Chapter 2 Description

Fan Trays

The MGX 8240 incorporates three fan trays. Each fan tray:

Is a self-contained card installed from the front of the shelf.

Contains three fans.

Is hot-swappable for ease of servicing.

Has a bi-colored LED to show Ready (green) and Fault (red).

Any two of the three fan trays are sufficient to cool a fully-loaded chassis. Each fan has a tachometer output. These nine outputs are bused to each of the 15 PSM card slots.

During configuration, the installer should configure at least one PSM card to monitor and report fan status. All other PSM cards have this feature disabled as the default.

Upon detection of any fan failure, the PSM performs the following:

Sets a major alarm.

Sets the fan tray LED state to Fault on the fan tray containing the failed fan.

Note If a fan tray fails, leave it in place until a replacement unit is available. The chassis can runo n two fan trays, but when a fan tray is removed, all three fans on the tray appear to fail. This condition generates fan failure alarms.

Air Intake and Filtering

The shelf is equipped with a removable reusable air filter. Air intake is from the front and from the sides to maximize the intake air volume. Figure 2-4represents the front and side air intakes.

Cisco MGX 8240 Hardware User’s Guide

Release 3.0, Part Number 78-10728-01, July 2000

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Cisco Systems MGX 8240 manual Air Intake and Filtering, Fan Trays

MGX 8240 specifications

The Cisco MGX 8240 is an advanced multiservice switch designed to provide integrated voice, video, and data services. As part of Cisco's MGX series, the MGX 8240 is engineered to enhance network scalability and efficiency, making it an ideal choice for service providers and large enterprises seeking to deploy next-generation internetworking solutions.

One of the standout features of the Cisco MGX 8240 is its support for high-density media gateways. This capability enables the seamless integration of multiple voice channels while effectively managing the demands of data and video traffic. With support for various voice protocols, including Voice over IP (VoIP), the MGX 8240 plays a crucial role in transitioning traditional telecommunications infrastructure to more modern, converged networks.

A key technology incorporated into the MGX 8240 is the capability for call control and signaling through Session Initiation Protocol (SIP) and H.323. This flexibility allows service providers to offer a range of services, such as Unified Communications and enhanced multimedia applications. The MGX 8240 also includes built-in Quality of Service (QoS) features, ensuring that critical applications receive the bandwidth and latency they require for optimal performance.

From a hardware perspective, the MGX 8240 is designed with modularity and redundancy in mind. Featuring a chassis that can accommodate multiple service modules, this switch allows organizations to scale their network as demand grows. Its hot-swappable design means that network administrators can replace components without causing downtime, thereby ensuring continuous service availability.

The Cisco MGX 8240 also includes various management features, such as Cisco Network Management, which simplifies network oversight and facilitates troubleshooting. Furthermore, the device can be integrated into larger network management frameworks, allowing for comprehensive monitoring and administrative control.

Security is another critical characteristic of the MGX 8240. It supports various security protocols to protect data integrity and prevent unauthorized access, making it suitable for deployments in sensitive environments.

In summary, the Cisco MGX 8240 is a versatile multiservice switch that delivers high-performance capabilities for voice, video, and data services. With its extensive feature set, modular design, and robust security mechanisms, it stands as a reliable choice for organizations looking to future-proof their network infrastructure in an increasingly interconnected world.