61200051L1-1D ISU 2x64 Dual Port ISDN Service Unit User Manual iTable of ContentsChapter 1. Understanding ISDN and the ISU 2x64 ...................................................... 1ISDN Overview ..................................................................................................................... 1The ADTRAN ISU 2x64........................................................................................................ 1ISU 2x64 Interoperability ..................................................................................................... 4ISU 2x64 Single Port Operation........................................................................................... 4Recommended Operating Protocols................................................................................... 6Chapter 2. ISDN Service .................................................................................................... 9ISDN Ordering Codes .......................................................................................................... 9Chapter 3. Installation ...................................................................................................... 13Network Connection ......................................................................................................... 13DTE Data Connection ......................................................................................................... 14Maintenance interface......................................................................................................... 15Dial Interface Connection .................................................................................................. 16Chapter 4. Operation ........................................................................................................ 17Menu Navigation ................................................................................................................ 17Front Panel DTE Indicators .......................................................................................... 18VT 100 Menu Support ................................................................................................... 19Getting Started..................................................................................................................... 19Status Buffer.................................................................................................................... 20Status Screen ................................................................................................................... 21Configuration Screen..................................................................................................... 22Chapter 5. Testing ............................................................................................................. 23Test Options ......................................................................................................................... 23Loopback DTE ................................................................................................................ 24Loopback Network ........................................................................................................ 24Loopback Protocol ......................................................................................................... 24Loopback Remote........................................................................................................... 25Test Remote..................................................................................................................... 25Loopback Disable........................................................................................................... 25NEBE/FEBE.................................................................................................................... 26