Table Of ContentNIST Special Publication 823-4
Computer
Systems
Integrated Services Digital
Technology
Network Conformance Testing
DEPARTMENTOF
U.S.
COMMERCE
-
TechnologyAdministration Layer 2 Data Link Layer (LAPD)
National Instituteof
Standards and
Technology Part 1 — Basic Rate Interface, User Side
NIST
m he National Institute of Standards and Technology was established in 1988 by Congress to "assist
industry in the development of technology . . . needed to improve product quality, to modernize
manufacturing processes, to ensure product reliability and to facilitate rapid commercialization ... of
. . .
products based on new scientific discoveries."
NIST, originally founded as the National Bureau of Standards in 1901, works to strengthen U.S.
industry's competitiveness; advance science and engineering; and improve public health, safety, and the
environment. One of the agency's basic functions is to develop, maintain, and retain custody ofthe national
standards of measurement, and provide the means and methods for comparing standards used in science,
engineering, manufacturing, commerce, industry, and education with the standards adopted or recognized
by the Federal Government.
As an agency of the U.S. Commerce Department's Technology Administration, NIST conducts basic
and applied research in the physical sciences and engineering and performs related services. The Institute
does generic and precompetitive work on new and advanced technologies. NIST's research facilities are
located at Gaithersburg, MD 20899, and at Boulder, CO 80303. Major technical operating units and their
principal activities are listed below. For more information contact the Public Inquiries Desk, 301-975-3058.
Technology Services Manufacturing Engineering Laboratory
• Manufacturing Technology Centers Program • Precision Engineering
• Standards Services • Automated Production Technology
• Technology Commercialization • Robot Systems
• Measurement Services • Factory Automation
• Technology Evaluation and Assessment • Fabrication Technology
• Information Services
Materials Science and Engineering
Electronics and Electrical Engineering Laboratory
Laboratory • Intelligent Processing of Materials
• Microelectronics • Ceramics
• Law Enforcement Standards • Materials Reliability'
• Electricity • Polymers
• Semiconductor Electronics • Metallurgy
• Electromagnetic Fields' • Reactor Radiation
• Electromagnetic Technology'
Building and Fire Research Laboratory
Chemical Science and Technology • Structures
Laboratory • Building Materials
• Biotechnology • Building Environment
• Chemical Engineering' • Fire Science and Engineering
• Chemical Kinetics and Thermodynamics • Fire Measurement and Research
• Inorganic Analytical Research
• Organic Analytical Research Computer Systems Laboratory
• Process Measurements • Information Systems Engineering
• Surface and Microanalysis Science • Systems and Software Technology
• Thermophysics^ • Computer Security
• Systems and Network Architecture
Physics Laboratory • Advanced Systems
• Electron and Optical Physics
• Atomic Physics Computing and Applied Mathematics
• Molecular Physics Laboratory
• Radiometric Physics • Applied and Computational Mathematics^
• Quantum Metrology • Statistical Engineering^
• Ionizing Radiation • Scientific Computing Environments^
• Time and Frequency' • Computer Services^
• Quantum Physics' • Computer Systems and Communications^
• Information Systems
'At Boulder, CO 80303.
-Some elements at Boulder, CO 80303.
NIST Special Publication 823-4
Integrated Services Digital
Network Conformance Testing
—
Layer 2 Data Link Layer (LAPD)
—
Part 1 Basic Rate Interface, User Side
Daniel P. Stokesberry, Leslie Collica, and Kathleen M. Roberts, Editors
Advanced Systems Division
Computer Systems Laboratory
National Institute of Standards and Technology
Gaithersburg. MD 20899
September 1993
U.S. DEPARTMENT OF COMMERCE
Ronald H. Brown, Secretary
TECHNOLOGY ADMINISTRATION
Mary L. Good, Under Secretary for Technology
NATIONAL INSTITUTE OF STANDARDS
AND TECHNOLOGY
Arati Prabhakar, Director
Reports on Computer Systems Technology
The National Institute of Standards and Technology (NIST) has a unique responsibility for computer
systems technology within the Federal government. NIST's Computer Systems Laboratory (CSL) devel-
ops standards and guidelines, provides technical assistance, and conducts research for computers and
related telecommunications systems to achieve more effective utilization of Federal information technol-
ogy resources. CSL's responsibilities include development of technical, management, physical, and ad-
ministrative standards and guidelines for the cost-effective security and privacy of sensitive unclassified
information processed in Federal computers. CSL assists agencies in developing security plans and in
improving computer security awareness training. This Special Publication 823 series reports CSL re-
search and guidelines to Federal agencies as well as to organizations in industry, government, and
academia.
