Chapter 2 Alarm Troubleshooting

Alarm Procedures

Step 5 If the signal is valid, verify that the power level of the optical signal is within the optical card’s receiver specifications. Refer to the Cisco ONS 15327 Reference Manual for card specifications.

Step 6 If the receiver levels are correct, ensure that the optical transmit and receive fibers are connected properly.

Step 7 If the connectors are correct, complete the “Physically Replace a Card” procedure on page 2-130for the OC-N card.

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

Step 8 If the condition does not clear, log onto http://www.cisco.com/tac for more information or call TAC (1-800-553-2447).

2.6.159 SSM-DUS

Not Alarmed (NA), Non-Service Affecting (NSA)

The Synchronization Status Message (SSM) Quality Changed to Do-Not-Use (DUS) condition occurs when the synchronization status message (SSM) quality level degrades to DUS or is manually changed to DUS.

The signal is often manually changed to DUS to prevent timing loops from occurring. Sending a DUS prevents the timing from being reused in a loop. The DUS signal can also be sent for line maintenance testing.

Note SSM-DUS is an informational condition. It does not require troubleshooting.

2.6.160 SSM-FAIL

Minor (MN), Non-Service Affecting (NSA)

The SSM Failed (SSM-FAIL) alarm occurs when the synchronization status messaging received by the ONS 15327 fails. The problem is external to ONS 15327. The ONS 15327 is set up to receive SSM, but the timing source is not delivering valid SSM messages.

Procedure: Clear the SSM-FAIL Alarm

Step 1 Verify that SSM is enabled on the external timing source.

Step 2 If timing is enabled, use an optical test set to determine that the external timing source is delivering SSM.

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

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

 

Cisco ONS 15327 Troubleshooting Guide, R3.4

2-110

March 2004

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Cisco Systems ONS 15327 manual Ssm-Dus, Ssm-Fail, Procedure Clear the SSM-FAIL Alarm, 110

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.