Chapter 2 Alarm Troubleshooting

Alarm Procedures

Note The fan-tray assembly should run immediately when correctly inserted.

Step 6 If the fan does not run or the alarm persists, complete the “Replace the Fan-Tray Assembly” procedure on page 3-1.

Step 7 If the replacement fan-tray assembly does not operate correctly, log onto http://www.cisco.com/tac for more information or call TAC to report a service-affecting problem (1-800-553-2447) if the alarm applies to the NE, or a non-service-affecting problem if the alarm applies to equipment.

2.6.94HLDOVRSYNC

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

The Holdover Synchronization Mode (HLDOVRSYNC) alarm indicates a loss of the primary or secondary timing reference. Timing reference loss occurs when line coding (AMI, B8ZS) on the timing input is different from the configuration on the ONS 15327. It also usually occurs during the selection of a new node reference clock. The HLDOVRSYNC alarm indicates that the ONS 15327 has gone into holdover and is using the ONS 15327 internal reference clock, which is a Stratum 3-level timing device. The alarm clears when primary or secondary timing is reestablished.

Procedure: Clear the HLDOVRSYNC Alarm

Step 1 Clear additional alarms that relate to timing, such as a FRNGSYNC condition (see page 2-71); a FSTSYNC condition (see page 2-71); a HLDOVRSYNC alarm (see page 2-73); an LOF (BITS) alarm (see page 2-77); an LOS (BITS) alarm (see page 2-81); a MANSWTOINT condition (see page 2-89); a MANSWTOPRI condition (see page 2-89); a MANSWTOSEC condition (see page 2-89); a MANSWTOTHIRD condition (see page 2-89); a SWTOPRI condition (see page 2-115); a SWTOSEC condition (see page 2-115); a SWTOTHIRD condition (see page 2-115); a SYNC-FREQ condition (see page 2-116); a SYNCPRI alarm (see page 2-117); a SYNCSEC alarm (see page 2-117); or a SYNCTHIRD alarm (see page 2-118).

Step 2 Reestablish a primary and secondary timing source according to local site practice.

Step 3 If the alarm does not clear, log onto http://www.cisco.com/tac for more information or call TAC to report

aservice-affecting problem (1-800-553-2447).

2.6.95IMPROPRMVL

•Critical (CR), Service Affecting (SA)

The Improper Removal (IMPROPRMVL) alarm occurs when a card is physically removed from its slot before it is deleted from CTC. The card does not need to be in service to cause the IMPROPRMVL alarm; it only needs to be recognized by CTC. The alarm does not appear if you delete the card from CTC before you physically remove the card from the node.

Caution Updating software on a standby XCT card can take up to 30 minutes.

Cisco ONS 15327 Troubleshooting Guide, R3.4

 

March 2004

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Cisco Systems ONS 15327 manual Improprmvl, Procedure Clear the Hldovrsync Alarm
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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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