
Table of Contents
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DDS Loop Test ......................................................................................................................................... 7-6
Digital Loop Test ...................................................................................................................................... 7-6
V.54 Digital Loop Test.............................................................................................................................. 7-7
Loop 2 and Loop 2 Error Tests ................................................................................................................. 7-8
Service Loops .................................................................................................................................................. 7-9
CSU Loopback Test .................................................................................................................................. 7-9
Non-Latching Loopback Test.................................................................................................................... 7-9
Latching Loopback Test.......................................................................................................................... 7-10
Activating the Tests ....................................................................................................................................... 7-10
Activating Timed Tests ........................................................................................................................... 7-12
Activating Loop Tests ............................................................................................................................. 7-13
Individual Port Testing............................................................................................................................ 7-14
Channel Testing....................................................................................................................................... 7-15
RTN Function ................................................................................................................................................ 7-16
Isolating Network Problems .......................................................................................................................... 7-17
Appendix A - Technical Specifications
Appendix B - ISDN Service Ordering Checklist
Appendix C - Quick Reference Flowchart
Appendix D - Regulatory Information
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