Chapter 2 Alarm Troubleshooting

Alarm Procedures

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).

2.6.138 PWR-B

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

An NE Power Failure at Connector B alarm indicates that the power is out of the specified 48 VDC input range and is either too high (overvoltage) or too low (undervoltage), requiring you to check the incoming power feed or separate power distribution equipment, or both. The PWR-B alarm may also be raised before actual loss of power in a discharging power plant problem and before full loss of incoming power.

Overvoltage or undervoltage can be caused by incoming DC power problems such as power rectifier failure, faulty power cabling, or a blown fuse.

Cisco encourages the use of separate DC power feeds from separate DC power plants or AC power rectifiers to ensure power redundancy to the feeds. Using a single DC power source for both MIC-A/PWR-A and MIC-B/PWR-B creates a risk through the single point of possible failure. Using dual power feeds removes this risk liability.

Warning Hazardous energy level available at the power source and power connection. Do not bridge across battery terminals or bridge battery terminal to ground; metal objects heat up and can cause serious burns or weld the metal object to the terminals.

Procedure: Clear the PWR-B Alarm

Step 1 Determine whether the PWR-B alarm is occurring alone or in conjunction with the PWR-A alarm, and determine whether MIC A and MIC B are using one single or two separate power supplies.

Step 2 If you are using separate power sources for the MIC A and MIC B power connectors and the PWR-B alarm occurs without the PWR-A alarm, inspect the incoming voltage to the MIC B connector using site practices. The alarm can be caused by problems such as power rectifier failure, faulty power cabling, or a blown fuse, and correct these issues. Solve these problems before continuing.

You can verify the power connection continuity and the power source output with a voltmeter using the procedures in the Cisco ONS 15327 Procedure Guide.

Step 3 If you are using a single power source for both the MIC A and MIC B cards and only the PWR-B alarm is occurring, an electrical cable continuity or connection problem may be to blame. Check for these problems and correct them if necessary.

Step 4 If you are using separate power sources for each MIC card and the PWR-B alarm occurs in conjunction with the PWR-A alarm, it is likely that both incoming power feeds or power plants are failing. Check for these problems according to site practice and correct as necessary.

Step 5 If you are using a single power source for both MIC cards and both the PWR-A and PWR-B alarms are raised, problems with both power feeds may be to blame, but a power plant failure is more likely. Check for these problems according to site practice and correct as necessary.

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).

Cisco ONS 15327 Troubleshooting Guide, R3.4

 

March 2004

2-99

 

 

 

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Cisco Systems ONS 15327 manual Pwr-B, Procedure Clear the PWR-B 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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