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928 lines
34 KiB
928 lines
34 KiB
13 years ago
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<appendix id="appendix-hayes-commands">
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<title>The Hayes Modem Command Set</title>
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<para>Here is a description of the Hayes Command Set. Most modems follow this
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command set to large extent. If you lost your modem manual or never had one in
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the first place, this reference might come in handy. I for instance finally found
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out how to turn my modems speaker off: <command>ATM0</command> -- Finally:
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Silence!</para>
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<para>The modem initialization string consists of a series of commands. It
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prepares the modem for communications, setting such features as dialing mode,
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waits, detection of the busy signal and many other settings. Newer modem
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communications programs reset the initializations string for you according to
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which menu options you select, which features you enable, &etc;.</para>
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<para>For many years Hayes modems have been the standard. As the field of modem
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manufactures has grown, most have adhered at least loosely to the Hayes
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standard. The following is a partial list of the Hayes command set. (called the
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<quote>AT</quote> commands). The Hayes Command Set can be divided into four
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groups:</para>
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<variablelist>
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<varlistentry>
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<term>Basic Command Set</term>
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<listitem><para>A capital character followed by a digit. For example,
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<command>M1</command>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>Extended Command Set</term>
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<listitem><para>An <quote>&</quote> (ampersand) and a capital character
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followed by a digit. This is an extension of the basic command set. For example,
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<command>&M1</command>. Note that <command>M1</command> is different from
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<command>&M1</command>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>Proprietary Command Set</term>
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<listitem><para>Usually started by either a backslash (<quote>\</quote>), or a
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percent sign (<quote>%</quote>), these commands vary widely among modem
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manufacturers. For that reason, only a few of these commands are listed
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below.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term>Register Commands</term>
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<listitem><para><command>S<replaceable>r</replaceable>=<replaceable>n</replaceable></command>
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where <replaceable>r</replaceable> is the number of the register to be changed,
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and <replaceable>n</replaceable> is the new value that is
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assigned.</para>
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<para>A <quote>register</quote> is computerese for a specific physical location
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in memory. Modems have small amounts of memory onboard. This fourth set of
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commands is used to enter values in a particular register (memory location). The
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register will be storing a particular <quote>variable</quote> (alpha-numeric
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information) which is utilized by the modem and communication software. For
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example, <command>S7=60</command> instructs your computer to <quote>Set register
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#7 to the value 60</quote>.</para></listitem>
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</varlistentry>
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</variablelist>
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<note><para>Although most commands are defined by a letter-number combination
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(<command>L0</command>, <command>L1</command> &etc;), the user of a zero is
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optional. In this example, <command>L0</command> is the same as a plain
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<command>L</command>. Keep this in mind when reading the table
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below!</para></note>
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<para>Here are some of the most important characters that may appear in the
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modem initialization string. These characters normally should not be
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changed.</para>
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<variablelist>
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<varlistentry>
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<term><command>AT</command></term>
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<listitem><para>Tells the modem that modem commands follow. This must begin
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each line of commands.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>Z</command></term>
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<listitem><para>Resets the modem to it's default state</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>,</command> (a comma)</term>
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<listitem><para>makes your software pause for a second. You can use more than
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one <command>,</command> in a row. For example, <command>,,,,</command> tells
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the software to pause four seconds. (The duration of the pause is governed by
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the setting of register <varname>S8</varname>.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>^M</command></term>
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<listitem><para>Sends the terminating Carriage Return character to the modem.
