Technical Reference 41459
TECHNICAL REFERENCE 41459 AT&T Network Integrated Services Digital Network (ISDN) Primary Rate Interface and Special Application Specification User - Network Interface Description June, 1999 DIRECTOR – Switched Network Architecture and Planning Center ©AT&T, 1999, Printed in U.S.A. AT&T NETWORK INTEGRATED SERVICES DIGITAL NETWORK (ISDN) PRIMARY RATE INTERFACE AND SPECIAL APPLICATIONS SPECIFICATION USER-NETWORK INTERFACE DESCRIPTION CONTENTS OVERVIEW: General Information and Features PART I: Layer 1 - Physical Layer Implementation PART II: Layer 2 - Link Layer Implementation PART III: Layer 3 - Protocol Implementation APPENDIX 1: Service Specific Capabilities APPENDIX 2: Alternate Destination Call Redirection APPENDIX 3: Vari-A-Bill APPENDIX 4: Enhanced Service Provider - Credit Checking Application ANNEX A: User Side and Network Side SDL Diagrams ANNEX B: D-Channel Backup Procedures ANNEX C: Cause Definitions ANNEX D: Examples of Information Element Codings NOTICE AT&T publishes this Technical Reference as a guide for the designers, manufacturers, consultants and suppliers of systems and equipment which would meet the described interface. AT&T reserves the right to revise this Technical Reference for any reason, including, but not limited to, conformity with standards promulgated by ANSI, EIA, ITU-T, ISO, or similar agencies; use of new advances in the state of technical arts; or to reflect changes in the requirements of communication systems or equipment. Liability for difficulties arising from technical limitations is disclaimed. In addition, AT&T makes no claims or representations and assumes no responsibilities beyond those set forth in the applicable tariffs. No license under AT&T’s intellectual property rights (including, in particular, patents and copyrights) or intellectual property rights of others are provided by the furnishing of this document, nor does the furnishing of this document indicate that the use of any information contained in it will be free of infringement of any intellectual property rights.
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