Chapter 5 Connecting Optical Cables

Testing a Remote Link

Testing a Remote Link

The remote loopback feature of the WCM allows you to test the remote optical communications link without disconnecting the system. You must test the remote link to verify that it meets the specifications to ensure proper operation. Tests may already be available from the supplier of the fiber. If no report is available, perform the tests to verify that parameters are within specifications.

Table 5-1 lists the tests required for the remote link and the equipment required to perform each test.

Table 5-1 Tests and Equipment Required

Tests

Equipment Required

 

 

Optical link loss 1550 nm

• Laser source at 1310 nm and 1550 nm

specified in dBm referenced to

• A power meter or OTDR1

1 mW

 

 

 

Distance specified in km

OTDR

 

 

Optical return loss 1550 nm

Reflectometer

specified in dB

or

 

OTDR with a reflectometer

 

 

1. OTDR = optical time domain reflectometer

To test a remote optical communications link, follow these steps:

Step 1 Disconnect the local lines from the WCMs at both the local and remote systems in the link to be tested.

Step 2 Supply a modulated light to the local receiver of the WCM.

This modulated light switches on the local receiver and the remote transmitter of the local system. The green L/R LED should be on. If the modulated light does not match the clock recovery frequency, assuming a clock recovery is installed and enabled, the Error Indicator LED will be red.

Step 3 Set the remote loopback of the corresponding WCM of the remote system.

The orange loop LED of the WCM in the remote system should be on. The remote receiver, the remote transmitter, and the local transmitter should operate and loopback the received signal to the local system. The R/R, R/T, and L/T LEDs

 

Cisco Metro 1500 Series Hardware Installation Guide

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Cisco Systems 1500 manual Testing a Remote Link, Tests Equipment Required
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1500 specifications

Cisco Systems, a leader in networking and IT solutions, has a long history of providing innovative technologies for businesses of all sizes. One of their notable offerings is the Cisco Systems 1500 series, a robust and flexible networking solution designed to meet the demands of modern enterprises. The Cisco 1500 series is particularly recognized for its capabilities in delivering high-performance routing and switching services, ensuring reliable connectivity across various environments.

One of the main features of the Cisco 1500 series is its ability to operate in diverse environments, including branch offices and remote locations. Backed by Cisco's proprietary software, the 1500 series includes advanced routing protocols that enhance performance while optimizing bandwidth usage. This is crucial for businesses that rely on real-time data transmission for applications like voice over IP (VoIP) and video conferencing.

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Scalability is an essential aspect of the Cisco 1500 series, providing businesses the flexibility to grow without major overhauls of their infrastructure. The ability to support multiple connections and integrate seamlessly with cloud services makes the 1500 series an ideal choice for hybrid environments.

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In summary, the Cisco Systems 1500 series combines high-performance routing, robust security, support for SD-WAN, and scalability to meet the challenges of contemporary networking. As companies increasingly adopt digital transformation strategies, solutions like the Cisco 1500 series are vital for ensuring seamless connectivity, security, and adaptability in an ever-evolving technological landscape.
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