Chapter 2 Alarm Troubleshooting

Alarm Procedures

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.

Note If a circuit shows an incomplete state when this alarm is raised, the logical circuit is in place and will be able to carry traffic when the connection issue is resolved. You do not need to delete the circuit when troubleshooting this alarm.

Procedure: Clear the LOS (OC-N) Alarm

Step 1 Verify fiber continuity to the port.

Step 2 If the cabling is correct, verify that the correct port is in service.

a.Confirm that the OC-N card shows a green LED in CTC or on the physical card: A green LED indicates an active card. An amber LED indicates a standby card.

b.To determine whether the OC-N port is in service, double-click the card in CTC to display the card view.

c.Click the Provisioning > Line tabs.

d.Verify that the State column lists the port as in service (IS).

e.If the State column lists the port as OOS, click the column and choose IS. Click Apply.

Step 3 If the correct port is in service, clean the fiber connectors according to site practice. If no site practice exists, complete the procedure in the Cisco ONS 15327 Procedure Guide.

Step 4 If the alarm does not clear, verify that the power level of the optical signal is within the OC-N card’s receiver specifications. The “Optical Card Transmit and Receive Levels” section on page 1-77lists these specifications for each card.

Step 5 If optical power level is within specifications, use an optical test set to verify that a valid signal exists on the line.

For specific procedures to use the test set equipment, consult the manufacturer. Test the line as close to the receiving card as possible.

Step 6 Repeat Steps 1 through 5 for any other port on the card reporting the alarm.

Step 7 If the alarm does not clear, look for and troubleshoot any other alarm that might identify the source of the problem.

Step 8 If no other alarms exist that might be the source of the LOS, or if clearing an alarm did not clear the LOS (OC-N), complete the “Physically Replace a Card” procedure on page 2-130for the reporting card.

Note When replacing a card with an identical type of card, no additional CTC provisioning is required.

Step 9 If the alarm does not clear, log onto http://www.cisco.com/tac for more information or call TAC to report a service-affecting problem (1-800-553-2447).

Cisco ONS 15327 Troubleshooting Guide, R3.4

 

March 2004

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Cisco Systems ONS 15327 manual Procedure Clear the LOS OC-N Alarm

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.