode for      |
         |         | result codes.                                  |
         |         | n=0, use digits (numeric)                       |
         |         | n=1, use words                                 |
         +---------+------------------------------------------------+
         |   Xn    | Sets dialing mode, result code format for dial |
         |         | command. Enable extended result code and mode  |
         |         | setting.                                       |
         |         | n=0, basic (300bps).Dialtone and busy signal    |
         |         |      not recognized (blind dialing). Result    |
         |         |      codes 0–4 enabled.                        |
         |         | n=1, extended (no dialtone or busy signal detec-|
         |         |      tion). Dialtone and busy signal not recog-|
         |         |      nized (blind dialing). Result codes 0-5   |
         |         |      and 100 enabled.                          |
         |         | n=2, extended (detects dialtone but not busy    |
         |         |      signals). Dialtone detected. Busy signal  |
         |         |      not detected. Result codes 0–6 and 10     |
         |         |      enabled.                                  |
         |         | n=3, extended (no dialtone detect but detects   |
         |         |      busies). Busy signal detected. Dialtone   |
         |         |      not detected. Result codes 0–5,7 and 10   |
         |         |      enabled.                                  |
         |         | n=4, extended (detects both dialtones and busies|
         +---------+------------------------------------------------+
         |   Yn    | Long Space Disconnect Option                   |
         |         | n=0, disabled                                  |
         |         | n=1, enabled; disconnects after receiving      |
         |         |      1.6 sec break.                            |
         +---------+------------------------------------------------+
         |    Z    | Causes a software reset with registers set to  |
         |         | default values. Fetch configuration profile    |
         |         | from non-volatile memory.                      |
         +---------+------------------------------------------------+



         +---------+------------------------------------------------+
         | Command |                    Function                    |
         +---------+------------------------------------------------+
         |   &Cn   | Data Carrier Detect handling. Enables DCD.     |
         |         | n=0, DCD always on. Modem keeps DCD  (RS-232    |
         |         |      pin 8) always on.                         |
         |         | n=1, DCD set by modem when remote carrier      |
         |         |      detected. DCD tracks data carrier detected|
         |         |      by modem.                                 |
         +---------+------------------------------------------------+
         |   &Dn   | Data Terminal Ready handling. Enables DTR.     |
         |         | DTR ON/OFF time as specified by S25.           |
         |         | n=0, modem ignores DTR line (RS-232 pin 20)    |
         |         | n=1, switches to command mode when DTR goes off|
         |         |      modem assumes asynch command state when   |
         |         |      DTR goes off.                             |
         |         | n=2, same as n=1. Also hangs up, disables auto |
         |         |      answer. DTR off switches modem off hook,  |
         |         |      out of answer mode and back to command    |
         |         |      state.                                    |
         |         | n=3, initializes modem when DTR goes off.      |
         |         |      DTR switching off initialized modem.      |
         +---------+------------------------------------------------+
         |    &F   | Fetch factory configuration profile from ROM.  |
         |         | Sets values for S Registers and Commands to    |
         |         | factory default. Same as powerup reset.        |
         +---------+------------------------------------------------+
         |   &Gn   | Guard tone selection (used only when in CCITT  |
         |         | modes)                                         |
         |         | n=0, no guard tones                            |
         |         | n=1, 550 Hz guard tone                         |
         |         | n=2, 1800 Hz guard tone                        |
         |         | This command need never be used when communica-|
         |         | ting over U.S. phone lines. Outside the U.S.   |
         |         | the modem may need to generate an additional   |
         |         | tone, along with its carrier, to disable echo  |
         |         | suppressors in the central office. The guard   |
         |         | tone varies by country.                        |
         +---------+------------------------------------------------+
         |   &Jn   | Telephone jack selection                       |
         |         | n=0, RJ-11/RJ-41S/RJ-45S                       |
         |         | n=1, RJ-12/RJ-13                               |
         +---------+------------------------------------------------+
         |   &Ln   | Leased-line or dialup line selection           |
         |         | n=0, dialup operation                          |
         |         | n=1, leased-line                               |
         +---------+------------------------------------------------+
         |   &Mn   | Asynchronous/Synchronous communication mode    |
         |         | selection                                      |
         |         | n=0, asynchronous                              |
         |         | n=1, synchronous mode 1 -async dialing, then   |
