The TIES Search Program will scan a Macintosh 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 determined 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 Macintosh drive, read the TIES Search Readme file in the TIES Scan folder.
Note: 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 interrupted by
protocol characters so that a TIES modem would not be affected when the