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This is a control code that most communication software translates as
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<quote>Carriage Return</quote></para></listitem></varlistentry>
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</variablelist>
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<sect1 id="hayes-basic-commands">
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<title>The Basic Hayes Command Set</title>
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<para>In alphabetical order:</para>
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<table>
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<title>Basic Hayes Command Set</title>
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<tgroup cols="3">
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<thead>
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<row>
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<entry>Command</entry>
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<entry>Description</entry>
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<entry>Comments</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry><command>A0</command> or <command>A</command></entry>
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<entry>Answer incoming call</entry>
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<entry></entry>
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</row>
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<row>
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<entry><command>A/</command></entry>
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<entry>Repeat last command</entry>
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<entry>Don't preface with <command>AT</command>. Enter usually
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aborts.</entry>
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</row>
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<row>
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<entry><command>B0</command> or <command>B</command></entry>
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<entry>Call negotiation</entry>
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<entry>V32 Mode/CCITT Answer Seq.</entry>
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</row>
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<row>
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<entry><command>B1</command></entry>
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<entry>Call negotiation</entry>
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<entry>Bell 212A Answer Seq.</entry>
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</row>
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<row>
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<entry><command>B2</command></entry>
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<entry>Call negotiation</entry>
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<entry>Verbose/Quiet On Answer</entry>
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</row>
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<row>
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<entry><command>D</command></entry>
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<entry>Dial</entry>
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<entry><para>Dial the following number and then handshake in originate
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mode.</para><variablelist>
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<varlistentry>
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<term><command>P</command></term>
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<listitem><para>Pulse Dial</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>T</command></term>
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<listitem><para>Touch Tone Dial</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>W</command></term>
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<listitem><para>Wait for the second dial tone</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>,</command></term>
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<listitem><para>Pause for the time specified in register
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<varname>S8</varname> (usually 2 seconds</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>;</command></term>
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<listitem><para>Remain in command mode after dialing.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>!</command></term>
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<listitem><para>Flash switch-hook (Hang up for a half second, as in
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transferring a call.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><command>L</command></term>
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<listitem><para>Dial last number</para></listitem>
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</varlistentry>
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</variablelist></entry>
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</row>
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<row>
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<entry><command>E0</command> or <command>E</command></entry>
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<entry>No Echo</entry>
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<entry>Will not echo commands to the computer</entry>
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</row>
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<row>
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<entry><command>E1</command></entry>
