3Com PLM Series, NCG-PLM manual Avoiding Single Point of Failure SPF Issues, SPF Overview

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4 Avoiding Single Point of Failure (SPF) Issues

4.1 SPF Overview

Critical network configurations (such as those trans- porting audio signals) should avoid “Single Point of Failure” (SPF) scenarios to the greatest extent possible. SPF failures can occur when a network has been designed in such a way that failure of a single part of the network can cause the entire network to fail or cease operation. A network that has not been designed with the appropriate fail-safe measures to avoid SPF issues can suffer a breakdown in the transport of audio and control data, resulting in the worst case scenario for any professional sound engineer: dead silence.

The use of redundant network and audio cabling and switches, as well as the careful selection of the proper network topology for your application, are effective tools in avoiding SPF issues.

The PLM Series has been designed with special features to help prevent this type of system-wide network breakdown. These include:

•Auto input priority switching (managing multiple signal sources)

•Support for redundant device sources (e.g. the same device providing both analog and AES sources simultaneously to the network)

•Support for redundant network paths (via redun- dant rear panel Ethernet ports on the PLM)

4.2Automatic Priority Input Switching

The user-selectable automatic input priority switching feature in the DLC PLM Edition software is located on the I/O Config tab of the Input Configuration page (see figure 4.1). Four levels of input priority are of- fered, each of which can consist of Analog, AES 1, AES 2, and Dante. In the event of a loss of signal to the first priority input, the system will instantly switch to the next designated priority input and restore audio connectivity to the system.

Full information on how to select user input priorities is contained in section 9.12.3.1 of the PLM Series Operation Manual.

Figure 4.1: Priority input settings are located in the Input Configuration page

6PLM Series Network Configuration Guide

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Contents Network Configuration Guide CONTENTs PC Configuration OverviewEthernet Fundamentals Introduction Dante Audio Network PLM Series and Dante Networking FeaturesNetworking Overview Rear Panel ConnectionsAvoiding Single Point of Failure SPF Issues Automatic Priority Input SwitchingSPF Overview Signal type redundancy Signal source redundancy Network Port RedundancyPLM Series Topology Overview Network Connections and TopologiesPLM Series Network Cabling Daisy-chained devicesDaisy-chained switches Daisy-chained switch ringStar or Hub-and-Spoke networks Dual daisy-chained switches Ethernet Cabling LimitationsOther combination networks PLM / Dante Network Size Limitations Stage RightMultiple access points, single Ssid Improving Wireless AccessibilityWireless Network Topologies Primary and Secondary PCNetwork Hardware Recommendations Network switches / routers LinkSys SRW224G4Recommended wireless access point LinkSys WAP200 General RecommendationsLinkSys WAP200 Recommended network connectors LEMO-type multipin connectorLemo connectors Recommended network cabling Belden 1305AReferences and Definitions Contact Plmsupport@labgruppen.com Info@labgruppen.comW . l a b g r u p p e n . c o m

NCG-PLM, PLM Series specifications

The 3Com NCG-PLM, PLM Series is a notable product line from 3Com Corporation designed to enhance network management and provide a robust infrastructure for businesses. This series is centered around providing seamless connectivity and efficient network performance while supporting a variety of applications and services.

One of the main features of the PLM Series is its advanced network management capabilities. The series offers a comprehensive suite of management tools that facilitate easy monitoring and configuration of network devices. This enables IT administrators to gain visibility into network performance, troubleshoot issues, and manage bandwidth effectively. The user-friendly interface simplifies these processes, allowing for quick adjustments and ensuring optimal functionality.

The PLM Series integrates cutting-edge technologies to support high-speed connectivity and data transfer. With support for Gigabit Ethernet, the series ensures that data can be transferred rapidly across networks, meeting the growing demands of modern applications and user expectations. Such speed is crucial for businesses that rely on data-intensive applications, video conferencing, and cloud services.

Furthermore, one of the hallmark characteristics of the 3Com NCG-PLM Series is its reliability and scalability. Designed to accommodate increasing network demands, the devices within this series can easily expand to support additional users and devices. This scalability ensures that organizations can grow without the need for extensive overhauls of their existing infrastructure.

Security is another paramount feature of the PLM Series. It employs various security protocols to protect sensitive data and maintain the integrity of the network. This includes measures against unauthorized access, ensuring that only authenticated devices and users can connect to the network. This commitment to security is critical in today’s climate where cyber threats are ever-evolving.

The PLM Series is also designed with energy efficiency in mind. The devices consume less power without compromising performance, thereby supporting sustainability initiatives within organizations. This energy-efficient design can result in significant cost savings on power consumption over time.

In summary, the 3Com NCG-PLM, PLM Series stands out for its advanced network management tools, high-speed connectivity, reliability, scalability, strong security measures, and energy efficiency. These attributes make it an ideal choice for businesses seeking to optimize their network infrastructure and cope with the increasing demands of modern digital operations.
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