TIESSCAN.EXE

The TIES-SCAN Program will scan a PC hard drive and identify files
that contain any of three of the most common TIES escape sequences.
This program is provided so that people can see if the most common 
TIES sequences appear in their data. 

The TIES escape sequence is determinded mainly by how the modem
is programmed by the comm software.  The default for most modems is
+++AT<string><CR> and this is used by most software (type 2 below).
However the "+" and <CR> characters can be reprogrammed by the comm 
software; however, the Hayes Smartcom programs are the only ones I 
have observed to do this. Smartcom reprograms the "+" character 
differently for the originating modem and the answering modem. Here 
we are only concerned with the originating modem. Note that if your
comm software reprograms the "+" or <CR> to something different from
the way Smartcom does, this program will not detect those sequences.

The rules for <string> seem to vary between TIES modems and definitions.
This program was designed based on the observed behavior of a Multi-Tech
MultiModem II, which is as follows.  <string> can be empty, or start with 
a letter and be one to four characters long. Also the "A" or the "T" can
be lower case.  In all sequences found so far, <string> is empty or "H", 
which would fit any of the definitions of TIES I have seen or observed.

The three sequences detected are described in the table below.

Type     "+" Character  <CR> Character      Example Software

 1.        1D hex (^])   Carriage Return      Recent Smartcom
 2.           "+"        Carriage Return      Most others
 3.        1D hex (^])      1E hex            Smartcom before 1987

To scan your C: drive, put a diskette in a floppy drive with TIESSCAN.EXE
in the root directory (e.g., A:\).  Type A:  at the DOS prompt, then
type TIESSCAN C.  The program will ask the user to type a line of ID 
information about the machine being scanned. You will see filenames listed 
on the screen as they are scanned, with a report when all have been scanned.

The results of the scan are recorded in a file on the diskette named
ESC_LOG.TXT.  Top view this file type BROWSE ESC_LOG.TXT at the DOS 
prompt.  If you scan several machines, the ESC_LOG.TXT file will add
new results to the previous results.

The following is an example of a scan report found in ESC_LOG.TXT
for each machine scanned: 

-
ATD Fileserver 5923 386-20 2partitions 1-200Mb IDE drive
###    Started: Fri Sep 11 08:32:54 1992
    
08:39:57    0   1   0  D:\PUBLIC\GAMES\VETTE\VETTE.EXE
Done 09:02:40  Files:  5730 , Bytes: 133981085,  Bytes/sec: 74975
*** 09:02:40    TIES Files Found: 1

This indicates that one file with TIES was found (a game, VETTE.EXE).
The " 0   1   0 " before the file name indicates that it contain zero
Type 1, one Type 2, and zero Type 3 sequences. Note that 133.98 megabytes
were scanned, at 75 kbytes per second, so the scan took about 30 minutes.

CAUTION:  When files are transferred with a file transfer protocol, 
additional characters (the packet header and CRC) are inserted. Because
of this there is a small chance that even though this program does not 
find a TIES sequence in a file, the file transfer could still have a TIES 
sequence after the protocol characters are inserted.  Likewise, there is a 
small chance that a file with a TIES sequence could have that sequence 
interupted by protocol characters so that a TIES modem would not be affected 
when the file is transferred.

John Copeland