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22、TIONS. TSB-102.BADA-A i Foreword This foreword is not part of this document. This document has been developed in response to a request by the APCO/NASTD/FED Project 25 Steering Committee as provided for in a Memorandum of Understanding (MOU) dated April 1992 and amended December 1993. That MOU state
23、s APCO/NASTD/FED shall devise a common system standard for digital public safety communications (the Standard) commonly referred to as Project 25 or P25, and that TIA, as agreed to by the membership of the appropriate TIA Engineering Committee, will provide technical assistance in the development of
24、 documentation for the Standard. If the symbol “P25“ or the wording “Project 25“ appears on the cover sheet of this document when published that indicates the APCO/NASTD/FED Project 25 Steering Committee has adopted this document as part of the Standard. The appearance of the abbreviation “P25” or t
25、he wording “Project 25” on the cover sheet of this document or in the title of any TIA document referenced herein should not be interpreted as limiting the applicability of the information contained in the document to “P25” or “Project 25” implementations exclusively. This document provides an infor
26、mative overview of the Telephone Interconnect Interface (Et) as well as examples of possible external access methods and how these could be used to allow LMR systems to provide basic telephone service to their subscribers. The TIA makes no claims as to the applicability of the information contained
27、in this document for any purpose although it is believed that the information will prove to be invaluable to manufacturers and operators of equipment applicable to Telephone Interconnect. Some aspects of the information contained in this document may not have been operationally tested; however, a gr
28、eat deal of time and good faith effort has been invested in the preparation of this document to ensure the accuracy of the information it contains. TSB-102.BADA-A ii TABLE OF CONTENTS 1 INTRODUCTION . 1 1.1 SCOPE . 1 1.2 HISTORY AND REFERENCES 2 1.2.1 Document Revision History 2 1.2.2 Informative Re
29、ferences 2 1.3 TERMINOLOGY 2 1.4 INTERFACES . 4 1.4.1 EtInterface . 4 1.4.2 Umand Um2Interfaces 4 2 USER EQUIPMENT OPERATION 5 2.1 SERVICE REQUEST . 5 2.1.1 Modes 5 2.1.1.1 Buffered Mode 5 2.1.1.2 Live Key Mode . 5 2.1.1.3 List Mode 5 2.1.2 Dialed Number Buffer Size . 5 2.2 SUBSEQUENT OPERATION . 5
30、2.2.1 Trunked 5 2.2.2 Conventional 5 2.3 RECEIVING CALLS 6 2.3.1 Group Calls . 6 2.3.2 Individual Calls . 6 2.3.2.1 Trunked . 6 2.3.2.2 Conventional . 6 2.4 ADDITIONAL FEATURES 7 2.4.1 Hookflash . 7 2.4.1.1 Hookflash Using Preprogrammed Code 7 2.4.1.2 Other Methods for Hookflash . 7 2.4.2 Displays 7
31、 2.4.3 Overdial 7 2.5 CALL TERMINATION BY THE USER . 7 2.5.1 Trunked 7 2.5.2 Conventional 7 3 GENERAL RFSS OPERATION 8 3.1 FULL DUPLEX OPERATION . 8 3.2 HALF DUPLEX OPERATION 8 3.3 SIMPLEX OPERATION . 8 3.4 AUTHORIZATION . 8 3.5 CLASSES OF SERVICE 8 3.5.1 Trunked 8 3.5.2 Conventional 9 3.5.3 Additio
32、nal Features 9 3.6 ROAMERS AND WIDE AREA NETWORKS 9 3.7 CONVENTIONAL OPERATION . 9 3.7.1 Response to Requests from the SU 9 3.7.2 Call Progress Tones 9 3.7.3 Availability check for individual incoming calls 10 3.7.3.1 Availability Check 10 TSB-102.BADA-A iii 3.7.3.2 Interoperability . 10 3.8 TRUNKED
33、 OPERATION 10 3.9 INCOMING CALLS 11 3.9.1 Direct Inward Dial (DID) . 11 3.9.2 Overdial 11 3.10 GROUP INCOMING CALLS 11 3.10.1 Trunked 11 3.10.2 Conventional 11 3.11 UNANSWERED INCOMING CALLS 11 3.12 GENERAL RFSS FUNCTIONALITY . 11 3.13 ADDITIONAL FEATURES 12 3.14 CALL TERMINATION . 12 3.14.1 Call Cl
34、eared Indication Sent By the RFSS . 12 4 EXAMPLES OF ETINTERFACE ACCESS METHODS . 13 4.1 EXAMPLES OF POSSIBLE ANALOG ACCESS METHODS 13 4.2 EXAMPLES OF POSSIBLE DIGITAL ACCESS METHODS 13 5 FEATURE APPLICABILITY TABLES 13 ANNEX A FEATURE APPLICABILITY TABLES (INFORMATIVE) 14 A.1 SUBSCRIBER UNIT (SU) -
35、 TABLE A.1 . 14 A.2 RFSS - TABLE A.2 . 15 A.3 NOTES TO TABLES A.1 AND A.2 . 15 TABLE OF FIGURES Figure 1 System Model Reference Configuration . 1 TSB-102.BADA-A iv This page intentionally left blank.TSB-102.BADA-A 1 1 INTRODUCTION 1.1 Scope This document gives an overview of telephone voice intercon
