TIA-464-C-2002 Requirements for Private Branch Exchange (PBX) Switching Equipment (ANSI Withdrawn 05 03 2013)《专用分支交换交换设备的要求》.pdf

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1、 ANSI/TIA-464-C-2002 APPROVED: OCTOBER 29, 2002 WITHDRAWN: MAY 3, 2013 TIA-464-C (Revision of TIA/EIA-464-B) October 2002Telecommunications- Multiline Terminal Systems- Requirements for PBX Switching Equipment NOTICE TIA Engineering Standards and Publications are designed to serve the public interes

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20、464-C Page i TABLE OF CONTENTS 1 INTRODUCTION . 1 1.1 General. 1 1.2 Purpose. 1 1.3 Categories of Performance Criteria . 1 2 SCOPE. 2 2.1 General. 2 2.2 Compliance Reference Point 2 2.3 Compliance Interpretation . 2 2.4 Conformance with Regulatory and Safety Standards 3 2.5 Support of Enhanced 911 C

21、alling 3 3 NORMATIVE AND INFORMATIVE REFERENCES . 4 4 DEFINITIONS. 7 4.1 Digital Switching . 7 4.2 PBX Definitions. 7 4.3 Interface Definitions 7 4.3.1 DAL - Digital Access Line 7 4.3.2 AAL(A) - Analog Access Line (Analog) 7 4.3.3 AAL(D) - Analog Access Line (Digital). 7 4.3.4 ATT - Analog Tie Trunk

22、. 7 4.3.5 DGS - Digital Station 7 4.3.6 ONS - On Premises Station. 7 4.3.7 OPS - Off Premises Station. 8 4.4 Abbreviations and Acronyms. 8 5 INTERFACE REQUIREMENTS 10 5.1 Public Network Access Interface - Analog. 10 5.1.1 Supervision - Ground Start Access Lines 10 5.1.2 Supervision - Loop Start Acce

23、ss Lines . 25 5.1.3 One-Way Direct Inward Dialing (DID) Network Access Interface. 30 5.1.4 System Failure Transfer 44 5.1.5 One-way 911 CAMA Access Interface. 52 5.2 Network Interface - Digital (DS1 and DSX-1) 53 5.2.1 Electrical and Physical Characteristics of the 1.544 Mb/s Interface 53 5.2.2 Sign

24、al Formats for 1.544 Mb/s Facilities 64 5.3 Network Interface - Digital (ISDN) 84 5.3.1 ISDN Primary Rate Access Requirements (DSS1). 84 5.3.2 ISDN Private Network Signaling Requirements (PSS1/QSIG) 84 5.3.3 ISDN Basic Rate U, S and T Reference Points. 87 5.4 Analog Station Interface 88 5.4.1 Genera

25、l 88 5.4.2 Battery Voltage . 88 5.4.3 Ringing 94 5.4.4 Ringing Trip 95 5.4.5 Ringing Pre-trip. 95 5.4.6 Loop Supervision 97 5.4.7 Recognition of Address Signaling 98 5.4.8 Alerting . 98 TIA-464-C Page ii 5.4.9 Voice Path on Answer. 98 5.4.10 Call Supervision 98 6 TRANSMISSION REQUIREMENTS . 100 6.1

26、Preamble. 100 6.1.1 General 100 6.1.2 Requirements for Analog PBXs 100 6.1.3 Requirements for Digital PBXs 100 6.1.4 Measurement Method 101 6.2 Loss Plan 103 6.2.1 Introduction. 103 6.2.2 Insertion Loss Definition 103 6.2.3 Insertion Loss Criteria for PBX 104 6.2.4 PBX Loss Plan Assumptions 106 6.2.

