Start of the man page for xt:

XT(1)                                UNIX                      (printed 7/8/97)

Name
        xt - communications program using telnet

Syntax
        xt [ [-nhostname] | [-sscript] ]

Description
        Xt connects to a remote host using the telnet protocol. It can manage
        an interactive session or be called from cron(C).  It has various means
        for transferring files between computers, and can be partially or
        totally under the control of scripts.

   ....    ....    ....

Description used in the Compuserve Libraries:

Too many features to list them all. Supports shell escapes; capture to disk
files; transmit from disk files; powerful script language includes access to
shell commands & variables; built-in CompuServe B+ support; access to
external transfer protocols.

XT 1.2 TELNET B+ B-PLUS PROTOCOL COMMUNICATIONS
XT: source code, scriptable telnet program

   ....    ....    ....


Jean-Pierre Radley wrote this program, based on xc, which is based on xcomm.
Further historical notes are in the README in the source code tree.

The canonical source location is in the /pub directory of ftp.jpr.com.


In a word: telnet with scripting and capture files...