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<entry>Echo</entry>
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<entry>Will echo commands to the computer (so one can see what one
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types)</entry>
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</row>
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<row>
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<entry><command>H0</command></entry>
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<entry>Hook Status</entry>
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<entry>On hook - Hang up</entry>
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</row>
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<row>
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<entry><command>H1</command></entry>
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<entry>Hook status</entry>
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<entry>Off hook - phone picked up</entry>
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</row>
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<row>
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<entry><command>I0</command> or <command>I</command></entry>
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<entry>Inquiry, Information, or Interrogation</entry>
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<entry>This command is very model specific. <command>I0</command>
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usually returns a number or code, while higher numbers often provide much
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more useful information.</entry>
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</row>
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<row>
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<entry><command>L0</command> or <command>L</command></entry>
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<entry>Speaker Loudness. Modems with volume control knobs will not have
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these options.</entry>
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<entry>Off or low volume</entry>
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</row>
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<row>
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<entry><command>L1</command></entry>
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<entry></entry>
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<entry>Low Volume</entry>
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</row>
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<row>
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<entry><command>L2</command></entry>
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<entry></entry>
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<entry>Medium Volume</entry>
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</row>
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<row>
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<entry><command>L3</command></entry>
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<entry></entry>
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<entry>Loud or High Volume</entry>
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</row>
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<row>
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<entry><command>M0</command> or <command>M</command></entry>
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<entry>Speaker off</entry>
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<entry><command>M3</command> is also common, but different on many
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brands</entry>
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</row>
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<row>
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<entry><command>M1</command></entry>
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<entry></entry>
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<entry>Speaker on until remote carrier detected (&ie; until the other
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modem is heard)</entry>
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</row>
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<row>
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<entry><command>M2</command></entry>
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<entry></entry>
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<entry>Speaker is always on (data sounds are heard after CONNECT)</entry>
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</row>
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<row>
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<entry><command>N0</command> or <command>N</command></entry>
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<entry>Handshake Speed</entry>
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<entry>Handshake only at speed in <link linkend="hayes-s37"><varname>S37</varname></link></entry>
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</row>
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<row>
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<entry><command>N1</command></entry>
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<entry></entry>
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<entry>Handshake at highest speed larger than <link linkend="hayes-s37"><varname>S37</varname></link></entry>
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</row>
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<row>
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<entry><command>O0</command> or <command>O</command></entry>