27、5 PBX Loss Ranges and TIA/EIA/IS-968 Requirements. 107 6.3 Loss Parameters . 112 6.3.1 Frequency Response (Attenuation Distortion) 112 6.3.2 Overload of PBXs . 114 6.3.3 Overload Compression 114 6.3.4 Tracking Error. 114 6.4 Echo Control, Return Loss, and Delay 115 6.4.1 Hybrid Balance Requirements

28、115 6.4.2 Hybrid Balance Measurement Technique. 117 6.4.3 Input Impedance Requirements. 119 6.4.4 Input Impedance Measurement Technique . 121 6.4.5 Echo Control Considerations 124 6.4.6 Echo Path Delay 124 6.5 Noise and Distortion Impairments . 125 6.5.1 Idle-Channel Noise 125 6.5.2 Longitudinal Bal

29、ance 127 6.5.3 Crosstalk 136 6.5.4 Quantization Distortion. 138 6.5.5 Single-Frequency Distortion . 138 6.6 Other Impairments . 139 6.6.1 Intermodulation Distortion 139 6.6.2 Envelope Delay . 140 6.6.3 Impulse Noise 140 6.6.4 Jitter. 140 6.6.5 Gain Hit. 140 6.6.6 Phase Hit . 141 6.6.7 Dropout . 141

30、6.6.8 Peak Power to Average Power Ratio (P/AR) 141 6.7 Digital Data Transmission Through The PBX 142 6.7.1 Data Path Characteristics 142 6.7.2 Messages for Call Progress . 143 6.8 Signal Levels 144 7 SIGNALING REQUIREMENTS . 145 7.1 Network Signaling - Analog 145 7.1.1 Definition 145 7.1.2 Criteria

31、for DTMF Signal Processing . 145 7.1.3 Signaling Frequencies . 145 TIA-464-C Page iii 7.1.4 DTMF Generator Characteristics 146 7.1.5 DTMF Receiver Characteristics 147 7.2 Digital Signaling and Supervision . 153 7.2.1 General 153 7.2.2 DID, 911-CAMA, and Tie Trunk Signaling . 154 7.2.3 Loop Start Acc

32、ess Lines (including loop start FX/WATS Trunk) . 162 7.2.4 Ground Start Access Lines (including ground start FX/WATS trunk). 165 7.2.5 Off-Premises Station . 169 7.2.6 Private Line Signaling. 171 7.2.7 Table of Signaling States 172 7.2.8 ESF Signaling Formats 175 7.3 Call Progress Signaling 178 7.3.

33、1 Definition 178 7.3.2 Call Progress Signals Used in PBXs. 178 7.3.3 Call Progress Signals Sent to the PSTN 178 7.3.4 Definitions of Call Progress Signals . 182 7.3.5 Electrical Standards for Call Progress Signals 184 8 APPLICATION NOTES 185 8.1 Proprietary Terminals 185 8.2 REN Scaling. 185 ANNEX A

34、. ANSI/TIA/EIA-464-B LOSS PLAN. 187 A1 Preamble. 187 A1.1 General 187 A1.2 Definitions and Abbreviations 187 A2 Measurement Method Level Translation. 191 A3 Loss Plan 191 A3.1 Insertion Loss Criteria for ISPBX. 191 A3.2 ISPBX Loss Ranges 194 A3.3 Loss Variation. 194 A4 Interface Levels 195 A4.1 Refe

35、rence Signal Power Levels 195 A4.2 Acoustic Reference Levels 196 ANNEX B. TELEPHONY LOSS LEVEL PLANNING - OVERVIEW 200 B1 Introduction 200 B2 Send and Receive Levels . 200 B2.1 Terminal Equipment Loudness Ratings 201 B2.2 Overall Loudness Ratings . 202 B2.3 Optimum Overall Loudness Ratings. 203 B2.4

36、 Desirable Losses versus TIA/EIA/IS-968 Standard 204 B2.5 Network Interface Loudness Ratings 204 B2.6 Port-to-Port Loss Allocation . 206 B2.7 Open Loop Loss and Network Stability 206 B3 Reference Levels 208 B3.1 Zero-Level Point . 208 B3.2 0 dBm0 Definition. 208 B3.3 Digital Milliwatt 208 B3.4 Trans

