US GOVERNMENT OPEN SYSTEMS PROCUREMENT (Open Systems Communication - Feb. 1987, pg. 4)


William Daul / McDonnell-Douglas / APD-ASD (WBD.MDC@OFFICE-1.ARPA)
6 Mar 87 00:02 PST


The US Government Open Systems Interconnection User's Committee, which was
established by the National Bureau of Standards, is preparing a standard for
the procurement of OSI products by Federal Agencies in the US. The draft of
this standard, Government Open Systems Interconnection Procurement (GOSIP)
Specification for the Fiscal Years 1987 and 1988, is currently being reviewed
by government and industry. The purpose of the Government OSI User's Committee
is to develop and maintain a Federal Government procurement specification for
open systems computer network products. As such, the specification supports
the Office of Management and Budget's (OMB) pending policy, "United States
Government Computer-Communications Architecture Policy".

It is expected that the Administrator of the General Services Administration
(GSA) will provide for the implementation of OSI according to the GOSIP
specification. The NBS will issue this specification as a Federal Information
Processing Standard (FIPS), and the National Communications System (NCS) will
issue GOSIP as a Federal Standard.

Organizations contributing to the development of the GOSIP specification are as
follows:

   Dept. of Agriculture
   Dept. of Commerce
   Dept. of Defense
   Dept. of Energy
   Environmental Protection Agency
   General Services Administration
   Health and Human Services
   Dept. of Interior
   Dept. of Housing and Urban Development
   Dept. of Justice
   Labor
   NASA
   NSF
   OMB
   Dept. of Transporation
   Dept. of Treasury
   National Communitations System

This specification is based on agreements reached at the NBS workshop for
Implementors of OSI. GOSIP is consistent with, and complementary to, the
Manufacturing Automation Protocol (MAP) and the Technical and Office Protocols
(TOP) specifications developed by industry. GOSIP addresses the need of the
Federal Government to move immediately to multivendor interconnectivity without
sacrificing essential functionality already implemented in critical networking
systems. All capabilities described in the specifications exist as standard
products or are close enough to market that they can be implemented by vendors.

GOSIP is to be used by all Federal Government agencies when procuring data
processing systems of services and communications systems or services. It is
mandatory for all new network implementations and should be carefully
considered for retrofits. For a period of two years, agencies are permitted to
procure alternative interoperable protocols, by they must provide a mechanism
for those protocols to interoperate with OSI protocols as well.

GOSIP addresses communication and interoperation among end-systems and
intermediate systems. It provides specific peer-level, process-to-process, and
terminal access functionality between computer systems within and across
government agencies. The primary source of protocol specifications used in
GOSIP is the Implementation Agreements of Open Systems Interconnection
Protocols, which is maintained by the NBS Workshop. Because the Workstation
Agreements continue to evolve, GOSIP augments protocol and service
specifications for the following sources,

   ISO Standards and CCITT Recommendations

   ISO Draft International Standards

   ISO Draft Proposed Standards

   Working papers within international standards bodies

GOSIP's use of open systems standards minimizes the number of standards used
while satisfying the diverse application encompassing government-wide needs.
The specification provides a range of protocol choices at different layers. A
subset of these protocols may adequately satisfy an individual acquisition
requirement, and may be used. At least on lower layer technology must be used
(i.e., CSMA/CD, Token Bus, or X.25). The following protocols are mandatory:
the connectionless internetwork protocol, Transport Class 4, and Session Layer
protocol. Transport Class 0 is to be used only in conjunction with public
network messaging. The Presentation Layer protocol and Common Application
Service Elements (CASE) are required for all applications except messaging. At
least on Application Layer protocol is required to support the intended
application. That is, if messaging is required, MHS will be specified; if file
transfer is required, FTAM will be specified.

The GOSIP specification will be revised annually and will be corrected or
amended as needed. The current draft of GOSIP will apply to fiscal years 1987
and 1988. OMNICOM subscribers can obtain a cop[y of the draft (Dec. 18, 1987)
GOSIP specification as an OMNICOM File.



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