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<entry>Return Online</entry>
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<entry>See also <link linkend="hayes-basic-x1"><command>X1</command></link> as dial tone
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detection may be active.</entry>
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</row>
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<row>
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<entry><command>O1</command></entry>
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<entry></entry>
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<entry>Return Online after an equalizer retrain sequence</entry>
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</row>
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<row>
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<entry><command>Q0</command> or <command>Q1</command></entry>
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<entry>Quiet Mode</entry>
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<entry>Off - Displays result codes, user sees command responses (⪚
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<computeroutput>OK</computeroutput>)</entry>
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</row>
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<row>
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<entry><command>Q1</command></entry>
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<entry>Quiet Mode</entry>
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<entry>On - Result codes are suppressed, user does not see
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responses.</entry>
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</row>
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<row>
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<entry><command>S<replaceable>n</replaceable>?</command></entry>
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<entry></entry>
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||
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<entry>Query the contents of S-register
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<replaceable>n</replaceable></entry>
|
||
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</row>
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||
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<row>
|
||
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<entry><command>S<replaceable>n</replaceable>=<replaceable>r</replaceable></command></entry>
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<entry>Store</entry>
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<entry>Store the value of <replaceable>r</replaceable> in S-register
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<replaceable>n</replaceable></entry>
|
||
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</row>
|
||
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<row>
|
||
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<entry><command>V0</command> or <command>V</command></entry>
|
||
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<entry>Verbose</entry>
|
||
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<entry>Numeric result codes</entry>
|
||
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</row>
|
||
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<row>
|
||
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<entry><command>V1</command></entry>
|
||
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<entry></entry>
|
||
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<entry>English result codes (⪚
|
||
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<computeroutput>CONNECT</computeroutput>,
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<computeroutput>BUSY</computeroutput>, <computeroutput>NO
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|
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CARRIER</computeroutput> &etc;)</entry>
|
||
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</row>
|
||
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<row>
|
||
|
|
<entry><command>X0</command> or <command>X</command></entry>
|
||
|
|
<entry>Smartmodem</entry>
|
||
|
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<entry>Hayes Smartmodem 300 compatible result codes</entry>
|
||
|
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</row>
|
||
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<row>
|
||
|
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<entry><anchor id="hayes-basic-x1"/><command>X1</command></entry>
|
||
|
|
<entry></entry>
|
||
|
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<entry>Usually adds connection speed to basic result codes (⪚
|
||
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<computeroutput>CONNECT 1200</computeroutput></entry>
|
||
|
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</row>
|
||
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<row>
|
||
|
|
<entry><command>X2</command></entry>
|
||
|
|
<entry></entry>
|
||
|
|
<entry>Usually adds dial tone detection (preventing blind dial, and
|
||
|
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sometimes preventing <command>AT0</command>)</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>X3</command></entry>
|
||
|
|
<entry></entry>
|
||
|
|
<entry>Usually adds busy signal detection</entry>
|
||
|
|
</row>
|
||
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|
<row>
|
||
|
|
<entry><command>X4</command></entry>
|
||
|
|
<entry></entry>
|
||
|
|
<entry>Usually adds both busy signal and dial tone detection</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>Z0</command> or <command>Z</command></entry>
|
||
|
|
<entry>Reset</entry>
|
||
|
|
