178 lines
8.1 KiB
Plaintext
178 lines
8.1 KiB
Plaintext
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File MODEMS.DOC July 1993
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MS-DOS KERMIT MODEM DIALING SCRIPTS
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Christine M. Gianone, Frank da Cruz
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Columbia University
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John Klensin
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United Nations University
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The following modem dialing scripts are available for use with the DIAL
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command in MS-DOS Kermit 3.12 and later. Store the desired files in the same
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directory as your MSKERMIT.INI file.
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The DIAL command is a macro defined in the standard MSKERMIT.INI file on the
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MS-DOS Kermit diskette. It looks up the number (or name) in your dialing
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directory, making the appropriate substitution, and passes the phone number to
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your dialing script in a variable. See "Using MS-DOS Kermit" and KERMIT.HLP
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(MSKERM.HLP) for details about the DIAL command and the dialing directory.
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If you lack the DIAL macro definition, you can define your own simple DIAL
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macro (which does not use the dialing directory) as follows:
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DEFINE DIAL TAKE xxx.SCR
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where xxx is the modem type, described below.
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The default modem type (if you are using the standard MSKERMIT.INI file) is
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HAYES. To select a different type of modem for dialing, do any one of the
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following:
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1. Type SET MODEM=xxx at the DOS prompt before starting MS-DOS Kermit, or
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2. Add SET MODEM=xxx to your AUTOEXEC.BAT file and reboot your PC, or
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3. Type DEFINE _MODEM xxx at the MS-DOS Kermit prompt, or
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4. Add DEFINE _MODEM xxx to your MSCUSTOM.INI file.
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xxx is name of the modem, corresponding to the part of the dialing script
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filename before ".SCR". For Telebit T3000 modems, for example, the script
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file is called T3000.SCR, and "xxx" would be "T3000". If you obtain these
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files over the network, you should rename as shown in the DOS Filename column
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below. Here are the dialing scripts that are supplied with MS-DOS Kermit:
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Modem Type DOS Filename Internet BITNET/EARN/CREN
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Hayes 1200 or 2400 HAYES.SCR kermit/a/msmhayes.scr MSMHAYES SCR
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* Hayes Ultra 144 ULTRA144.SCR kermit/a/msmultra.scr MSMULTRA SCR
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* Multitech MT1432 MT1432.SCR kermit/a/msmmt1432.scr MSMMT1432 SCR
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* Penril Alliance V.32 PENRIL.SCR kermit/a/msmpenril.scr MSMPENRIL SCR
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* Practical Peripherals PP14400.SCR kermit/a/msmpp14400.scr MSMPP1440 SCR
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Rolm CBX DCM ROLM.SCR kermit/a/msmrolm.scr MSMROLM SCR
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* SupraFAXmodem V.32bis SUPRA.SCR kermit/a/msmsupra.scr MSMSUPRA SCR
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* Telebit QBlazer V.32 QBLAZER.SCR kermit/a/msmqblazer.scr MSMQBLAZER SCR
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* Telebit T3000 V.32bis T3000.SCR kermit/a/msmt3000.scr MSMT3000 SCR
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* US Robotics Sportster SPORT.SCR kermit/a/msmsport.scr MSMSPORT SCR
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Vadic VA2400PA VA2400PA.SCR kermit/a/msmva2400.scr MSMVA2400 SCR
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If your modem does not appear in this list, feel free to adapt one of these
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scripts to work with your modem (and send your new script back to Columbia so
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others can use it too).
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WHAT THE DIALING SCRIPTS HAVE IN COMMON
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These scripts use your modem's default dialing method, pulse or tone; they do
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not specify one or the other, since neither method is supported by all
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telephones everywhere. To force Tone dialing, begin your phone number with T,
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for example:
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DIAL T7654321
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Similarly, to force pulse dialing, start the phone number with P.
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If you give a DIAL command whose telephone number is simply = (equal sign),
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the modem will be initialized, but no call will be placed. In some cases,
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the dialing script will also ask the modem to display its configuration.
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When dialing a real phone number, you can include special characters in the
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phone number to accomplish pauses, wait for secondary dialtone, etc. See your
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modem manual.
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If you dial a number that is busy, most of these scripts will wait 30 seconds
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and then redial automatically, up to 5 times. You can cancel the redial
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operation by pressing any key after you see the message:
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Line is busy, will dial again in 30 seconds.
