Chapter 1 General Troubleshooting

Identify Points of Failure on a DS-N Circuit Path

1.2.5 Perform a Facility Loopback on a Destination XTC Card

The facility loopback test is performed on the last port in the circuit, in this case the XTC port in the destination node. Completing a successful facility loopback on this port isolates the possibility that the destination node cabling, MIC card, or line interface is responsible for a faulty circuit. Figure 1-11shows an example of a facility loopback on a destination node XTC port.

Figure 1-11 Facility Loopback on a Destination XTC Card

 

ONS 15327

 

ONS 15327

 

 

 

Source

 

Destination

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

XTC

 

 

 

 

 

XTC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MIC

 

 

 

 

OC-N

 

OC-N

 

 

 

 

MIC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DS-N

DS-N

Test Set A

76192

Facility loopback

Caution Performing a loopback on an in-service circuit is allowed but is service-affecting.

Note Loopbacks operate only on ports in the OOS_MT state.

Procedure: Create a Facility Loopback Circuit on a Destination XTC Port

Step 1 Connect an electrical test set to the port you are testing:

a.If you just completed the “Perform a Hairpin on a Destination Node XTC Port” procedure on page 1-14, leave the electrical test set hooked up to the DS-N port in the destination node.

b.If you are starting the current procedure without the electrical test set hooked up to the DS-N port, use appropriate cabling to attach the Tx and Rx terminals of the electrical test set to the DSx panel or the EIA connectors for the port you are testing. Both Tx and Rx connect to the same port.

c.Adjust the test set accordingly.

Step 2 Use CTC to create the facility loopback on the port being tested:

a.In node view, double-click the card where you are performing the loopback.

b.Click the Maintenance > Loopback tabs.

c.Select Facility (Line) from the Loopback Type column for the port being tested. If this is a multiport card, select the row appropriate for the desired port.

d.Click the Apply button.

e.Click the Yes button in the Confirmation Dialog box.

Note It is normal for a LPBKFACILITY condition to appear during loopback setup. The condition clears when you remove the loopback.

Cisco ONS 15327 Troubleshooting Guide, R3.4

1-18

April 2003

 

 

Page 44
Image 44
Cisco Systems ONS 15327 manual Perform a Facility Loopback on a Destination XTC Card

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.