ADC Telecommunications Inc. DIS190AB Benutzerhandbuch
ADCP-75-132
• Issue 2C • August 2006
Page 48
© 2006, ADC Telecommunications, Inc.
© 2006, ADC Telecommunications, Inc.
6 SYSTEM MAINTENANCE PROCEDURES
This section explains the alarm reporting system, provides a method for isolating and
troubleshooting faults, and provides procedures for replacing the modular transceivers and the
DHU or DEU cooling fans.
troubleshooting faults, and provides procedures for replacing the modular transceivers and the
DHU or DEU cooling fans.
The Digivance ICS requires no regular maintenance to insure continuous and satisfactory
operation. Maintenance, as it applies to the Digivance ICS, primarily involves diagnosing and
correcting service problems as they occur. When an alarm is reported, it will be necessary to
follow a systematic troubleshooting procedure to locate the problem. Once the source of the
problem is isolated, the appropriate corrective action can be taken to restore service. The only
unit components that can be replaced are the cooling fans that mount in the DHU and DEU
and the modular optical transceivers. The failure of any other component within a unit will
require replacement of that unit.
operation. Maintenance, as it applies to the Digivance ICS, primarily involves diagnosing and
correcting service problems as they occur. When an alarm is reported, it will be necessary to
follow a systematic troubleshooting procedure to locate the problem. Once the source of the
problem is isolated, the appropriate corrective action can be taken to restore service. The only
unit components that can be replaced are the cooling fans that mount in the DHU and DEU
and the modular optical transceivers. The failure of any other component within a unit will
require replacement of that unit.
6.1 Tools and Materials
The following tools and materials are required in order to complete the procedures in this
section:
section:
• ESD wrist strap
• IR filtering safety glasses
• Optical loopback device (such as Stratos Lightwave LC5 series) and LC duplex adapter
• Optical power meter
• Magnification device for inspecting LC connectors
• Laser light source
• Multimeter
• Cell phone
• RJ-45 circuit access tool (such as the Harris 8-wire Banjo Adapter)
• Medium and small size flat-bladed screwdrivers
• TORX screwdriver (T10)
• IR filtering safety glasses
• Optical loopback device (such as Stratos Lightwave LC5 series) and LC duplex adapter
• Optical power meter
• Magnification device for inspecting LC connectors
• Laser light source
• Multimeter
• Cell phone
• RJ-45 circuit access tool (such as the Harris 8-wire Banjo Adapter)
• Medium and small size flat-bladed screwdrivers
• TORX screwdriver (T10)
6.2 Fault Detection and Alarm Reporting
Detection of a fault by the Digivance ICS will generate an external alarm response. LED
indicators are provided on the front panel of the various units to indicate when a fault is
detected. In addition to LED indicators, the DHU also provides normally open (NO) and
normally closed (NC) dry alarm contacts for reporting minor and major alarms to an
external alarm system. A minor alarm is defined as a high temperature condition. A major
alarm is defined as any fault condition except high temperature.
indicators are provided on the front panel of the various units to indicate when a fault is
detected. In addition to LED indicators, the DHU also provides normally open (NO) and
normally closed (NC) dry alarm contacts for reporting minor and major alarms to an
external alarm system. A minor alarm is defined as a high temperature condition. A major
alarm is defined as any fault condition except high temperature.
When the DHU alarm contacts are connected to an external alarm system, detection of a fault
will generate an alarm at the Network Operations Center (NOC). However, various types of
faults may not generate an alarm response. In this case, the first indication of a problem will
probably be from cell phone users reporting a loss of service or poor service. Whenever a
problem is reported, whether by a external alarm system or by a call from a user, refer to
Subsection 6.3 to isolate and correct the fault.
will generate an alarm at the Network Operations Center (NOC). However, various types of
faults may not generate an alarm response. In this case, the first indication of a problem will
probably be from cell phone users reporting a loss of service or poor service. Whenever a
problem is reported, whether by a external alarm system or by a call from a user, refer to
Subsection 6.3 to isolate and correct the fault.