This manual explains how to use the DTC Device
File Access Utilities (DDFA) and the Telnet Port Identification
feature to communicate with HP 9000 serial devices connected to
network terminal servers such as the HP Datacommunications and Terminal
Controller (DTC). DDFA facilitates
the use of
pseudoterminal
(pty)
device files to open outgoing Telnet connections to the DTC or other
terminal server, while Telnet Port Identification uses them to establish
incoming Telnet connections from known devices on the server. Telnet
is one of the HP 9000 Internet Services
(HP B1030B), formerly known as the HP 9000 ARPA Services.
DDFA was originally designed for use with DTCs, but as of
HP-UX 10.0, it can now be used with other terminal servers which
use addressing schemes similar to the DTC. There will be some guidelines
on how to configure DDFA for use with non-DTC terminal servers,
but the DTC will be used as the primary example throughout this
manual.
In addition, there is general discussion on the topic of pty
use with HP DTC terminal servers versus the HP MUX, and how to troubleshoot
incoming and outgoing DDFA connections.