<entry>Reset modem to stored configuration. Use <command>Z0</command>,
|
||
|
|
<command>Z1</command> &etc; for multiple profiles. This is the same as
|
||
|
|
<command>&F</command> for factory default on modems without
|
||
|
|
<acronym>NVRAM</acronym> (non voltaile memory)</entry>
|
||
|
|
</row>
|
||
|
|
</tbody>
|
||
|
|
</tgroup>
|
||
|
|
</table>
|
||
|
|
</sect1>
|
||
|
|
|
||
|
|
<sect1 id="hayes-extended-commands">
|
||
|
|
<title>The Extended Hayes Command Set</title><subtitle>Ampersand Commands</subtitle>
|
||
|
|
|
||
|
|
<table>
|
||
|
|
<title>The Extended Hayes Command Set</title>
|
||
|
|
<tgroup cols="3">
|
||
|
|
<thead>
|
||
|
|
<row>
|
||
|
|
<entry>Command</entry>
|
||
|
|
<entry>Description</entry>
|
||
|
|
<entry>Comments</entry>
|
||
|
|
</row>
|
||
|
|
</thead>
|
||
|
|
<tbody>
|
||
|
|
<row>
|
||
|
|
<entry><command>&B0</command> or <command>&B</command></entry>
|
||
|
|
<entry>Retrain Parameters</entry>
|
||
|
|
<entry>Disable auto retrain function</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&B1</command></entry>
|
||
|
|
<entry>Retrain Parameters</entry>
|
||
|
|
<entry>Enable auto retrain function</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&B2</command></entry>
|
||
|
|
<entry>Retrain Parameters</entry>
|
||
|
|
<entry>Enable auto retrain, but disconnect if no line improvement over
|
||
|
|
the period dictated by <link
|
||
|
|
linkend="hayes-s7"><varname>S7</varname></link></entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&C0</command> or <command>&C1</command></entry>
|
||
|
|
<entry>Carrier detect</entry>
|
||
|
|
<entry>Signal always on</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&C1</command></entry>
|
||
|
|
<entry>Carrier detect</entry>
|
||
|
|
<entry>Indicates remote carrier (usual preferred default)</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&D0</command> or <command>&D</command></entry>
|
||
|
|
<entry>Data Terminal Ready (<acronym>DTR</acronym></entry>
|
||
|
|
<entry>Signal ignored (This is modem specific, you must see your manual
|
||
|
|
for information on this one!)</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&D1</command></entry>
|
||
|
|
<entry>Data Terminal Ready (<acronym>DTR</acronym></entry>
|
||
|
|
<entry>If <acronym>DTR</acronym> goes from On to Off the modem goes into
|
||
|
|
command mode (Some modems only)</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&D2</command></entry>
|
||
|
|
<entry>Data Terminal Ready (<acronym>DTR</acronym></entry>
|
||
|
|
<entry>Some modems hang up on <acronym>DTR</acronym> On to Off transition
|
||
|
|
(This is the usual preferred default)</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&D3</command></entry>
|
||
|
|
<entry>Data Terminal Ready (<acronym>DTR</acronym></entry>
|
||
|
|
<entry>Hang up, reset the modem, and return to command mode upon
|
||
|
|
<acronym>DTR</acronym></entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&F0</command> or <command>&F</command></entry>
|
||
|
|
<entry>Factory defaults</entry>
|
||
|
|
<entry><para>Generic Hayes-compatible defaults. </para><para>This is
|
||
|
|
usually a good thing to use in your init string, since the
|
||
|
|
<command>&F1</command>-<command>&F3</command> settings can vary
|
||
|
|
among modems, and they may actually be the cause of connection
|
||
|
|
problems. (Since you never know exactly what Brand X's
|
||
|
|
<command>&F2</command> really changes.</para><para>On the other hand,
|
||
|
|
it pays to try out the other options below; many people's problems can be
|
||
|
|
solved by replacing a complicated init string with a simple
|
||
|
|
<command>&F2</command> or the like. However, if you're building an
|
||
|
|
init string, it's best to start with a simple <command>&F</command>,
|
||
|
|
and not use the <quote>customized</quote> form of
|
||
|
|
defaults.</para></entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&F1</command></entry>
|
||
|
|
<entry>Factory Defaults</entry>
|
||
|
|
<entry>Factory Defaults tailored to an IBM <acronym>PC</acronym>
|
||
|
|
compatible user</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&F2</command></entry>
|
||
|
|
<entry>Factory Defaults</entry>
|
||
|
|
<entry>Factory defaults for a Mac w/software handshaking</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&F3</command></entry>
|
||
|
|
<entry>Factory Defaults</entry>
|
||
|
|
<entry>Factory defaults for a Mac w/hardware handshaking</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&G0</command> or <command>&G</command></entry>
|
||
|
|
<entry>Guard tones</entry>
|
||
|
|
<entry>Disable guard tones</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&K0</command> or <command>&K</command></entry>
|
||
|
|
<entry>Local flow control</entry>
|
||
|
|
<entry>Disable local flow control</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&K1</command></entry>
|
||
|
|
<entry>Local flow control</entry>
|
||
|
|
<entry>Enable RTS/CTS hardware local flow control</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&K2</command></entry>
|
||
|
|
<entry>Local flow control</entry>
|
||
|
|
<entry>Enable XON/XOFF software local flow control</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&K3</command></entry>
|
||
|
|
<entry>Local flow control</entry>
|
||
|
|
<entry>Enable RTS/CTS hardware local flow control</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&K4</command></entry>
|
||
|
|
<entry>Local flow control</entry>
|
||
|
|
<entry>Enable XON/XOFF software local flow control</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&L0</command> or <command>&L</command></entry>
|
||
|
|
<entry>Dial mode</entry>
|
||
|
|
<entry>Select dial-up mode</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&M0</command> or <command>&M</command></entry>
|
||
|
|
<entry>Error control mode</entry>
