Maintaining Safety with Electricity

Chapter

Safety Recommendations

•Wear safety glasses if you are working under any conditions that might be hazardous to your eyes.

•Never attempt to lift an object that might be too heavy to lift alone.

•Always power OFF all power supplies and unplug all power cables before opening, installing, or removing a chassis.

Warning Before working on a unit or near power supplies, unplug the power cord(s) on AC units; disconnect the power at the circuit breaker on DC units.

Follow these basic guidelines when working with the electrical equipment:

•Locate the emergency power-OFF switch for the room you are working before beginning any procedures requiring access to the interior of the MGX 8220 chassis.

•Disconnect all power and external cables before installing or removing a chassis.

•Examine your work area for possible hazards (for example, moist floors, ungrounded power extension cables, frayed power cords and missing safety grounds).

•Never work alone when potential hazardous conditions exist.

•Never assume the power has been disconnected from a circuit; always check.

•Never perform any action that creates a potential hazard or makes the equipment unsafe for people.

•Never install equipment that appears damaged.

Warning For protection against shock hazard, verify that all power cords are disconnected before servicing the unit. The maximum voltage that may be present in the unit is 240 VAC in AC systems and 48 VDC in DC systems.

Grounding

The two 48V DC power feeds must be properly grounded on the positive 48V and safety ground pins.

Ensure that the MGX 8220 frame and all other frames are attached to an isolated ground connection.

For AC systems, an insulated grounding conductor that is identical in size to the grounded and ungrounded branch circuit supply conductors, but is green with yellow stripes, and installed as part of the branch circuit that supplies the unit. The grounding conductor described is a separately derived system, at the supply transformer or motor generator set.

	Cisco MGX 8220 Installation and Configuration
7-2	Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003

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.

Cisco Systems MGX 8220 manual Maintaining Safety with Electricity, Grounding

Models: MGX 8220

Safety Recommendations