Chapter 2 Alarm Troubleshooting

2.7.233 SYNCSEC

A Loss of Timing on Primary Reference alarm occurs when the ONS 15310-CL or ONS 15310-MA loses the primary timing source (reference 1). The system uses three ranked timing references. The timing references are typically two BITS-level or line-level sources and an internal reference. If SYNCPRI occurs, the system should switch to its secondary timing source (reference 2). Switching to a secondary timing source also triggers the “SWTOSEC” alarm on page 2-134.

Clear the SYNCPRI Alarm

Step 1 In node view, click the Provisioning > Timing > General tabs.

Step 2 Verify the current configuration for REF-1 of the NE Reference.

Step 3 If the primary timing reference is a BITS input, complete the “Clear the LOS (BITS) Alarm” procedure on page 2-93.

Step 4 If the primary reference clock is an incoming port on the ONS 15310-CL or ONS 15310-MA, complete the “Clear the LOS (OCN) Alarm” procedure on page 2-99.

Step 5 If the condition does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport for more information or call Cisco TAC (1-800-553-2447).

2.7.233 SYNCSEC

Default Severity: Minor (MN), Non-Service-Affecting (NSA)

SONET Logical Objects: EXT-SREF, NE-SREF

A Loss of Timing on Secondary Reference alarm occurs when the ONS 15310-CL or ONS 15310-MA loses a secondary timing source (reference 2). If SYNCSEC occurs, the system should switch to a third timing source (reference 3) to obtain valid timing. Switching to a third timing source also triggers the “SWTOTHIRD” alarm on page 2-135.

Clear the SYNCSEC Alarm

Step 1 In node view, click the Provisioning > Timing > General tabs.

Step 2 Verify the current configuration of REF-2 for the NE Reference.

Step 3 If the second reference is a BITS input, complete the “Clear the LOS (BITS) Alarm” procedure on page 2-93.

Step 4 Verify that the BITS clock is operating properly.

Step 5 If the secondary timing source is an incoming port on the ONS 15310-CL or ONS 15310-MA, complete the “Clear the LOS (OCN) Alarm” procedure on page 2-99.

Step 6 If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport for more information or call Cisco TAC (1-800-553-2447).

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ONS 15310-CL, ONS 15310-MA specifications

Cisco Systems has long been a leader in networking and telecommunications technology, and among its impressive lineup of products, the Cisco ONS 15310 series stands out as an essential solution for optical networking. This series includes models such as the ONS 15310-MA, ONS 15310-CL, and ONS 15310-CA, each designed to meet the diverse needs of service providers and enterprises seeking to enhance their optical transport networks.

The Cisco ONS 15310-MA is an advanced multi-service platform designed for metropolitan area networks. It facilitates the seamless transport of data, voice, and video over optical networks. One of its main features is its ability to support a variety of interfaces, including Ethernet, SONET/SDH, and Wavelength Division Multiplexing (WDM), allowing users to integrate multiple services into a single platform. Additionally, the ONS 15310-MA supports advanced traffic management and Quality of Service (QoS) features to prioritize critical applications and ensure consistent performance.

The ONS 15310-CL variant is tailored for more specific applications, providing enhanced capabilities aimed at delivering carrier-grade services. It features a robust architecture that accommodates high-capacity traffic without compromising reliability. This model emphasizes low power consumption and a compact design, making it suitable for deployment in space-constrained environments. The ONS 15310-CL also supports a wide range of optical interfaces, making it highly flexible for various network configurations.

In terms of technologies, the Cisco ONS 15310 series leverages Optical Transport Network (OTN) capabilities, providing high efficiency and greater bandwidth utilization. OTN technology enables efficient error correction and adds resilience to the network through its built-in protection mechanisms. Furthermore, the series supports seamless integration with existing IP/MPLS networks, creating a cohesive infrastructure as organizations evolve their networking requirements.

One of the defining characteristics of the ONS 15310 series is its focus on scalability. Network operators can start with a modest deployment and gradually expand capacity as demand grows. This adaptability is complemented by Cisco's comprehensive management and monitoring tools, providing operators with real-time insights into network performance and facilitating proactive management.

In conclusion, the Cisco ONS 15310-MA and ONS 15310-CL models represent sophisticated solutions for modern optical networks. With their versatile features, advanced technologies, and robust design, they empower service providers and enterprises to build resilient, high-capacity networks that meet the demands of today’s data-driven world.
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