|
||
|
|
<entry>Select asynchronous non-<acronym>EC</acronym> mode (the same as
|
||
|
|
<command>&Q0</command>)</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&P0</command> or <command>&P</command></entry>
|
||
|
|
<entry>Pulse dialing ratio</entry>
|
||
|
|
<entry>U.S./Canada pulse dialing 39% make / 61% break ratio</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&P1</command></entry>
|
||
|
|
<entry>Pulse dialing ratio</entry>
|
||
|
|
<entry>U.K./Hong Kong pulse dialing 33% make / 67% break ratio</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&Q0</command> or <command>&Q</command></entry>
|
||
|
|
<entry>Error control mode</entry>
|
||
|
|
<entry>Asynchronous non-<acronym>EC</acronym> more. No data
|
||
|
|
buffering. <acronym>ASB</acronym> disabled.</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&Q5</command></entry>
|
||
|
|
<entry>Error control mode</entry>
|
||
|
|
<entry>Select V.42 <acronym>EC</acronym> operation (requires flow
|
||
|
|
control)</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&Q6</command></entry>
|
||
|
|
<entry>Error control mode</entry>
|
||
|
|
<entry>Asynchronous mode with <acronym>ASB</acronym> (requires flow
|
||
|
|
control)</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&Q8</command></entry>
|
||
|
|
<entry>Error control mode</entry>
|
||
|
|
<entry>Select alternate <acronym>EC</acronym> protocol
|
||
|
|
(<acronym>MNP</acronym>)</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&Q9</command></entry>
|
||
|
|
<entry>Error control mode</entry>
|
||
|
|
<entry>Conditional data compression: V.42bis = yes, MNP5 = no.</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&S0</command> or <command>&S</command></entry>
|
||
|
|
<entry><acronym>DSR</acronym> action select</entry>
|
||
|
|
<entry>Always on (default)</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&S1</command></entry>
|
||
|
|
<entry><acronym>DSR</acronym> action select</entry>
|
||
|
|
<entry>Follows <acronym>EIA</acronym> specification (Active following
|
||
|
|
carrier tone, and until carrier is lost.)</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&T0</command> or <command>&T</command></entry>
|
||
|
|
<entry>Self test</entry>
|
||
|
|
<entry>Model specific self test on some modems</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&U0</command> or <command>&U</command></entry>
|
||
|
|
<entry>Trellis code modulation</entry>
|
||
|
|
<entry>Enable V.32 <acronym>TCM</acronym></entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&U1</command></entry>
|
||
|
|
<entry>Trellis code modulation</entry>
|
||
|
|
<entry>Disable V.32 <acronym>TCM</acronym></entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&V0</command> or <command>&V1</command></entry>
|
||
|
|
<entry>View active</entry>
|
||
|
|
<entry>(and often stored) configuration profile settings (or
|
||
|
|
<command>ATI4</command></entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&W0</command> or <command>&W</command></entry>
|
||
|
|
<entry>Store profile</entry>
|
||
|
|
<entry>In <acronym>NVRAM</acronym> (<command>&W0</command>,
|
||
|
|
<command>&W1</command> etc. for multiple profiles) Some settings
|
||
|
|
cannot be stored. These often don't show on <command>&V</command> or
|
||
|
|
<command>ATI4</command></entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&Y0</command> or <command>&Y</command></entry>
|
||
|
|
<entry>Select configuration loaded at power-up</entry>
|
||
|
|
<entry>Load profile 0 (default)</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&Y1</command></entry>
|
||
|
|
<entry>Select configuration loaded at power-up</entry>
|
||
|
|
<entry>Load profile 1</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>&Z<replaceable>n</replaceable>=<replaceable>x</replaceable></command></entry>
|
||
|
|
<entry>Soft reset and load stored profile number
|
||
|
|
<replaceable>n</replaceable></entry>
|
||
|
|
<entry>Note that all items after the <command>&Z</command> on the
|
||
|
|
command line are ignored</entry>
|
||
|
|
</row>
|
||
|
|
</tbody>
|
||
|
|
</tgroup>
|
||
|
|
</table>
|
||
|
|
|
||
|
|
</sect1>
|
||
|
|
|
||
|
|
<sect1 id="hayes-backslash-commands">
|
||
|
|
<title>Backslash and Percent Commands</title>
|
||
|
|
|
||
|
|
<table>
|
||
|
|
<title>Backslash and Percent Commands</title>
|
||
|
|
<tgroup cols="3">
|
||
|
|
<thead>
|
||
|
|
<row>
|
||
|
|
<entry>Command</entry>
|
||
|
|
<entry>Description</entry>
|
||
|
|
<entry>Comments</entry>
|
||
|
|
</row>
|
||
|
|
</thead>
|
||
|
|
<tbody>
|
||
|
|
<row>
|
||
|
|
<entry><command>\A0</command> or <command>\A</command></entry>
|
||
|
|
<entry>Character maximum <acronym>MNP</acronym> block size</entry>
|
||
|
|
<entry>64 character maximum</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>\A1</command></entry>
|
||
|
|
<entry>Character maximum <acronym>MNP</acronym> block size</entry>
|
||
|
|
<entry>128 character maximum</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>\A2</command></entry>
|
||
|
|
<entry>Character maximum <acronym>MNP</acronym> block size</entry>
|
||
|
|
<entry>192 character maximum</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>\A3</command></entry>
|
||
|
|
<entry>Character maximum <acronym>MNP</acronym> block size</entry>
|
||
|
|
<entry>256 character maximum</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>%C0</command> or
|
||
|
|
<command>%C</command></entry>
|
||
|
|
<entry>Data Compression Enable/Disable</entry>
|
||
|
|
<entry>Disabled</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>%C1</command></entry>
|
||
|
|
<entry>Data Compression Enable/Disable</entry>
|
||
|
|
<entry>MNP5 enabled</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>%C2</command></entry>
|
||
|
|
<entry>Data Compression Enable/Disable</entry>
|
||
|
|
