syac(7)                          DG/UX 5.4.2                         syac(7)


NAME
       syac - AViiON family intelligent asynchronous controller

DESCRIPTION
       A SYAC is an intelligent asynchronous terminal I/O controller that
       controls a number of terminal lines.  The controllers supported are
       as follows:

            Name         # Lines   Description

            VAC/16       16        Asynchronous 16-port controller;
                                   supports modem control

            VDC/8P       8         8-port cluster control box with
                                   printer port; supports modem control

            VDC/16       16        16-port cluster control box;
                                   supports modem control

            VDA/128      128       Terminal server host adapter

            VDA/255      255       Terminal server host adapter

            VTC/256      256       Telnet server host adapter

       The VDA/128 controller is an ARCNET controller supporting up to 128
       asynchronous lines using the VDC/8P and/or VDC/16 remote cluster
       controllers.  The VDA/255 controller supports up to 255 lines using
       the VDC/8P and/or VDC/16 remote cluster controllers.

       The VTC/256 controller is an ethernet controller supporting up to 256
       telnet connections.  The VTC/256 supports a general board internet
       address and optional tty specific internet addresses.  By default,
       telnet binary mode is negotiated on when a connection is established.
       This behavior can be specified on a per-tty basis in the
       /etc/tcload/vtc.addrs file.

       Intelligent controllers are actually processors that perform I/O
       processing according to the tty modes in effect for each line.  It is
       necessary for the system administrator to load the SYAC-resident code
       image into SYAC memory before lines controlled by the SYAC can be
       used (see tcload(1M)).

       Terminals controlled by SYACs present the standard DG/UX terminal
       interfaces described in termio(7).  All model SYACs support all
       specified baud rates.

FILES
       /dev/tty[0-9]*                 Terminal device files
       /dev/async/syac*               SYAC control nodes
       /usr/lib/tcload/models/syac/*  SYAC related files
       /etc/tcload/vtc.addrs          SYAC VTC Configuration file





Licensed material--property of copyright holder(s)                         1

syac(7)                          DG/UX 5.4.2                         syac(7)


SEE ALSO
       tcload(1M), vtc.addrs(4), termio(7).























































Licensed material--property of copyright holder(s)                         2