37、mission Level Translation 208 ANNEX C. LOSS DEFINITIONS 210 ANNEX D. PRIVATE NETWORK SYNCHRONIZATION PLANNING GUIDELINES . 212 TIA-464-C Page iv D1 Hierarchical Synchronization. 212 D2 Overview Of Private Digital Networks 214 D3 Coordination And Design Of Private Digital Network Synchronization Plan

38、s. 214 D3.1 Private Digital Network Owner Responsibilities 214 D3.2 LEC/IEC Responsibilities . 214 D3.3 Vendor Responsibilities 214 D3.4 Engineering Private Digital Network Synchronization Interfaces 215 D3.5 Source of PRS-Traceable References . 216 D3.6 Synchronization Interface Considerations 217

39、D3.7 Intra/lnter Installation Synchronization Source 219 D3.8 Avoidance of Timing Loops . 219 D4 Synchronization Network Operations 221 D4.1 Installation Tests . 222 D4.2 Detection of Network Failures 222 D4.3 Restoration 222 D5 Synchronized Private Network Examples 223 D5.l High Level Concepts. 223

40、 D5.2 Example 1 224 D5.3 Example 2 224 D6 Conclusion . 224 ANNEX E. DIAL PULSE SIGNALING. 225 E1 Foreword 225 E2 Outgoing Dial Pulse Signaling To The Network. 225 E2.1 Network Characteristics 225 E2.2 PBX Characteristics 225 E2.3 Waveform Criteria with Noninductive Termination. 226 E2.4 Waveform Cri

41、teria with Inductive Termination . 226 E2.5 Additional Requirements 227 E3 Incoming Dial Pulse Signaling From Terminal Equipment. 232 E3.1 General 232 E3.2 Loop Characteristics . 232 E3.3 Dial Pulse Detection 232 E4 E e.g., proprietary digital station interfaces. In such systems, the station apparat

42、us must be considered as a whole with the PBX and its associated station wiring, and the overall system must be described in terms of an acoustic (user) to an electrical (network) standard. The requirements in this standard assume a ringer equivalence number (REN) of 5. If the PBX has a REN of less

43、than 5, then the requirements designated by the parenthetical expression (REN) need to be appropriately scaled in accordance with Section 4.7 of the TIA/EIA/IS-968 Standard (Ref 42) 2.2 Compliance Reference Point Compliance with this standard is determined at the PBX interface boundaries and is not

44、to be construed as a constraint on the internal coding or switching techniques of the PBX. 2.3 Compliance Interpretation A PBX complies with this standard when it conforms to the requirements applicable to the interfaces with which it is equipped. For satisfactory service, a PBX should be capable, t

45、hrough the proper selection of equipment options, of satisfying the requirements applicable to its serving area. The requirements for the individual types of PBX interfaces vary between public network carriers and, in some cases, between network switching machines; therefore, multiple options are st

46、ated for satisfying a particular requirement. TIA-464-C Page 3 2.4 Conformance with Regulatory and Safety Standards This standard is intended to be in conformance with Part 68 of the FCC Rules and Regulations (Ref 4), TIA/EIA/IS-968 standard (Ref 42) and with the safety requirements specified in UL

47、60950, Third Edition, Standard for Safety of Information Technology Equipment (Ref 5)1, but it is not limited to the scope of these rules or requirements. If the requirements in either of these documents are more stringent than those contained in this standard, the provisions of those documents appl

48、y. In addition to the requirements in this standard, a PBX is subject to environmental considerations given in ANSI/EIA/TIA-571-A-1998, Telecommunications User Premises Equipment Environmental Considerations (Ref 6). 2.5 Support of Enhanced 911 Calling TIA/EIA-689, PBX and KTS Support of Enhanced 9-

49、1-1 Emergency Service Calling (Ref 36), contains requirements for PBX and KTS support of enhanced 9-1-1 calling. It was developed as a companion document to this standard. It addresses network interface signaling requirements for support of enhanced 911, when a 911 call is dialed. It also addresses station-side support features, such as three-digit 911 dialing and attendant-notification when a 911 call is dialed. The requirements in that document are incorporated here by reference, and should be considered a