ADTRAN 6000 Series system manual Rf Low Led, T1 Interface Alarms

TRACER 6000 Series Integrated System Manual Section 8 Troubleshooting Guide

RF LOW LED

If the RF LOW LED is ON (solid red), the received signal is approaching 0 V of RSSI. This condition is typically indicative of a path or installation problem.

Recommended Actions:

1.Verify the far-end transmitter power setting is the value that the link planning budget allows.

2.Check all coaxial cable connectors for solid connections. Check for water and corrosion around any of the connectors. If water is apparent in the coaxial connectors, replace the coaxial cable and the connectors, making sure to properly weatherproof the replacements.

3.Verify the RF signal path by verifying the antenna alignment.

4.Check the integrity of lightning arrestors.

T1 Interface Alarms

All active T1 alarms are displayed in the T1X STATUS/CONFIGURATION/LOOPBACK menu page.To identify the T1 interface in alarm and the specific alarm present, display the T1(X) STATUS screens and check the T1(X)

INTERFACE ALARMS field.

Recommended Actions:

1.Display the T1(X) STATUS screen and check the T1(X) INTERFACE ALARM field to identify the active alarm.

2.Follow the steps below for the appropriate alarm.

LOS Alarm or Red Alarm

LOS ALARM and RED ALARM are indications that the TRACER 64x0 may be unable to detect a viable T1 received signal from the connected T1 equipment. This error may be due to a degraded signal or no signal, or may be caused by improper framing.

Recommended Actions:

1.Verify that the T1 cable is connected to the T1 interface on the TRACER 64x0.

2.Verify the connections at the opposite end of the T1 cable.

3.Verify that the framing mode (D4 or ESF) is the same for both the TRACER 64x0 and the T1 equipment.

Yellow Alarm

A Yellow Alarm is generated by the attached equipment. When the attached equipment’s T1 interface is in Red Alarm, the TRACER 64x0 generates a Yellow Alarm.

Recommended Actions:

1. Follow the troubleshooting steps for Red Alarm, but do so at the attached equipment.

Blue Alarm

A remote alarm (alarm indication signal or AIS) is generated by the attached equipment. The root cause must be determined at the attached equipment. A typical cause of a blue alarm is a lack of input to a CSU.

Recommended Actions:

1. Verify the input to any attached data equipment.

612806420L1-1F Copyright © 2005 ADTRAN, Inc. 127