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Press any key to cancel...
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Each dialing script returns SUCCESS if dialing succeeds and FAILURE if it
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doesn't, so you can use an IF FAIL or IF SUCCESS statement after a DIAL
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command in a script.
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THE ROLM DIALING SCRIPT
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ROLM.SCR is for the Rolm/Siemens (formerly IBM) Computerized Branch Exchange
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(CBX) data communications module (DCM). It dials at your current speed, and
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does not change speeds since the DCM is speed-sensitive. It does not attempt
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to redial if the line is busy. For Rolm 244PCs, use HAYES.SCR, and always use
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Tone dialing.
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THE HAYES 1200/2400 AND VADIC 2400PA DIALING SCRIPTS
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The Hayes 2400 script, HAYES.SCR, should work on any Hayes-1200, Hayes-2400,
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or compatible modem. It does not change any modem settings (S registers). It
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assumes that the modem changes its interface speed to match the negotiated
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modulation speed, if the modulation speed is reported as 1200 or 2400;
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otherwise, Kermit does not change speed.
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The Vadic 2400PA script, VA2400PA.SCR, works in much the same way, except it
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also recognizes a 300 bit-per-second connect message. The Vadic modem
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supports only pulse dialing.
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HIGH-SPEED MODEM SCRIPTS
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The entries marked with "*" above are for high-speed modems that include
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error-correction and data-compression features. These scripts attempt to use
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these modems at a fixed interface speed of 57600 bps (or 38400 bps, if that is
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the highest speed supported by the modem), to allow the modem's data
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compression to operate at its full effectiveness, and they enable hardware
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flow control (RTS/CTS) to prevent loss of data. Note that flow control will
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be fully effective only if the answering modem and computer also have an
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effective flow control method between them.
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The high-speed modem scripts:
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. Configure the modem to echo commands, issue verbose result codes, and
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hang up upon loss of DTR from the PC (as when you tell Kermit to HANGUP).
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(If Kermit's HANGUP command doesn't work with your modem, you can find
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a workaround in the KERMIT.BWR (MSKERM.BWR) file.)
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. Start out at the highest supported modulation, V.32bis, with downwards
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negotiation enabled (V.32, V.22bis, etc.) If a lower modulation technique
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is negotiated, the interface speed remains fixed and the modem does "speed
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buffering", for which effective flow control is an absolute requirement.
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. Enable error correction and compression, starting out at the highest
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supported levels (V.42 and V.42bis) and falling back to lower levels
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(usually MNP), or to none at all.
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. Configure to modem to pass BREAK signals through transparently when you
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type Alt-B.
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Dialing Interface Highest Error Data
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Script Speed Modulation Correction Compression
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PENRIL 38400 V.32(bis?) V.42->MNP V.42bis->MNP
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PP14400.SCR 57600 V.32bis V.42->MNP V.42bis->MNP
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QBLAZER.SCR 38400 V.32 V.42->MNP V.42bis->MNP
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SPORT.SCR 57600 V.32bis V.42->MNP V.42bis->MNP
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SUPRA.SCR 57600 V.32bis V.42->MNP V.42bis->MNP
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T3000.SCR 57600 V.32bis V.42->MNP V.42bis->MNP
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ULTRA144.SCR 38400 V.32bis V.42->MNP V.42bis->MNP
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The Telebit T3000 script should also work on the Telebit WorldBlazer.
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The Telebit QBlazer script should also work on the Telebit T1600.
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The Hayes Ultra 144 gives you a failure code if the modem reports NO CARRIER:
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0 Normal hangup
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4 Physical carrier loss
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5 Error control was required but was not negotiated
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6 Other error-control modem did not respond to feature negotiation
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7 Other modem is synchronous-only
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8 Modems could not find a common framing technique
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9 Modems could not find a protocol in common
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10 Incorrect feature negotiation message sent by other modem
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11 Timed out waiting for synchronous data
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12 Normal disconnect initiated by other modem
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13 Other modem did not respond after many retransmissions
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14 Protocol violation
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15 Compression failure
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For further information, read the script files themselves. They are ordinary
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text files that you can TYPE, PRINT, or view with a text editor such as DOS
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5.0 EDIT.
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(End of MODEMS.DOC)
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