Chapter

Core Module Overview

Core Module Overview

Cisco MGX 8220 modules include a larger front card to provide the functionality of the module, and a smaller back card to provide the connectors and interfaces for external lines. The ASC and the BNM are referred to as the core modules. Both modules must be installed in the shelf. If an optional SRM is also installed, it is considered a core module.

If redundancy is required, a second set of ASC and BNM modules must be configured. Failure of an ASC or BNM causes switchover to the redundant ASC, BNM, and SRM cards. Failure of the active SRM card only causes switchover if the SRM is also included in the redundant set.

This section describes the following core module equipment:

•Cisco MGX 8220 ASC Shelf Controller, page 2-12

The ASC provides overall control of the shelf. Each Cisco MGX 8220 shelf must have at least one ASC. The ASC back card also provides RS-232 and Ethernet ports to attach a control terminal or workstation.

•Broadband Network Modules, page 2-14

The BNM provides the interface to the Cisco BPX network. The connection to the Cisco BPX network is made in one of the following two interface combinations:

–T3 or E3 line using the ATM STI, UNI, or NNI protocol and the Cisco BPX BNI or BXM cards.

–SONET OC-3 or STS-3c line using ATM UNI/B-ICI protocol.

•Service Resource Modules, page 2-22

The optional SRM communicates with all service modules over a bit error rate test (BERT) bus and provides the capability for testing T1 and E1 and subrate service module lines. The SRM can issue various loopup and loopdown commands toward the customer premises equipment (CPE), and generate test bit patterns for any user specified nx64-kbps port. The SRM can also provide 1:N redundancy for FRSM, AUSM, and CESM cards. The SRM-3T3 provides the additional capability of supporting multiple T1 channels over T3 lines on the SRM and distributing those channels to T1 service modules in the shelf.

The core modules work with the service modules to provide the following functions:

•Accept customer traffic received over the service interface lines, adapt them to ATM, and multiplex them onto the BNM trunk for transmission to the Cisco BPX network.

•Accept ATM cells received over the BNM trunk, map them into the specified service protocols, and transmit them over the appropriate service interface.

Note Chapter 4, “MGX 8220 Service Modules”, contains information on the functionality of the various service modules.

A simplified block diagram of the Cisco MGX 8220 hardware is shown in Figure 2-10.As shown by the dashed lines, the ASC, SRM, and cell bus are all 1:1 redundant. This means that one ASC, BNM, and SRM slot set is attached to one cell bus, and the remaining ASC, BNM, and SRM slot set is tied to the other cell bus.

 

Cisco MGX 8220 Installation and Configuration

2-10

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

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Cisco Systems MGX 8220 manual Core Module Overview
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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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