         |         |      switch to synchronous operation           |
         |         | n=2, synchronous mode 2 -stored number dialing |
         |         | n=3, synchronous mode 3 -manual dialing        |
         +---------+------------------------------------------------+
         |   &Pn   | Pulse dial make/break pulse length selection   |
         |         | n=0, 39% make, 61% break (US and Canada standard)|
         |         | n=1, 33% make, 67% break                        |
         +---------+------------------------------------------------+
         |   &Qn   | Communications Mode Option                     |
         |         |        Idle State           On-Line State      |
         |         |        ----------           -------------      |
         |         | n=0,   Normal               Asynchronous       |
         |         | n=1,   Normal               Reserved           |
         |         | n=2,   Dial when DTR=1      Reserved           |
         |         |        Hangup when DTR=0                       |
         |         | n=3,   Task/data, DTR=0/1   Reserved           |
         +---------+------------------------------------------------+
         |   &Rn   | Requiest to Send/Clear to Send handling        |
         |         | (sync mode only)                               |
         |         | n=0, CTS (RS-232 pin 5) tracks RTS (pin4)      |
         |         | n=1, modem ignores RTS and turns CTS on when   |
         |         |      ready to receive synchronous data         |
         +---------+------------------------------------------------+
         |   &Sn   | Data Set Ready handling. Controls DSR. DRS ON  |
         |         | indicates that the modem is connected to a     |
         |         | communication channel and is ready.            |
         |         | n=0, DSR is always ON. Modem forces DSR ON     |
         |         |      whenever modem is turned on               |
         |         | n=1, DSR (RS-232 pin 6) operates accong to EIA |
         |         |      specs. DSR turned ON at start of hand-    |
         |         |      shaking, off in test mode, idle state, or |
         |         |      when carrier is lost                      |
         +---------+------------------------------------------------+
         |   &Tn   | Control Test mode (not available in 300bps mode)|
         |         | n=0, terminate any test in progress when last  |
         |         |      command on a line. Ends current test and  |
         |         |      returns to command mode                   |
         |         | n=1, initiates local analog loopback test      |
         |         | n=3, initiate local digital loopback test      |
         |         | n=4, conditions modem to perform remote digital|
         |         |      loopback when requested by another modem  |
         |         | n=5, prohibits remote digital loopback         |
         |         | n=6, initiates remote digital loopback with    |
         |         |      another modem                             |
         |         | n=7, initiates remote digital loopback with    |
         |         |      self-test                                 |
         |         | n=8, initiates local analog loopback with      |
         |         |      self-test                                 |
         +---------+------------------------------------------------+
         |   &V    | Displays active configuration profiles (S Re-  |
         |         | gister settings, commands, and telephone       |
         |         | numbers. Inputs from DTE are ignored while     |
         |         | this information is being sent.                |
         +---------+------------------------------------------------+
         |   &Wn   | Write active configuration profile to memory.  |
         |         | Sends and stores acceptable values for certain |
         |         | commands and S Registers to non-volatile RAM.  |
         |         | The last DTE speed and parity are also stored  |
         |         | Stored values are used on power-up or hard     |
         |         | reset.                                         |
         |         | n=0, store active profile in location 0        |
         |         | n=1, store active profile in location 1        |
         +---------+------------------------------------------------+
         |   &Xn   | Select synchronous transmit clock source       |
         |         | (sync mode only)                               |
         |         | n=0, Internal clock, modem generates timing    |
         |         |      and sends through pin 15                  |
         |         | n=1, modem's host computer generates timing    |
         |         |      and sends it to modem on pin 24, which    |
         |         |      modem routes to pin 15.                   |
         |         | n=2, Receive clock, modem derives timing from  |
         |         |      incoming signal and supplies it to pin 15 |
         +---------+------------------------------------------------+
         |   &Yn   | Select Stored Profile on Power Up Option       |
         |         | n=0, Select profile 0 on power up or hard reset|
         |         | n=1, Select profile 1 on power up or hard reset|
         |         | See, the &Wn command for particular commands   |
         |         | and S Registers stored. The selected &Y command|
         |         | survives a power outage.                       |
         +---------+------------------------------------------------+
         |   &Zn   | Stores telephone number.                       |
         |         | n=string of digits compatible with Dial command|
         +---------+------------------------------------------------+


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