Chapter 11 Alarm Monitoring and Management

11.6.1 External Alarm Input

11.6.1 External Alarm Input

You can provision each alarm input separately. Provisionable characteristics of external alarm inputs include:

•Alarm type

•Alarm severity (CR, MJ, MN, NA, and NR)

•Alarm-trigger setting (open or closed)

•Virtual wire associated with the alarm

•CTC alarm log description (up to 63 characters)

11.6.2External Control Output

You can provision each alarm output separately. Provisionable characteristics of alarm outputs include:

•Control type

•Trigger type (alarm or virtual wire)

•Description for CTC

•Closure setting (manually or by trigger). If you provision the output closure to be triggered, the following characteristics can be used as triggers:

–Local NE alarm severity—A chosen alarm severity (for example, Major) and any higher-severity alarm (in this case, Critical) causes output closure.

–Remote NE alarm severity—Similar to local NE alarm severity trigger setting, but applies to remote alarms.

–Virtual wire entities—You can provision an alarm that is input to a virtual wire to trigger an external control output.

11.6.3Virtual Wires for External Alarms in Mixed Networks

Virtual wires route external alarms to one or more alarm collection centers in a network. External alarms can be assigned to virtual wires in networks containing only ONS 15600s or in mixed networks containing ONS 15600s, ONS 15454s, and ONS 15327s. You can view virtual wires in the CTC node view Maintenance > Alarm Extenders > Virtual Wires window.

When using virtual wires, you can:

•Assign different external devices to the same virtual wire.

•Assign virtual wires as the trigger type for different external controls.

The ONS 15600 supports 16 virtual wires. The ONS 15454 and ONS 15327 each support four virtual wires. In mixed ONS 15600/15454/15327 networks, CTC displays the virtual wire information differently based upon where it is viewed.

Figure 11-7shows an ONS 15600 Virtual Wires window with a DCC connection to an ONS 15454 node. The Virtual Wires window shows 10 virtual wire columns, but 16 are available. The first 12 are available for other ONS 15600s. Only the last four are available for the ONS 15454, because it can only support four virtual wires.

Cisco ONS 15600 Reference Manual, R7.2

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Cisco Systems ONS 15600 External Alarm Input, External Control Output, Virtual Wires for External Alarms in Mixed Networks
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ONS 15600 specifications

Cisco Systems ONS 15600 is a highly versatile optical networking platform designed to meet the demands of modern telecommunications and data services. This multiservice edge platform supports various transmission mediums and offers a wide array of features that enable efficient data transport. Ideal for service providers and large enterprises, the ONS 15600 is engineered to provide scalable and reliable optical transport solutions.

One of the notable features of the ONS 15600 is its capability to support multiple protocols, including SONET/SDH, Ethernet, OTN, and legacy TDM services. This flexibility allows users to tailor their networks according to specific service requirements while ensuring interoperability with existing infrastructure. The platform is designed to facilitate seamless service migration, accommodating both legacy and next-generation services.

The modular architecture of the ONS 15600 enhances its scalability. It allows for easy expansion by incorporating additional line cards or interface modules without requiring significant downtime. This modularity ensures that service providers can evolve their networks over time, responding to increasing bandwidth demands and new service offerings with ease.

Incorporating advanced technologies, the ONS 15600 employs Dense Wavelength Division Multiplexing (DWDM), significantly increasing the capacity of fiber networks by allowing multiple signals to be transmitted simultaneously over a single optical fiber. This capability helps to optimize fiber utilization and reduce operational costs. In addition, the platform supports Optical Transport Network (OTN) for improved error detection and correction, contributing to higher reliability and performance.

Another key characteristic of the ONS 15600 is its robust management capabilities. The platform can be managed through Cisco's Optical Networking Manager (ONM), providing a centralized interface for network configuration, monitoring, and troubleshooting. This enhances operational efficiency and minimizes downtime, allowing service providers to focus on delivering quality services to their customers.

The ONS 15600 also prioritizes security, offering various features like encryption and access control to safeguard sensitive data during transmission. With its combination of scalability, flexibility, and security, the Cisco ONS 15600 stands out as a reliable choice for organizations looking to enhance their optical networking capabilities while meeting the evolving demands of the digital landscape. Its commitment to quality and performance makes it a cornerstone of modern optical networks.
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