sgore@attunix.att.com (Stephanie Gore) (01/15/91)
UNIX System Laboratories, Inc.
A Subsidiary of AT&T
November 15, 1990
The AT&T OSI Communications Platform Release 1 (CP-1) source product
is a portable, STREAMS-based, kernel implementation of the middle and
upper layer OSI protocols. Designed specifically for UNIXR System V,
it provides a standard implementation of common ISO and CCITT
Protocols for UNIX Systems that need OSI networking. CP-1 creates an
environment in which to design, develop, and execute OSI Applications.
UNIX System V offers one of the best operating systems for taking
advantage of the long-term gains achieved from Open Systems
Interconnection. UNIX System V and the CP-1 Core Stack are the
foundation for AT&T's ACCUMASTER INTEGRATOR Network Management System.
The AT&T OSI CP-1 product family includes the following
products:
o CP-1 Core Stack - supports the middle and upper layers
of the OSI Reference Model
o Abstract Syntax Notation 1 Compiler (ASN.1)
o File Transfer, Administration, and Management (FTAM)
o Common Management Information protocol (CMIP)/ Common
Management Information Service Element (CMISE)
o LAN Package
CP-1 Core Stack
The CP-1 Core Stack product consists of the middle and upper layers of
the OSI Reference Model, which together perform the core
communications protocols needed to communicate in an open system. The
CP-1 product provides facilities for writing applications over the
protocol stack through user- level C language library (specifically,
ACSE/Presentation Library Interface) and a command interface
(Operations, Administration & Maintenance) to administer the product.
ASN.1
The CP-1 product family also includes an ASN.1 compiler along with a
Basic Encode/Decode Library (BEDL) that enables proper handling of the
presentation services of data encoding and decoding. From an ASN.1
abstract syntax definition, the ASN.1 Compiler generates C language
structure definitions and source code which can represent, encode and
decode instances of that abstract data.
FTAM
The OSI File Transfer, Access and Management (FTAM) services support
applications that need to transfer, access or manage information held
by systems in the form of stored files. The real systems that hold
these files can vary greatly in the way they store a file, locate and
open a file as well as construct the attributes that define a file.
FTAM maps the structure and attributes of files as they exist on real
systems (real filestores) through virtual filestores. Virtual
filestores can provide applications with a common view of files that
may be represented quite differently on real systems. FTAM is
implemented as a user level shared library.
CMIP
The OSI Common Management Information Service Element (CMISE) is a
collection of Application Layer Services specified for network
management operations. CMISE imposes a network management framework
in which different real open systems can exchange network management
information and manipulate network management objects. This
management information is split into the following categories:
configuration, fault, security, accounting and performance management.
Network management information such as alarms and configuration data
can be accessed remotely via a set of protocols defined as the Common
Management Information Protocol (CMIP). This set of protocols is
invoked over an association by the services provided by the Remote
Operations Service Element (ROSE). The CMIP/CMISE contains Remote
Operation Service Element (ROSE) and implemented as a user level
shared library.
LAN Package
The LAN Package provides for Connectionless Layer Network Protocol
(CLNP), End System to Intermediate System (ES-IS) Routing Exchange
Protocol, Transport Class 4, and Connectionless Transport Protocol.
AT&T USL/Retix Strategic Partnership
On May 30, 1990 AT&T and Retix, the Santa Monica-based OSI
internetworking company, signed an agreement which paves the way for
the integration of the current Open Systems technologies of Retix and
AT&T's UNIX System Laboratories and the co-development of future
products based upon those technologies. The alliance focuses on
enhancing the development of Open Systems Interconnect(OSI) technology
within the UNIX operating system environment.
The integrated product line will provide users with a full suite of
OSI functionality, designed to be fully integrated with the UNIX
System V STREAMS operating environment via CP-1. OSI functionality
offered in the initial product will include: X.400 messaging services,
X.500 directory services, File Transfer, Access and Management (FTAM),
CMIP Network Management Services, and Virtual Terminal (VT). The
agreement also calls for the provision of TCP/IP-to-OSI migration
products, including gateways to TCP/IP-based electronic mail and file
transfer applications. In addition to the initial product offering,
UNIX System Laboratories and Retix have committed to the ongoing
development and marketing of a broader spectrum of OSI-oriented
applications for UNIX System V.
For more information, please contact Mark J. Comishock
at (201) 522-6107.