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Monster Media 1994 #1
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MODEM
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LXFRETC.ZIP
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READ.ME
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1994-01-31
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DESCRIPTIONS OF FILES ON DISKETTE
The following is a list of the files that are included with the LXFER
File Transfer Utilities disk:
TRANSWIN.EXE -- Windows file transfer program
TRANSWIN.HLP -- Help file for the Windows transfer program
TRANSOS2.EXE -- OS/2 file transfer program
TRANSOS2.HLP -- Help file for the OS/2 transfer program
TRANSDOS.EXE -- DOS based file transfer program
_____________________________________________________________________________
MICROSOFT WINDOWS
To load TRANSWIN.EXE for Windows perform the following steps:
1. Run the INSTALLATION from the LXFER disk. This copies selected
sets of the LXFER files to your harddisk.
2. Load Windows.
3. Use the Windows File Manager to locate the directory where the
TRANSWIN files are installed (default: "\TRAN").
4. Resize the File Manager window to allow access to the group
where TRANSWIN will be placed.
5. Point to and drag the TRANSWIN.EXE file from the File Manager
window to the appropriate group. All done.
_____________________________________________________________________________
OS/2 INSTALLATION
To load TRANSOS2.EXE for OS/2 perform the following steps:
1. Run the INSTALLATION from the LXFER disk. This copies selected
sets of the LXFER files to your harddisk.
2. Enter the desktop environment again.
3. Open the icon of your hard disk, and double click on the
subdirectory where the TRANSOS2 files are located.
4. Resize the window to allow access to the desktop where you wish
to put the TRANSOS2 program.
5. Use the right mouse button to drag the file TRANSOS2.EXE from
the sub-directory window to an appropriate place on the Desktop.
Installation is done.
_____________________________________________________________________________
SOFTWARE SPECIFICATIONS
Max Baud Background Transfer Compression Security
-------- ------------------- ----------- --------
TRANSDOS 115,200 NO YES YES
TRANSOS2 57,600 YES NO YES
TRANSWIN 19,200 YES NO YES
Modem Support Parallel Auto Send/Receive
------------- -------- -----------------
TRANSDOS YES YES YES
TRANSOS2 YES NO YES
TRANSWIN YES NO YES
Protocol Packet Size File Names Compression Auto Modes Parallel Support
-------- ----------- ---------- ----------- ---------- ----------------
Xmodem 128 NO NO NO YES
Xmodem-1K 1024 NO NO NO YES
Xmodem-1KG 1024 NO NO NO YES
Ymodem 1024 YES NO NO YES
YmodemG 1024 YES NO NO YES
Direct 2048 YES YES YES YES
_____________________________________________________________________________
PROTOCOLS
All of the Xmodem protocols require both the sender and the receiver
to input the filename of the file to transfer, and only one file at a time
may be sent using this meathod. Using the file selectors of the different
programs, you can select more than one file to transfer, but if you are
using one of the Xmodem protocols, only the first file will be transferred.
Ymodem transfers differ from the Xmodem transfers only by a header packet
that contains the information about the file being transferred. The 'G'
extension on the end of the protocols means that the protocol does not
require an acknowledgement from the receiver after each packet. If a CRC
error is detected, the transfer will abort, and no packets will be resent.
The 'G' protocols were designed primarily for error correcting modems that
have the capability internally of retransmitting lost packets.
_____________________________________________________________________________
COMPRESSION
Compression may only be used with the Direct (proprietary) protocol.
When transferring files that are already compressed (.zip/.lzh/.arc),
the compression scheme may actually produce more bytes to transfer causing
the transfer to be slower than it would have been without compression.
_____________________________________________________________________________
AUTOMATIC MODES
Only one of the automatic file transfer modes can be used at a given time.
If a PC is set to automatic receive mode, the remote PC can transfer files to
the local PC the same as it would normally do. The difference is that the
receiving PC will automatically start a new transfer when the last one is
complete. Auto Send mode is a little more complicated. To use the automatic
send mode, the sending PC must have Auto Send mode selected. This PC then
waits for the remote PC to request file sets for transferring. The PC that
requests files must check the box labeled "Request files from remote" on the
receive screen before pressing the receive button. When the receive button
is pressed, a dialog will come up with a list of the files from the remote
machine. After selecting a file set (all of which have to be in the same
directory) and pressing the OK button, the sending machine will automatically
start a transfer. Once the transfer is complete, the sending machine will go
back to waiting for file requests.
_____________________________________________________________________________
MODEM FILE TRANSFERS:
To transfer files through the modem, first go to the modem/dialing screen.
From this screen, you may either enter a number to be dialed or set the modem
into automatic answer mode. After the phone rings, (calling or being called),
the modems will connect at a speed agreed upon by the modems. This speed will
be displayed as a message in the terminal part of the screen with the format
of: "CONNECT XXXX YYYY", where XXXX is the speed of connection and YYYY is any
possible error correction protocol or data compression. If the modem changes
the baud at which it talks to the computer based on a lower baud rate in the
connection string, our transfer programs will lose contact with the modem. To
regain contact with the modem, select the appropriate baud rate from the
settings screen. After the computers are connected via modem, they can
cancel the modem screen and go directly to the file transfer options.
_____________________________________________________________________________
CABLE PIN ASSIGNMENTS
SERIAL (Null Modem Cable) PARALLEL (DB25 to DB25)
Local Remote Local Remote
----- ------ ----- ------
1 - 1 2 - 15
2 - 3 3 - 13
3 - 2 4 - 12
4 - 5 5 - 10
5 - 4 6 - 11
7 - 7 10 - 5
6,8 - 20 11 - 6
20 - 6,8 12 - 4
13 - 3
15 - 2
NOTE: The parallel data transfer cable should not be confused with a
standard straight through parallel cable for printing.
««« End of READ.ME »»»