Chapter

Cisco MGX 8220 System Overview

•Frame forwarding

–56 kbps, nx64 kbps, T1, E1, HSSI, X.21

•Circuit emulation

–T1, E1, nx64 kbps

•ISDN switched access

•SNA services

–SDLC and bisync, DS-0, DS-0A

Physical connectivity is provided through individual HSSI, X.21, T1 or E1 ports, V.35, or through channelized T1/E1 interfaces.

Using the service resource module (SRM), multiple T1 interfaces can be supported on physical T3 lines. Frame based services on T3 and E3 high speed lines are also supported.

The Cisco MGX 8220 shelf also supports the use of inverse multiplexing for ATM (IMA) to provide ATM trunking below T3/E3.

Scalability

The Cisco MGX 8220 edge concentrator aggregates traffic from as many as 80 T1 or E1 ports onto a single port of a multiport broadband trunk card. This high port density maximizes use of the Cisco BPX 8600 series high-capacity switch fabric. Each 9-inch rack-mount shelf supports up to 80 DS-1 or E1 ports, or more than 2000 64-kbps users. The Cisco MGX 8220 edge concentrator has a compact footprint that minimizes the space required within central offices.

Standards-Based Conversion to ATM

All user information received by the Cisco MGX 8220 interfaces is converted into 53-byte ATM cells using standard ATM adaptation layers (AALs) for transport over the ATM backbone network. Cell segmentation and reassembly (SAR) and other adaptation functions are distributed to each interface module to eliminate system bottlenecks. The following AAL standards are used:

•AAL1 for circuit emulation services.

•AAL5 and FR-SSCS (Frame Relay Service Specific Convergence Sublayer) for Frame Relay (FR to ATM network interworking).

•For Frame Relay to ATM service interworking, both transparent and translation modes are supported to map FR to native ATM AAL5.

•AAL5 for Frame forwarding.

 

Cisco MGX 8220 Installation and Configuration

1-4

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

Page 35 Page 37
Page 36
Image 36
Cisco Systems MGX 8220 manual Scalability, Standards-Based Conversion to ATM
Page 35 Page 37

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.
Top Page Image Contents