Chapter

Cooling Assembly

Booster Cooling Assembly

The booster cooling assembly is used in racks with more than two Cisco MGX 8220 shelves. It is mounted above the shelves containing the main cooling assembly and below the shelves to which the booster cooling is to be provided. The booster cooling assembly consists of fans that draw air from the shelves below and exhaust air upward through the shelf or shelves above. Each booster supports an additional two Cisco MGX 8220 shelves.

The booster cooling assembly measures

•3.5 inches (2 mounting units) high

•17.45 inches wide

•22 inches deep

Plenum Exhaust Chamber

The plenum exhaust chamber is used in installations where the top of the unit must be enclosed. The plenum chamber is mounted in the rack immediately above the shelf or shelves. The chamber exhausts air from the shelf to the rear of the rack. The plenum chamber is the exhaust option recommended by Cisco Systems.

The exhaust plenum chamber measures

•3.5 inches (2 mounting units) high

•17.45 inches wide

•22 inches deep

Spacer Unit

The spacer unit is an alternative method for exhausting air from the rack and can take the place of the exhaust plenum. The spacer does not support the attachment of a cable management kit. If used, the spacer unit is mounted in the rack immediately above the shelf or shelves.

The spacer unit measures

•1.75 inches (1 mounting unit) high

•17.45 inches wide

•22 inches deep

Cooling Assembly Power

Power is supplied to a connector at the rear of the cooling assemblies by a cable running from the bottom middle rear of the Cisco MGX 8220 shelf.

The assemblies provide output signals to the shelf. Using these signals, the cooling assembly performance can be monitored by the BNM cards. The cable delivering DC power to the cooling assembly from the Cisco MGX 8220 shelf also carries these signals to the BNM using the backplane. The signals are such that the model of cooling assembly can be identified and the speed of each fan can be monitored. Each fan generates a fixed number of square-wave pulses per revolution, allowing the speed of the fan to be determined.

 

Cisco MGX 8220 Installation and Configuration

2-8

Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003

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Cisco Systems MGX 8220 manual Booster Cooling Assembly, Plenum Exhaust Chamber, Spacer Unit, Cooling Assembly Power
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MGX 8220 specifications

The Cisco Systems MGX 8220 is a versatile, high-performance media gateway that has become an integral component in the telecommunications infrastructure. Designed to facilitate the transition from traditional circuit-switched networks to advanced packet-switched environments, the MGX 8220 supports a wide array of voice, video, and data services, making it an essential tool for service providers and enterprises seeking to enhance their network capabilities.

One of the key features of the MGX 8220 is its robust signaling and media processing capabilities. Equipped with support for both Voice over IP (VoIP) and traditional telephony protocols, this gateway enables seamless integration of different communication formats. It boasts a modular architecture, which allows for the addition or removal of various line cards to meet changing demands and technology advancements. This modularity provides operators with the flexibility to scale their services without significant overhauls to their existing infrastructure.

The MGX 8220 is capable of delivering high-density media handling for a multitude of services. With its support for ATM and IP networks, the gateway can handle TDM (Time-Division Multiplexing) to packet voice conversions efficiently. It is designed to optimize network resources by dynamically allocating bandwidth based on traffic requirements, thus ensuring efficient use of network resources and improved performance.

Another significant characteristic of the MGX 8220 is its enhanced quality of service (QoS) features. This capability ensures that voice and video traffic is prioritized appropriately, minimizing latency and jitter while maximizing overall call quality. By employing sophisticated traffic management techniques, the MGX 8220 can deliver a superior user experience, which is critical for any service provider aiming to offer competitive communication solutions.

Furthermore, the gateway includes built-in security features to protect against unauthorized access and ensure the integrity of sensitive data. This includes encryption for voice and video transmission, as well as support for secure signaling protocols.

Overall, the Cisco Systems MGX 8220 stands out as a comprehensive media gateway solution, providing essential functionalities for modern communication needs. Its combination of modularity, high-density processing, effective QoS management, and security features makes it a compelling choice for organizations looking to modernize their telecommunications infrastructure while ensuring reliability and performance. As businesses continue to evolve and demand more from their networks, the MGX 8220 offers a pathway to future-ready communications.
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