
x Access Manager 2000 User Manual
LLB - Line Loopback ............................................................................. 8-41
RLB - Repeater Loopback .....................................................................8-42
ELB - Equipment Loopback .................................................................. 8-43
Procedures for loopbacks ...................................................................................... 8-43
CSU loopback options .......................................................................................... 8-46
Activate Repeater Loopback (RLB) .......................................................8-46
Activate Line Loopback (LLB) ..............................................................8-46
Deactivate Network Loopback (PLB or LLB) .......................................8-47
Send Inband Loop-Up Code To Far End ................................................8-47
Send Inband Loop-Down Code To Far End ...........................................8-47
Activate PLB .......................................................................................... 8-47
Deactivate PLB ....................................................................................... 8-47
Activate EQPT Loopback (ELB) ...........................................................8-47
Deactivate EQPT Loopback (ELB and RLB) ........................................8-47
Activate Framed ALL-ONEs Signal To Network ..................................8-47
Deactivate Framed ALL-ONEs Signal To Network ..............................8-48
Send LLB or PLB Activate Message to Far End (T1.403) ....................8-48
Send LLB or PLB Deactivate Message to Far End (T1.403) .................8-48
Activating/Deactivating DIU loopbacks .......................................................................... 8-48
Loopback descriptions .......................................................................................... 8-48
DIU 2130 and DIU 1130 loopbacks .......................................................8-49
DIU 2140 loopbacks ............................................................................... 8-49
Procedure for loopbacks ....................................................................................... 8-50
Testing CSUs .................................................................................................................... 8-52
Testing DIUs .................................................................................................................... 8-59
Sending a test signal ............................................................................... 8-59
APPENDIX A - Key Acronyms and Terms ...........................................................................A-1
APPENDIX B - Modem Configuration .................................................................................B-1
OSI Protocol Configuration ............................................................................................... B-1
Modem Configuration for OSI Protocol With DTR Lead ..................................... B-1
Modem Configuration for OSI Protocol Without DTR Lead ................................ B-1
Hayes Smartmodem‘ 2400 Configuration ............................................................ B-1
Modem Configuration Commands ........................................................................ B-2
Modem Initialization by CSU or Controller .......................................................... B-2
OSI Compatible Equipment ................................................................................... B-2
TABS Protocol Configuration ........................................................................................... B-5
APPENDIX C - Alarm Report Record Format .......................................................................C-1
Alarm Record Layout ........................................................................................................ C-1
Plain English Alarm Notification ...................................................................................... C-1
Terse Alarm Notification ................................................................................................... C-1
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