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Фрагмент инструкции
1. Overview
The Datacomm Terminal Controller (DTC) product is a multi-protocol
networked device used at many MPE/iX and HP-UX sites to provide networked
access to the system via many different protocols (e.g. serial terminal, serial
printer, Telnet access, X.25 PAD, X.25 System to system..etc). Configuration
and management of the DTC can be done either through system-based utilities,
such as NMMGR or DTCMGR/UX or a PC based utility that sits on top of
Openview, the OpenView DTC Manager (OVDTCMGR).
The OVDTCMGR utility was developed so a single point of management
could be used to manage a complex network of HP systems and DTCs that
would be separated from the tasks and operations on any of the HP server
systems. OVDTCMGR was originally developed to run on top of OpenView
written for version 3.1 of the Microsoft Windows operating system. In the
following years, OVDTCMGR was updated to run under Windows 95 and
Windows 98.
At the time of the OVDTCMGR utility development, a decision was made that
the OVDTCMGR program was going to be the primary management utility for
DTCs, since it would be independent as to whether MPE/iX or HP-UX systems
were being accessed by the DTCs. With this decision, a greater level of
functionality was added to the OVDTCMGR utility, including the ability to specify
X.25 PAD/System-to-system switching information, routable AFCP support and
Telnet Access Card support. Users wanting this functionality had no choice but
to use the OVDTCMGR as their DTC management platform.
Also, in complex networks, the OVDTCMGR provides an option to managing
DTCs at remote locations since many of the protocols supported over the DTC
are not routable. These HP proprietary protocols are used for connections into
MPE/iX systems and form the basis for the serial terminal and printer access
used by many MPE/iX customers.
In late 2002, the Workgroup Node Manager module of the OpenView product
that runs on top of the Win95/Win98 platform will fall out of support. While the
OVDTCMGR product will still be supported, the underlying OpenView software
for the Win95/Win98 platform will not. A project is currently underway within the
MPE/iX lab to enable the MPE/IX NMMGR management tool to support all
current DTC functionality, including enhanced X.25 system-to-system/PAD
switching, Routable AFCP and the Telnet Access Card. At the completion of this
project, NMMGR DTC configuration functionality will be identical to the
OVDTCMGR program. At the writing of this paper, much of this project has been
completed and is in the test phase. This white paper will outline different options
for remote management of DTCs with advantages and disadvantages specified
for each.
2. Detailed Problem Statement
When the DTC product was first developed, its intention was focused on
provided serial printer and terminal access to an MPE/iX system via a networked
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