<entry>V.42bis (<acronym>BTLZ</acronym>) Enabled</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>%C3</command></entry>
|
||
|
|
<entry>Data Compression Enable/Disable</entry>
|
||
|
|
<entry>MNP5 & V.42bis (<acronym>BTLZ</acronym>) Enabled</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>%D0</command> or
|
||
|
|
<command>%D</command></entry>
|
||
|
|
<entry>Data compression</entry>
|
||
|
|
<entry>512 BLTZ dictionary size</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>%D1</command></entry>
|
||
|
|
<entry>Data compression</entry>
|
||
|
|
<entry>1024 BLTZ dictionary size</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>%D2</command></entry>
|
||
|
|
<entry>Data compression</entry>
|
||
|
|
<entry>2048 BLTZ dictionary size</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>%D3</command></entry>
|
||
|
|
<entry>Data compression</entry>
|
||
|
|
<entry>4096 BLTZ dictionary size</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>%E0</command> or
|
||
|
|
<command>%E1</command></entry>
|
||
|
|
<entry>Escape method</entry>
|
||
|
|
<entry>ESCAPE DISABLED</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>%E1</command></entry>
|
||
|
|
<entry>Escape method</entry>
|
||
|
|
<entry><command>+++AT</command> method (default)</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>%E2</command></entry>
|
||
|
|
<entry>Escape method</entry>
|
||
|
|
<entry><computeroutput>Break</computeroutput> <command>AT</command>
|
||
|
|
method</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>%E3</command></entry>
|
||
|
|
<entry>Escape method</entry>
|
||
|
|
<entry>BOTH methods enabled</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>%E4</command></entry>
|
||
|
|
<entry>Escape method</entry>
|
||
|
|
<entry>Disable <computeroutput>OK</computeroutput> to
|
||
|
|
<command>+++</command></entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>%E5</command></entry>
|
||
|
|
<entry>Escape method</entry>
|
||
|
|
<entry>Enable <computeroutput>OK</computeroutput> to
|
||
|
|
<command>+++</command></entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>\J0</command> or <command>\J</command></entry>
|
||
|
|
<entry><acronym>DTE</acronym> Auto Rate Adjustment</entry>
|
||
|
|
<entry>Disabled</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>\J1</command></entry>
|
||
|
|
<entry><acronym>DTE</acronym> Auto Rate Adjustment</entry>
|
||
|
|
<entry><acronym>DTE</acronym> rate is adjusted to match carrier rate.</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>\N0</command> or <command>\N</command></entry>
|
||
|
|
<entry>Connection type</entry>
|
||
|
|
<entry>Normal connection (see below for definitions)</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>\N1</command></entry>
|
||
|
|
<entry>Connection type</entry>
|
||
|
|
<entry>Direction connection</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>\N2</command></entry>
|
||
|
|
<entry>Connection type</entry>
|
||
|
|
<entry><acronym>MNP</acronym> Auto-reliable connection</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>\N3</command></entry>
|
||
|
|
<entry>Connection type</entry>
|
||
|
|
<entry>Auto-reliable connection</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>\N4</command></entry>
|
||
|
|
<entry>Connection type</entry>
|
||
|
|
<entry>V.42bis reliable link with phase detection</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>\N5</command></entry>
|
||
|
|
<entry>Connection type</entry>
|
||
|
|
<entry>V.42bis auto-reliable link with phase detection</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>\N6</command></entry>
|
||
|
|
<entry>Connection type</entry>
|
||
|
|
<entry>V.42 reliable link with phase detection</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><command>\N7</command></entry>
|
||
|
|
<entry>Connection type</entry>
|
||
|
|
<entry>V.42 auto-reliable link with phase detection</entry>
|
||
|
|
</row>
|
||
|
|
</tbody>
|
||
|
|
</tgroup>
|
||
|
|
</table>
|
||
|
|
|
||
|
|
<para>A direct connection is a simple straight-through connection without any
|
||
|
|
error connection or data compression. In this case, the computer-to-modem and
|
||
|
|
modem-to-modem speeds must be identical.</para>
|
||
|
|
|
||
|
|
<para>A normal connection uses flow control (either software or hardware) to
|
||
|
|
buffer the data being sent or received, so that the modem can transmit data at a
|
||
|
|
different rate than the computer is actually sending or receiving it. For
|
||
|
|
example, a computer may send actual data at 57kbps, but using compression, the
|
||
|
|
modem only actually sends 28.8kbps. This is the mode use by most modems.</para>
|
||
|
|
|
||
|
|
<para>A reliable connection is a type of normal connection; if, for some reason,
|
||
|
|
data compression or error correction cannot be established or maintained, the
|
||
|
|
connection will hang up. (In essence, such a modem ensures that all connections
|
||
|
|
are reliable, for it will hang up if the connection isn't.)</para>
|
||
|
|
|
||
|
|
<para>Likewise, an auto-reliable connection is virtually the same, except that
|
||
|
|
the modem will try to renegotiate the connection in order to establish a
|
||
|
|
reliable connection. Again, this is the mode that most modems use.</para>
|
||
|
|
|
||
|
|
</sect1>
|
||
|
|
|
||
|
|
<sect1 id="hayes-sregisters">
|
||
|
|
<title>S-Registers</title>
|
||
|
|
|
||
|
|
<table>
|
||
|
|
<title>S Registers</title>
|
||
|
|
<tgroup cols="4">
|
||
|
|
<thead>
|
||
|
|
<row>
|
||
|
|
<entry>Register</entry>
|
||
|
|
<entry>Range</entry>
|
||
|
|
<entry>Default</entry>
|
||
|
|
<entry>Function</entry>
|
||
|
|
</row>
|
||
|
|
</thead>
|
||
|
|
<tbody>
|
||
|
|
<row>
|
||
|
|
<entry><varname>S0</varname></entry>
|
||
|
|
<entry>0-255 rings</entry>
|
||
|
|
<entry>1-2</entry>
|
||
|
|
