Chapter 2 Alarm Troubleshooting

Alarm Procedures

Step 6 Complete the “Change a Ring ID Number” procedure on page 2-125.

Step 7 Verify that the ring map is correct.

Step 8 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).

2.6.146 RING-SW-EAST

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

The Ring Switch is Active East Side (RING-SW-EAST) condition occurs when a ring switch occurs at the east side of two-fiber BLSR. The condition clears when the switch is cleared.

Note RING-SW-EAST is an informational condition. It does not require troubleshooting.

2.6.147 RING-SW-WEST

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

The Ring Switch is Active West Side (RING-SW-WEST) condition occurs when a ring switch occurs at the west side of a two-fiber BLSR. The condition clears when the switch is cleared.

Note RING-SW-WEST is an informational condition. It does not require troubleshooting.

2.6.148 SD

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

A Signal Degrade (SD) condition occurs when the quality of the signal is so poor that the bit error rate on the incoming optical line passed the signal degrade threshold. Signal degrade is defined by Telcordia as a soft failure condition. SD and signal fail (SF) both monitor the incoming BER and are similar alarms, but SD is triggered at a lower bit error rate than SF.

The BER threshold on the ONS 15327 is user provisionable and has a range for SD from 10–9to 10–5.

SD-L causes a switch from the working card to the protect card at the line (facility) level. A line or facility level SD condition travels on the B2 byte of the SONET overhead.

The SD condition clears when the BER level falls to one-tenth of the threshold level that triggered the condition. A BER increase is sometimes caused by a physical fiber problem, including a faulty fiber connection, a bend in the fiber that exceeds the permitted bend radius, or a bad fiber splice.

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.

 

Cisco ONS 15327 Troubleshooting Guide, R3.4

2-104

March 2004

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Cisco Systems ONS 15327 manual Ring-Sw-East, Ring-Sw-West, 148 SD, 104

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.