National Institute of Standards and Technology Special Publication 823-4
Natl. Inst. Stand. Technol. Spec. Publ. 823-4, 1134 pages (September 1993)
CODEN: NSPUE2
U.S. GOVERNMENT PRINTING OFFICE
WASHINGTON: 1993
For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402
ISDN Conformance Testing
Layer 2 -- Data Link Layer (LAPD)
Part 1: Basic Rate Interface, User Side
ABSTRACT
This document defines the abstract test specifications to verify conformance ofequipment to theLayer 2, DataLink
Layer, Link Access Procedure on the D Channel (LAPD) of an Integrated Services Digital Network (ISDN) at the
user-side of the user-network interface, for the Basic Rate Interface (BRI) access arrangements, as defined in the
International Telegraph and Telephone Consultative Committee (CCITT) Recommendation Q.921 and American
National Standard ANS T1.602. The test scripts are written in the internationally standardized Tree and Tabular
Combined Notation, TTCN. These tests were developed, internationally harmonized, and approved by members of
the North American ISDN Users' Forum (NIU/91-0012).
KEYWORDS
Abstract Test Suite, Basic Rate Interface, BRI, Conformance Testing, Implementation Under Test, lUT, ISDN,
LAPD,Protocol DataUnit,PDU,ProtocolImplementationConformanceStatement,PICS,ProtocolExtraInformation
for Testing, PIXIT, Tree and Tabular Combined Notation, TTCN
I iii
PREFACE
This document is one of a group of NIST Special Publications that will be issued on Integrated Services Digital
Network (ISDN) Conformance Testing. Each publication in this group will focus on a different setofconformance
test specifications. The following is a list of the publications in this group:
—
Integrated Services Digital Network (ISDN) Conformance Testing
Introduction - This document discusses thebasic concepts ofconformance testing and the developmentofabstract
test specifications for conformance testing of ISDN protocols.
—
Integr—ated Services Digital Network (ISDN) Conformance Testing
Layer 1 Physical Layer
• Part 1 Basic Rate S/T Interface, User Side describes a set of test specifications which verify conformance of
TEs and NTs to the ISDN Physical Layer Basic Access at the S/T reference point, as defined in ANS T1.605-
1989, and NIUF 90-105.
• Part 2 Basic Rate U Interface. LTser Side describes a set of test specifications which verify equipment
implementation conformance to the ISDN Physical Layer Basic Access at the U interface, as defined in ANS
Tl.601-1988 and NIUF 90-101.
• Part 3 Primary Rate Interface, User Side describes a set of test specifications which verify equipment
implementation conformancetothe ISDNPhysicalLayerPrimary Accessatthe S,T,andU interface, as defined
in ANS Tl.408-1990 and the corresponding NIUF Implementation Agreement.
—
Integr—ated Serx'ices Digital Network (ISDN) Conformance Testing
Layer 2 Data Link Layer, Link Access Procedure on the D Channel (LAPD)
• Part 1 BasicRate Interface,UserSidedefines the abstracttestspecifications toverifyequipment implementation
conformance to the Layer 2 of an ISDN at the user-network interface, for the BRI access arrangements, as
defined in ANS Tl.602-1989 and NIUF 90-210.
