Chapter 2 Alarm Troubleshooting

Alarm Procedures

•If you are looking at the node view of the ONS 15327, an amber LED depiction with “Sby” has replaced the white “LDG” depiction on the card in CTC.

Step 5 If the alarm does not clear, log onto http://www.cisco.com/tac for more information or call TAC (1-800-553-2447).

2.6.133 PLM-P

•Critical (CR), Service Affecting (SA)

A Payload Label Mismatch Path (PLM-P) alarm indicates that signal does not match its label. The condition occurs due to an invalid C2 byte value in the SONET path overhead.

For example, this alarm can occur when a card is expecting a 0 value in the C2 byte, but receives a 4 instead. This can occur on the XTC card when the card expects a DS-1 signal but receives a DS-3 signal. The DS-3 signal C2 byte value is 4, so this will cause a label mismatch and a PLM-P alarm.

Warning Invisible laser radiation might be emitted from the end of the unterminated fiber cable or connector. Do not stare into the beam directly with optical instruments. Viewing the laser output with certain optical instruments (for example, eye loupes, magnifiers, and microscopes) within a distance of 100

mmmight pose an eye hazard. Use of controls or adjustments or performance of procedures other than those specified might result in hazardous radiation exposure.

Caution Always use the supplied electrostatic discharge wristband when working with a powered ONS 15327. Plug the wristband cable into the ESD jack located between the top high-speed and XTC slots.

Procedure: Clear the PLM-P Alarm

Step 1 Verify that all circuits terminating in the reporting card are active:

a.Click the Circuits tab.

b.Verify that the State column lists the port as active.

c.If the State column lists the port as incomplete, wait up to ten minutes for the ONS 15327 to initialize fully. If the incomplete state does not change after full initialization, log onto http://www.cisco.com/tac for more information or call TAC to report a service-affecting problem (1-800-553-2447).

Step 2 After determining the port is active, verify the signal source to the traffic card reporting the alarm with an optical test set according to site specific practice.

For specific procedures to use the test set equipment, consult the manufacturer.

Step 3 If traffic is being affected, complete the “Delete a Circuit” procedure on page 2-128.

Caution Deleting a circuit might affect traffic.

Step 4 Recreate the circuit with the correct circuit size. Refer to the Cisco ONS 15327 Procedure Guide for detailed procedures to create circuits.

Cisco ONS 15327 Troubleshooting Guide, R3.4

 

March 2004

2-95

 

 

 

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Cisco Systems ONS 15327 manual Plm-P, Procedure Clear the PLM-P Alarm
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ONS 15327 specifications

Cisco Systems ONS 15327 is a high-performance optical networking solution tailored for service providers and enterprises looking to enhance their optical communication infrastructure. This versatile platform is recognized for its robust performance, scalability, and flexibility, making it suitable for a wide array of applications ranging from broadband access to metropolitan area networking.

One of the standout features of the ONS 15327 is its ability to handle multiple data types over a single platform. It supports a rich array of protocols, including Ethernet and SONET/SDH, allowing service providers to deliver a diverse portfolio of services to their customers. This multiservice capability simplifies the network architecture, reducing operational complexity and costs.

The ONS 15327 is designed with a modular architecture, which enables operators to customize and scale their network as demand grows. It supports a variety of card options for different media types, wavelengths, and capacity requirements. This modularity not only facilitates straightforward upgrades but also allows for efficient network management.

In terms of technology, the ONS 15327 leverages dense wavelength division multiplexing (DWDM) capabilities to maximize the utilization of available fiber bandwidth. This allows for an impressive increase in transmission capacity without the need for additional fiber installations, making it a cost-effective solution for expanding networks.

Another significant characteristic of the Cisco ONS 15327 is its advanced performance monitoring and management features. Built-in diagnostic tools provide real-time visibility into network performance, enabling prompt identification and troubleshooting of potential issues. This proactive approach to network management enhances service reliability and customer satisfaction.

Security is also paramount in the ONS 15327. The platform integrates various security features and protocols to protect the data traversing the network, ensuring compliance with industry standards and safeguarding sensitive information.

Furthermore, the equipment is designed for easy integration into existing infrastructures. Its compatibility with Cisco’s broader networking solutions allows for seamless interconnection with routers, switches, and other devices, facilitating comprehensive network solutions.

In conclusion, Cisco Systems ONS 15327 stands out as a powerful optical networking platform that combines versatility, scalability, and advanced management features. Its ability to support various protocols and harness optical technologies makes it an essential tool for organizations aiming to optimize their telecommunications infrastructure while minimizing costs and complexity.
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