Specifications

2-38
Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3
May 2002
Chapter 2 General Troubleshooting
Power and LED Tests
2.6 Power and LED Tests
This section provides the “Power Supply Problems” section on page 2-38, the “Power Consumption for
Node and Cards” section on page 2-39, and the “Lamp Test for Card LEDs” section on page 2-40.
2.6.1 Power Supply Problems
Symptom Loss of power or low voltage resulting in a loss of traffic and causing the LCD clock to reset
to the default date and time.
Table 2-27 describes the potential cause(s) of the symptom and the solution(s).
Caution Operations that interrupt power supply or short the power connections to the ONS 15454 SDH are
service-affecting.
Warning When working with live power, always use proper tools and eye protection.
STM16 SH 1310 -8 to -28 dBm +3 to -2 dBm
STM16 LH 1550 -8 to -28 dBm +3 to -2 dBm
STM16 EH 100GHz -8 to -28 dBm 0 to -2 dBm
STM64 LH 1550 -9 to -17 dBm +10 to +7 dBm
Table 2-26 Optical Card Transmit and Receive Levels (continued)
Optical card Rx Tx
Table 2-27 Power Supply Problems
Possible Problem Solution
Loss of power or low
voltage.
The ONS 15454 SDH requires a constant source of DC power to properly
function. Input power is -48 VDC. Power requirements range from -42 VDC
to -57 VDC.
A newly installed ONS 15454 SDH that is not properly connected to its
power supply will not operate. Power problems can be confined to a specific
ONS 15454 SDH or affect several pieces of equipment on the site.
A loss of power or low voltage can result in a loss of traffic and causes the
LCD clock on the ONS 15454 SDH to default to January 1, 1970, 00:04:15.
For clock reset instructions, refer to the Cisco ONS 15454 SDH Installation
and Operations Guide.
Refer to the “Isolate the Cause of Power Supply Problems” section on
page 2-39.
Improperly connected
power supply.