• Part 2 Primary Rate Interface, User Side will define the abstract test specifications to verify equipment
implementation conformance to the Layer 2 of an ISDN at the user-network interface, for the PRI access
arrangements, as defined in ANS Tl.602-1989 and the corresponding NIUF Implementation Agreement.
—
Integr—ated Services Digital Network (ISDN) Conformance Testing
Layer 3 Network Access Layer
• Part 1 Basic Rate Interface Circuit Switch Call Contfol, User Side defines the abstract test specifications to
verify equipment implementation conformance to the Layer 3 ofan ISDN BRI at the user-network interface for
the Basic Call Control Procedures, as defined by ANS Tl.607-1990, NIUF 90-301.
• Part 2 Primary Rate Interface Circuit Switch Call Control, User Side defines the abstract test specifications to
verify equipment implementation conformance to the Layer 3 ofan ISDN PRI at the user-network interface for
the Basic Call Control Procedures, as defined by ANS Tl.607-1990, NIUF 90-302.
iv
• Part 3 Packet Switched Call Control will define the abstract test specifications to verify equipment
implementation conformance to the Layer 3 of an ISDN at the user-network interface for the Packet Switched
Call Control Procedures, as defined by ANS Tl.608-1990, NIUF 90-320, and other corresponding NIUF
Implementation Agreements.
—
Integrated Services Digital Network (ISDN) Conformance Testing
Supplementary Services - This document will define the abstract test sjjecifications to verify implementation
conformance to the Supplementary Services at the user-network interface, as defined in ANS Tl.610-1990, NIUF
90-311, and other appropriate ANS documents and their corresponding NIUF Implementation Agreements.
—
Integrated Services Digital Network (ISDN) Conformance Testing
Packet Mode Bearer Services Control Procedures - This publication will define the abstract test specifications to
verify implementation conformance to the Packet Mode Bearer Services Control Procedures.
—
Integrated Services Digital Network (ISDN) Conformance Testing
Terminal Adaption - This document will define the abstract test specifications to verify equipmentimplementation
conformance to the ISDNCircuit-Mode DataTerminal Adaption using Statistical Multiplexing, as definedby ANS
Tl.612-1990 and the corresponding NIUT Implementation Agreement
V
NOTICE OF DISCLAIMER
tms document contains niuf conformance tests as agreed among participating expert technical
personnel according to the texts of isdn standards, conhgurations and descriptions that are
intended to promote interoperability and efhciency. these conformance tests were developed and
approved by organizations participating in the north american isdn users' forum (niuf) meetings.
Neither The National Instttute Of Standards And Technology (NIST) nor any of the participants in
THE NIUF make any representation OR WARRANTY, EXPRESS OR IMPLIED WITH RESPECT TO THE SUFHCIENCY,
ACCURACY, OR USE OF ANY INFORMATION OR OPINION CONTAINED HEREIN. THE USE OF THIS INFORMATION OR
OPINIONIS ATTHERISK OFTHE USER. UNDERNO CIRCUMSTANCES SHALLNIST, OR ANYPARTICIPANTINTHENIUF
BE LIABLE FOR ANY DAMAGE OR INJURYINCURRED BY ANY PERSONARISING OUTOF THE SUFHaENCY, ACCURACY,
OR USE OF ANY INFORMATION OR OPINION CONTAINED HEREIN.
vi
ACKNOWLEDGMENTS
MST
would like to acknowledge the NIUF ISDN Conformance Testing (ICOT) Working Group, and especially the
following individuals for their valuable technical contributions to this document:
List of Contributors Organization
Venkatesh Basapur Bellcore
Wing-Man Chan Northern Telecom
Yi Chin AT&T Bell Laboratories
Leslie CoUica, Technical Editor NIST
Jonathan Gloster COS
Chris Leising Bellcore
John H. Moore IBM
Paul Panish Current Technology
Pierre Prescott Northern Telecom
Kaihryn Sintal IBM
Perry Sherman IDACOM/HP
David Su NIST
Omit Uyar AT&T Bell Laboratories
vii
