So we've reset the modem and created a new tty in case the original kludged and we're still getting a wedge?
You're going to have to minicom into it.
Quote:
MINICOM(1) Version 2.6.1 MINICOM(1)
NAME
minicom - friendly serial communication program
SYNOPSIS
minicom [-somMlwz8] [-c on|off] [-S script] [-d entry]
[-a on|off] [-t term] [-p pty] [-C capturefile] [configuration]
DESCRIPTION
minicom is a communication program which somewhat resembles the shareware program TELIX but is free with source code and runs under most Unices. Features include dialing directory with auto-redial, support for UUCP-style lock files on serial devices, a separate script language inter-preter, capture to file, multiple users with individual configurations, and more.
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Run a "man minicom", I haven't used it in a while because I don't deal with tty devices much anymore, at least not ones that wedge, but as I remember it wasn't that hard to set up and use.