D. McKinnon, ast technology Labs, Inc. (To be ansi/tia-571-B) Telecommunications Telephone Terminal Equipment Environmental Considerations



Download 202.91 Kb.
Page1/7
Date conversion14.08.2017
Size202.91 Kb.
  1   2   3   4   5   6   7
PN-3-3283RV2

TR41.7-02-11-006

Working Draft 00 – Initial Distribution

D. McKinnon, AST Technology Labs, Inc.

(To be ANSI/TIA-571-B)

Telecommunications

Telephone Terminal Equipment

Environmental Considerations

Formulated under the cognizance of TIA Subcommittee TR-41.7, Environmental and Safety Considerations

With the approval of TIA Engineering Committee TR-41, User Premises Telecommunications Equipment Requirements

The TR-41.7.x Working Group acknowledges the contributions made by the following individuals in the development of this standard.



Name

Representing

Position (If Applicable)







Chair







Editor










The TR-41.7.x Working Group, which had the technical responsibility during the development of this standard, had the following participating members.

Name

Representing





























































































































































































































































TABLE OF CONTENTS

1. INTRODUCTION iii

2. SCOPE iv

3. DEFINITIONS v

3.1. Earth (Ground) v

3.2. Exposed Surfaces v

3.3. Grounding Conductor v

3.4. Network Interface or Demarcation Point v

3.5. Normal Operation v

3.6. Outside Plant Interface Leads (OP) v

3.7. Temperature Stabilization v



4. TECHNICAL REQUIREMENTS vii

4.1. GENERAL vii

4.2. PHYSICAL ENVIRONMENT viii

4.3. ELECTRICAL ENVIRONMENT xii

ANNEX A (Normative) REFERENCES xxv

ANNEX B (Informative) RATIONALE FOR TELEPHONE LINE OVERVOLTAGE TESTS (4.3.2.3) xxvi

B1. Sources of Overvoltage xxvi

B2. Analysis of Limiting Overvoltage Conditions xxvi

B3. Performance of Telecommunications User Premises Equipment xxvi

B4. 2-Line and 4-Wire Circuits xxvii

B5. Multiple Sets xxvii

B6. Wiring Simulation xxvii

B7. Primary Protector Coordination xxviii

B8. Test Points xxviii

B9. Test Conditions xxviii

B10. Failure Conditions xxviii

ANNEX C (Informative) RATIONALE FOR SURGES (4.3.3) xxix

C1. Sources of surges xxix

C2. Traditional telecom surge specification xxix

C3. Surge types xxix

C4. Open circuit voltage and voltage waveshape xxx

C5. Short circuit current and current waveshape xxxi

C6. Surge studies and data xxxi

C7. Standards on surges xxxii

C8. Surge likelihood xxxiii

C9. Surges for telecommunications equipment xxxiii



ANNEX D (Informative) GROUNDING PRACTICES xxxiv



Table of Figures

Figure 1 – PBX with Interfaces vi

Figure 2 – Surge Generators xv

Figure 3 – Application of Surge Generators xvi



Table of Tables

Table 1 – Range of Temperature & Relative Humidity xi

Table 2 – Input Voltage Characteristics xii

Table 3 – Lightning type abbreviations xv

Table 4 – High Voltage Surges xviii

Table 5 – ESD Discharge voltages and methods xx

Table 6 – Test voltage vs. altitude multipliers xxii

Table 7 – ESD response mode distribution xxiii


  1   2   3   4   5   6   7


The database is protected by copyright ©ininet.org 2016
send message

    Main page