The Question is:
what are the modem settings necessary to connect to tta0: on a alpha server
The Answer is :
The answer depends highly on the particular AlphaServer, and
its particular (serial versus graphics) console settings.
Topics of interest for modems and wiring modems include (81),
(153), (300) and others.
For information on the com serial line ports, see topics such
as (5576) and please see the OpenVMS FAQ.
For wiring pinouts, please see the URLs referenced in the FAQ.
Specifics of configuring the modem itself will require a review
of the modem's documentation.
Access to and use of a serial-line breakout box will be useful.
This device is is a diagnostic tool that can be invaluable in
determining the particular wiring requirements and in debugging.
Use of DECconnect adapters (see the FAQ) are recommended for
most serial connections, but provide insufficient signals within
the BC16E cabling for use with a modem connection.