Chapter

Site Preparation

Site Preparation

Site preparation involves rack space, power, and cooling considerations.

Rack Space

The MGX 8220 shelf is designed for mounting in a standard 19-inch rack. The MGX 8220 site requires a 19-inch rack with sufficient available mounting units for the modules to be installed.

•5U for each shelf

•3U for the main cooling assembly

•2U for the booster cooling assembly

•2U for the plenum chamber

•1U for the spacer unit

•3U for the AC power module

The rack should have a set of mounting rails at the front and a second set at the rear or in a designated intermediate position. There must be sufficient clearance around the rack to allow removal and replacement of front and back cards and for the attachment and routing of cables to the line modules. Ideally, there should be at least three feet clearance in the front of the rack and two feet clearance in the back of the rack.

Power

The MGX 8220 shelf can be configured for either AC or DC power.

An easily accessible AC or DC power source must be available within six feet of the MGX 8220 system. Before powering up the node, verify that the MGX 8220 node is powered from a dedicated branch circuit. An easily accessible disconnect device should be included in the facility wiring.

•DC Version

For the DC version, a 48V DC power feed is required. For power supply redundancy, two such power feeds (preferably from independent power sources) are required. Each power feed must be capable of supplying 500W.

A 20A DC circuit breaker is recommended for the 48V DC power source that supplies DC power to each MGX 8220 shelf. In North America this circuit breaker should protect against excess currents, short circuits, and earth faults in accordance with national and local electrical codes. These codes are mentioned in the section, “Safety Recommendations.” The dedicated circuit breaker should be sized so that the rated current and the trip delay is higher and longer than the MGX 8220 circuit breaker. A 20A, 1-pole DC circuit breaker with a long trip delay is recommended.

For information purposes, the MGX 8220 shelf uses a 15A, 1-pole DC circuit breaker with medium trip delay on the -48V input. The circuit breaker manufacturer is ETA (part number 43-500-P10-15A).

The DC power connectors attach to the power entry modules at the rear of the shelf through Euro-block 3-pin connectors. For power and ground connections to the MGX 8220 shelf, 12 AWG conductors must be used. If the 48V DC source has wires of a different gage, which accepts the source wires as input and provides as output 12 AWG wires to the MGX 8220 DC connector, a

 

 

Cisco MGX 8220 Installation and Configuration

 

 

 

 

 

 

 

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

 

 

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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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