TIA-689-A-2003 Telecommunications Multiline Terminal Systems PBX and KTS Support of Enhanced 9-1-1 Emergency Calling Service (ANSI Withdrawn 07 24 2015)《加强的9-1-1急救服务呼叫的1PBX和KTS支持》.pdf
《TIA-689-A-2003 Telecommunications Multiline Terminal Systems PBX and KTS Support of Enhanced 9-1-1 Emergency Calling Service (ANSI Withdrawn 07 24 2015)《加强的9-1-1急救服务呼叫的1PBX和KTS支持》.pdf》由会员分享,可在线阅读,更多相关《TIA-689-A-2003 Telecommunications Multiline Terminal Systems PBX and KTS Support of Enhanced 9-1-1 Emergency Calling Service (ANSI Withdrawn 07 24 2015)《加强的9-1-1急救服务呼叫的1PBX和KTS支持》.pdf(34页珍藏版)》请在麦多课文档分享上搜索。
1、 ANSI/TIA-689-A-2003 APPROVED: MARCH 28, 2003 REAFFIRMED: AUGUST 26, 2009 WITHDRAWN: JULY 24, 2015 TIA-689-A (Revision of TIA-689) March 2003Telecommunications Multiline Terminal Systems PBX and KTS Support of Enhanced 9-1-1 Emergency Calling Service NOTICE TIA Engineering Standards and Publications
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20、BLISHED BY TIA WITHOUT SUCH LIMITATIONS. TIA-689-A 1TABLE OF CONTENTS 1 INTRODUCTION5 1.1 Enhanced 911 Emergency Calling Service 5 2 SCOPE.9 3 REFERENCES.10 3.1 Normative References10 3.2 Mandatory and Advisory Requirements . 11 4 DEFINITIONS, ABBREVIATIONS AND ACRONYMS 11 4.1 Definitions 11 4.2 Abb
21、reviations and Acronyms13 5 TECHNICAL REQUIREMENTS 14 5.1 General 14 5.1.1 Dialing 14 5.1.1.1 Three Digit 911 Dialing .14 5.1.1.2 Dial 9 Blocking14 5.1.2 Call Routing 14 5.1.2.1 Automatic Route Selection .14 5.1.2.2 Recognition of Made-Busy Conditions .14 5.1.2.3 Alternate Routing for Out-of-Service
22、 Conditions 15 5.1.2.4 Alternate Routing for Trunk Made-Busy Conditions .15 5.1.2.5 Alternate Routing for Busy, Made-Busy resistors R2 + RL having a value between 400 and 4200 ohms; voltages between 35 and 80 volts; and the polarity switch in either position. 5.2.3.11.6 Signal Levels The analog 911
23、CAMA trunk shall comply with all of the applicable FCC Rules and Regulations in 47 CFR Part 68 Normative Reference 5, section 68.308. In addition, when the analog 911 CAMA trunk is transmitting a MF signal, the maximum MF signal power delivered to a 600-ohm termination shall not exceed -6 dBm. When
24、the analog 911 CAMA trunk is not transmitting a MF signal, the maximum power at any MF frequency, delivered to a 600-ohm termination, shall not exceed -58 dBm. 5.2.3.12 Recognition of Made-Busy Conditions When in the idle condition, the MLTS shall recognize a trunk made-busy signal consisting of rev
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