Cisco ONS 15454 Troubleshooting Manual page 318

2.7.163 HITEMP
When you upgrade a node to Software Release 6.0 or later, this enables received optical power PMs for
Note
the OC3-8, OC192-SR, OC192-IR, OC192-ITU, OC-192-XFP, MRC-12, and MRC25G-4 cards. The
newly enabled HI-RXPOWER and LO-RXPOWER alarms require that you initialize a site-accepted
optical power (OPR0) nominal value after the upgrade. (To do this, refer to the procedure in the "Turn
Up a Node" chapter in the Cisco ONS 15454 Procedure Guide.) When you apply the value change, CTC
uses the new OPR0 value to calculate PM percentage values. If you do not change the nominal value, the
HI-RXPOWER or LO-RXPOWER may be raised in response to the unmodified setting.
Clear the HI-RXPOWER Alarm
Find out whether gain (the amplification power) of any amplifiers has been changed. This change also
Step 1
causes channel power to need adjustment.
Step 2 Find out whether channels have been dropped from the fiber. Increasing or decreasing channels can
affect power. If channels have been dropped, the power levels of all channels have to be adjusted.
Note
At the transmit end of the errored circuit, decrease the transmit power level within safe limits.
Step 3
If neither of these problems cause the HI-RXPOWER alarm, there is a slight possibility that another
Step 4
wavelength is drifting on top of the alarmed signal. In this case, the receiver gets signals from two
transmitters at the same time and data alarms would be present. If wavelengths are drifting, the data is
garbled and receive power increases by about +3 dBm.
If the alarm does not clear, add fiber attenuators to the receive ports. Start with low-resistance attenuators
Step 5
and use stronger ones as needed, depending on factors such as the transmission distance, according to
standard practice.
If the alarm does not clear and no faults are present on the other port(s) of the transmit or receive card,
Step 6
use a known-good loopback cable to complete the
Source-Node FC_MR Port" procedure on page 1-94
Step 7 If a port is bad and you need to use all the port bandwidth, complete the
Card" procedure on page
the card at the next available maintenance window.
If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
Step 8
for more information or call Cisco TAC 1 800 553-2447.
2.7.163 HITEMP
The High Temperature alarm occurs when the temperature of the ONS 15454 is above 122 degrees F
(50 degrees C).
Cisco ONS 15454 Troubleshooting Guide, R8.5
2-124
If the card is part of an amplified DWDM system, dropping channels on the fiber affects the
transmission power of each channel more than it would in an unamplified system.
2-273. If the port is bad but you can move the traffic to another port, replace
Default Severity: Critical (CR), Service-Affecting (SA) for NE; Default Severity: Minor (MN),
Non-Service-Affecting (NSA) for EQPT
SONET Logical Objects: EQPT, NE
Chapter 2
"1.6.1 Perform a Facility Loopback on a
and test the loopback.
"Physically Replace a Traffic
Alarm Troubleshooting
November 2009