36、nect for Land Mobile Radio (LMR) systems. The representative functional network model given in Figure 1 of this document describes a telephone interconnect interface Et, and it is the purpose of this document to describe how telephone service is accessed through the Etinterface by an LMR system. Thi
37、s document only applies to those features of a telephone interconnect service which are necessary for basic telephone functionality. Data Interface Subscriber UnitsNetwork ManagerConsoleSubsystemsFixed SubsystemInterface (FSSI)RF SubSystem (RFSS)Common Air Interface (CAI)(Um and Um2)Inter RF Subsyst
38、emInterface (ISSI)Console Subsystem Interface (CSSI)Network Management InterfaceOther RFSSSubscriber Data Peripheral Interface (e.g. MDP)Telephone Interconnect Interface(A)(Ef) (Ed)(Et)(En)(Ec)(G)Inter-KMF Interface(Future Work Item)Key Management FacilityKey Management Facility(IKI)(A)Data Host Net
39、workKFD-MRKey Fill Device Mobile RadioTelephone NetworkFigure 1 System Model Reference Configuration Note that, in the System Model Reference Configuration shown in Figure 1, only the interfaces are shown. Thus when referring between this overview and Figure 1, no attempt is made to allocate specifi
40、c functionalities to particular elements within the RFSS. Further, this document does not describe the ergonomic interface to radio equipment for telephone interconnect service. Note that features and services for which support is described by this document are not necessarily supported by the telep
41、hone network connected at the Etinterface. Describing these features and services does not predicate their presence in the telephone network being accessed. TSB-102.BADA-A 2 1.2 History and References 1.2.1 Document Revision History Date Document No. Comments May 2, 1996 IS 102.BADA Released as Inte
42、rim Standard March 2000 TIA/EIA-102.BADA Upgrade to full standard 1.2.2 Informative References The following documents are referred to by this document. The versions and dates in these references are the latest available on the date of this document. 102 TIA, APCO Project 25 System and Standards Def
43、inition, TSB102-A, November 1995 AABC TIA, Project 25 Trunking Control Channel Messages, ANSI/TIA-102.AABC-C, November 2009 AABF TIA, Project 25 Link Control Work Formats and Messages, ANSI/TIA-102.AABF-C, March 2011 AABG TIA, Project 25 Conventional Control Messages, TIA-102.AABG, April 2009 BAAA T
44、IA, Project 25 FDMA - Common Air Interface, ANSI/TIA-102.BAAA-A, September 2003 BABA TIA, Project 25 Vocoder Description, ANSI/TIA-102.BABA, December 2003 BABA-1 TIA, Project 25 Half-Rate Vocoder Annex, TIA-102.BABA-1, July 2009 464 TIA, Requirements for Private Branch Exchange (PBX) Switch Equipmen
45、t, TIA/EIA-464-C, October 2002 SIP IETF, SIP: Session Initiation Protocol, RFC 3261, June 2002 SDP IETF, SDP: Session Description Protocol, IETF RFC 4566, July 2006 RTP IETF, RTP: A Transport Protocol for Real-Time Applications, IETF RFC 3550, July 2003 BRI ITU, ISDN Basic User-Network Interface Lay
46、er 1 Specification, I.430, November 1995 PRI ITU, ISDN Primary Rate User-Network Interface Layer 1 Specification, I.431, November 1995 1.3 Terminology The following terminology is used in this document. See 102 for informative descriptions of terminology used throughout the TIA-102 series of documen
47、ts. Composite A radio channel that supports trunking control channel transactions and signaling as well as traffic channel transactions and signaling Conventional Channel A channel in a conventional LMR system Conventional LMR System An LMR system operating in a nontrunked mode Dial/Dialing A teleph
48、one signaling technique generated by rotary dial, keypad or software TSB-102.BADA-A 3 Direct-Inward Dial (DID) The ability to receive digits arriving from the Public Switched Telephone Network (PSTN) or Private Automatic Branch eXchange (PABX) before the Radio Frequency Sub-System (RFSS) provides an
49、swer supervision to the call, and to select one or more users to be alerted DSP Digital Signal Processor DTMF Dual Tone Multi-Frequency signaling Explicit Dialing An over-the-air telephone interconnect request containing the actual numbers to be dialed as selected by a user Group Incoming Call The ability in half duplex and simplex LMR systems for several users to participate in a telephone call Hookflash The ability to generate a “hookflash“ at the Etpoint after a call is in progress. A hookflash is an on-hook condition of between 200 and 800 millis
