User Manual
Table Of Contents
- Trademarks
- About this Manual
- Federal Communications Commission Radio Frequency Interference Statement
- Warranty and Customer Service
- Customer Service, Product Support Information, and Training
- 4205 System Description
- Microwave Path Engineering Basics
- Engineering Guidelines
- Network Turnup Procedure
- User Interface Guide
- Troubleshooting Guide
Section 6, Troubleshooting Guide TRACER 4205 System Manual
54 © 2002 ADTRAN, Inc. 612804205L1-1A
AIS LED
An AIS Alarm, when indicated at the TRACER 4205 by a solid red AIS LED, is generated by the attached
equipment in response to an error condition. The root cause must be determined at the attached equipment.
A typical cause of an AIS alarm is a lack of input to a CSU.
Recommended Actions:
1. Verify the input to any attached data equipment.
RAI LED
A Remote Alarm, when indicated at the TRACER 4205 by a solid Red RAI LED, is generated by the
attached equipment. When the 4205's DS3 interface experiences a LOF or LOS error, the TRACER 4205
will transmit an AIS Alarm to the remote equipment. The remote equipment should respond with a Remote
alarm.
Recommended Actions:
1. Follow the troubleshooting steps for the LOS Alarm, but do so at the attached equipment.
BPV LED
If the BPV LED is ON (solid Red at time of incident), a Bipolar Violation (BPV) has occurred. BPVs
indicate an improper configuration or faulty wiring.
Recommended Actions:
1. Verify the TRACER 4205 unit and the attached equipment are configured for the same line coding
(B3ZS).
2. Verify the cable connections for the DS3 interface are solid.
3. RF ERRORS
RF errors can range anywhere from a non-viable microwave path to loose RF connectors.
Non-viable path conditions could be caused by physical obstructions such as buildings, moutainous terrain,
trees, etc., as well as other physical limitations such as excessive path distances and in-band RF
interference. These types of errors are remedied by performing a detailed line-of-sight microwave path
study to determine whether or not a microwave link is feasible for the terrain and environment under
consideration.
If after performing a microwave path study the system is still not operational, ensure that the antennas are
properly aligned. Note that alignment must be achieved in both elevation and azimuth for optimal link
performance. The TRACER 4205 can be used to aid in antenna alignment by looking at the RSSI
submenu. Optimal antenna alignment will correspond to the maximum number of RSSI bars on the
TRACER 4205 terminal display.
4. STEP-BY-STEP TROUBLESHOOTING
The logical troubleshooting flow presented in this section can be used to set up your TRACER 4205