Chapter 2 Alarm Troubleshooting

Alarm Procedures

Step 5 If the secondary timing source is an incoming port on the ONS 15327, complete the “Clear the LOS (OC-N) Alarm” procedure on page 2-85.

Step 6 If the alarm does not clear, log onto http://www.cisco.com/tac for more information or call TAC (1-800-553-2447).

2.6.180 SYNCTHIRD

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

A Loss of Timing on Third Reference (SYNCTHIRD) alarm occurs when the ONS 15327 loses the third timing source (reference 3). The ONS 15327 uses three ranking timing references. The timing references are typically two BITS-level or line-level sources and an internal reference. If SYNCTHIRD occurs and the ONS 15327 uses an internal reference for source three, the XTC card might have failed. The ONS 15327 often reports either a FRNGSYNC condition (see page 2-71)or a HLDOVRSYNC alarm (see page 2-73)after a SYNCTHIRD alarm.

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.

Procedure: Clear the SYNCTHIRD Alarm

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

Step 2 Verify the current configuration of the REF-3 for the NE Reference. For more information about references, refer to the Cisco ONS 15327 Procedure Guide.

Step 3 If the third timing source is a BITS input, complete the “Clear the LOS (BITS) Alarm” procedure on page 2-82.

Step 4 If the third timing source is an incoming port on the ONS 15327, complete the “Clear the LOS (OC-N) Alarm” procedure on page 2-85.

Step 5 If the third timing source uses the internal ONS 15327 timing, complete the “Reset the Active XTC Card in CTC” procedure on page 2-129.

Verify that the active card you reset is now standby. The ACT/STBY LED of this card should be amber, and the newly active XTC card LED should be green.

Step 6 If the reset card has not rebooted successfully, or the alarm has not cleared, call TAC (1-800-553-2447). If the TAC technician tells you to reseat the card, complete “Remove and Reinsert (Reseat) the Standby XTC” procedure on page 3-3. If the TAC technician tells you to remove the card and reinstall a new one, follow the “Physically Replace a Card” procedure on page 2-130.

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

 

Cisco ONS 15327 Troubleshooting Guide, R3.4

2-118

March 2004

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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.
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