<entry>Answer on ring number. Don't answer if 0</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><varname>S1</varname></entry>
|
||
|
|
<entry>0-255 rings</entry>
|
||
|
|
<entry>0</entry>
|
||
|
|
<entry>if <varname>S0</varname> is greater than
|
||
|
|
<returnvalue>0</returnvalue> this register counts the incoming
|
||
|
|
rings.</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><varname>S2</varname></entry>
|
||
|
|
<entry>0-127 <acronym>ASCII</acronym></entry>
|
||
|
|
<entry>43 +</entry>
|
||
|
|
<entry>Escape to command mode character</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><varname>S2</varname></entry>
|
||
|
|
<entry>>127</entry>
|
||
|
|
<entry></entry>
|
||
|
|
<entry>no ESC</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><varname>S3</varname></entry>
|
||
|
|
<entry>0-127 <acronym>ASCII</acronym></entry>
|
||
|
|
<entry>13 CR</entry>
|
||
|
|
<entry>Carriage return character</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><varname>S4</varname></entry>
|
||
|
|
<entry>0-127 <acronym>ASCII</acronym></entry>
|
||
|
|
<entry>10 LF</entry>
|
||
|
|
<entry>Line feed character</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><varname>S5</varname></entry>
|
||
|
|
<entry>0-32, 127 <acronym>ASCII</acronym></entry>
|
||
|
|
<entry>8 BS</entry>
|
||
|
|
<entry>Backspace character</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><varname>S6</varname></entry>
|
||
|
|
<entry>2-255 seconds</entry>
|
||
|
|
<entry>2</entry>
|
||
|
|
<entry>Dial tone wait time (blind dialing, see <link
|
||
|
|
linkend="hayes-basic-x1">X<replaceable>n</replaceable></link></entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><anchor id="hayes-s7"/><varname>S7</varname></entry>
|
||
|
|
<entry>1-255 seconds</entry>
|
||
|
|
<entry>30-60</entry>
|
||
|
|
<entry>Wait time for remote carrier</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><varname>S8</varname></entry>
|
||
|
|
<entry>0-255 seconds</entry>
|
||
|
|
<entry>2</entry>
|
||
|
|
<entry>Comma pause time used in dialing</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><varname>S9</varname></entry>
|
||
|
|
<entry>1-255 1/10ths second</entry>
|
||
|
|
<entry>6</entry>
|
||
|
|
<entry>Carrier detect time required for recognition</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><varname>S10</varname></entry>
|
||
|
|
<entry>1-255 1/10ths second</entry>
|
||
|
|
<entry>7-14</entry>
|
||
|
|
<entry>Time between loss of carrier and hangup</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><varname>S11</varname></entry>
|
||
|
|
<entry>50-255 milliseconds</entry>
|
||
|
|
<entry>70-95</entry>
|
||
|
|
<entry>Duration and spacing of tones when tone dialing</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><varname>S12</varname></entry>
|
||
|
|
<entry>0-255 1/50th seconds</entry>
|
||
|
|
<entry>50</entry>
|
||
|
|
<entry>Guard time for pause around <command>+++</command> command
|
||
|
|
sequence</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><varname>S36</varname></entry>
|
||
|
|
<entry><para>Fallback options when error correction link
|
||
|
|
fails:</para><itemizedlist>
|
||
|
|
<listitem><para>0 - Disconnect</para>
|
||
|
|
</listitem>
|
||
|
|
<listitem><para>1 - Establish Direct Connection</para>
|
||
|
|
</listitem>
|
||
|
|
<listitem><para>3 - Establish Normal Connection</para>
|
||
|
|
</listitem>
|
||
|
|
<listitem><para>4 - Establish an <acronym>MNP</acronym> connection if
|
||
|
|
possible, else disconnect</para>
|
||
|
|
</listitem>
|
||
|
|
<listitem><para>5 - Establish an <acronym>MNP</acronym> connection if
|
||
|
|
possible, else Direct Connection.</para>
|
||
|
|
</listitem>
|
||
|
|
<listitem><para>7 - Establish an <acronym>MNP</acronym> connection if
|
||
|
|
possible, else Normal connection</para>
|
||
|
|
</listitem>
|
||
|
|
</itemizedlist></entry>
|
||
|
|
<entry>7</entry>
|
||
|
|
<entry>Negotiation Failure Treatment</entry>
|
||
|
|
</row>
|
||
|
|
<row>
|
||
|
|
<entry><anchor id="hayes-s37"/><varname>S37</varname></entry>
|
||
|
|
<entry><itemizedlist>
|
||
|
|
<listitem><para><returnvalue>1</returnvalue> = 300 bps</para>
|
||
|
|
</listitem>
|
||
|
|
<listitem><para><returnvalue>5</returnvalue> = 1200 bps</para>
|
||
|
|
</listitem>
|
||
|
|
<listitem><para><returnvalue>6</returnvalue> = 2400 bps</para>
|
||
|
|
</listitem>
|
||
|
|
<listitem><para><returnvalue>7</returnvalue> = 1200/75 bps (v.23
|
||
|
|
mode)</para>
|
||
|
|
</listitem>
|
||
|
|
<listitem><para><returnvalue>8</returnvalue> = 4800 bps</para>
|
||
|
|
</listitem>
|
||
|
|
<listitem><para><returnvalue>9</returnvalue> = 9600 bps</para>
|
||
|
|
</listitem>
|
||
|
|
<listitem><para><returnvalue>10</returnvalue> = 12000 bps</para>
|
||
|
|
</listitem>
|
||
|
|
<listitem><para><returnvalue>11</returnvalue> = 14400 bps</para>
|
||
|
|
</listitem>
|
||
|
|
<listitem><para><returnvalue>12</returnvalue> = 7200 bps</para>
|
||
|
|
</listitem>
|
||
|
|
</itemizedlist></entry>
|
||
|
|
<entry>0</entry>
|
||
|
|
<entry>Negotiation Speed (Initial handshake)</entry>
|
||
|
|
</row>
|
||
|
|
</tbody>
|
||
|
|
</tgroup>
|
||
|
|
</table>
|
||
|
|
|
||
|
|
<para>Many modems have dozens, even hundreds, of S registers, but only the first
|
||
|
|
dozen or so are fairly standard. They are changed with a command like
|
||
|
|
<command>ATS<replaceable>n</replaceable>=<replaceable>N</replaceable></command>,
|
||
|
|
and examined with <command>ATS<replaceable>n</replaceable>?</command> (⪚
|
||
|
|
<userinput><command>AT</command> <command>S10</command><option>=70</option>
|
||
|
|
<command>S1?</command></userinput> would tell the modem not to hang up for seven
|
||
|
|
seconds should it not hear the answering modem, and return the number of times
|
||
|
|
the phone last rang.)</para>
|
||
|
|
|
||
|
|
</sect1>
|
||
|
|
</appendix>
|