Network Device Installation and User's Guide

About This Chapter
9/24/01 12-1
Chapter 12
Diagnostics &
Troubleshooting
Contents of This Chapter:
12.1 About This Chapter
This chapter provides instructions for performing:
• Self Test Loopbacks.
• Network Loopbacks.
• Disabling external alarms.
• Fault isolation procedures for troubleshooting problems encountered while operating the
Access Bank II - SNMP.
12.2 Diagnostic Switches
The Access Bank II - SNMP System Setup and T1 Span Setup DIP switches on the Control Panel
include settings for running the self test loopbacks, enabling network loopbacks, and enabling alarm
cut-off.
About This Chapter .................................... 1 Disabling an External Alarm ..................... 6
Diagnostic Switches ................................... 1 LED Test and Status Indicators ................ 6
Self Test 1 and 2 ........................................ 2
Fault Isolation Procedures ........................ 8
Self Test Fault Indications ......................... 3 Back Plate Indications .............................. 9
1 kHz Digital Milliwatt Test Signal .............. 4 Voice Channel LED is RED ..................... 9
Network Loopback 1 and 2 ........................ 5 All Voice Channel LEDs flash RED .......... 9
T1 Line or Payload Loopbacks ................... 5 No Ringing During a Self Test ................ 10
ANSI T1.403 Remote T1 LLB .................... 5 Access Bank Shuts Down ...................... 10
Disabling an External Alarm ...................... 6