Specifications

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Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 1 Alarm Troubleshooting
Procedure: Clear the DISCONNECTED Alarm
Step 1 Verify connectivity by pinging the ONS 15454 that is reporting the alarm:
a. If you are using a Microsoft Windows operating system, from the Start Menu choose Programs >
Command Prompt.
b. If you are using a Sun Solaris operating system, from the Common Desktop Environment (CDE)
click the Personal Application tab and click Terminal.
c. For both the Sun and Microsoft operating systems, at the prompt type:
ping [ONS 15454 IP address]
For example,
ping 192.1.0.2.
If the workstation has connectivity to the ONS 15454, it displays a “reply from [IP Address]” after
the ping. If the workstation does not have connectivity, a “Request timed out” message displays.
Step 2 If the ping is successful, an active TCP/IP connection exists. Restart the CTC.
Step 3 If you are unable to establish connectivity, perform standard network/LAN diagnostics. For example,
trace the IP route, check cables, and check any routers between the node and CTC.
1.3.36 EOC
• Major, Non-service affecting
The ONS 15454 has lost its data communications channel (DCC). The DCC is three bytes, D1 through
D3, in the SONET overhead. The bytes convey information about Operation, Administration,
Maintenance, and Provisioning (OAM&P.) The ONS 15454 uses the DCC on the SONET section layer
(SDCC) to communicate network management information.
Warning Invisible laser radiation may be emitted from the aperture ports of the single-mode fiber optic
modules when no cable is connected. Avoid exposure and do not stare into open apertures.
Caution Always use the supplied electrostatic discharge wristband when working with a powered ONS 15454.
Plug the wristband cable into the ESD jack located on the lower-right outside edge of the shelf
assembly.
Procedure: Clear the EOC Alarm on an OC-N Card
Step 1 If an LOS alarm is also reported, first resolve the LOS alarm by following the troubleshooting procedure
given for that alarm.
Step 2 On the node reporting the alarm, check the physical connections from the cards to the fiber- optic cables
that are configured to carry DCC traffic.
Step 3 Verify that both ends of the fiber span have in-service ports by checking that the ACT LED on each OC-N
card is illuminated.