Chapter

LMI Interface

In-band Access

To create an in-band access to the MGX 8220 shelf

1.Use an out-of-band method to configure the MGX 8220 IP address to 37. Enter the cnfifip command.

2.Configure the IP address on the connected router or ATM switch

3.The MGX 8220 shelf uses a VPI of 3 and VCI of 8 for in-band access. The connected router or ATM switch must be able to support these values. Configure the router or switch for these VPI/VCI values.

4.From the ATM network, telnet into the MGX 8220 address. The login prompt should appear.

Out-of-Band Access

The MGX 8220 options for out-of-band access are

•Alphanumeric terminal using RS-232 on the ASC maintenance port.

•Computer using SLIP over RS-232 on the ASC control port.

•Ethernet workstation over Ethernet on the ASC Ethernet port.

See Chapter 3, “Managing the Cisco MGX 8220 Shelf.”

LMI Interface

In stand-alone applications, the Annex-G ATM LMI must be disabled in order to suppress ATM LMI related connection alarms. This is achieved by looping back Annex-G LMI messages within the MGX 8220 shelf. Enter the addlmiloop command.

The loopback can be confirmed with the dsplmiloop command and the response of “AtmLmiLoopBack: Loop.”

Configuring the BNM

In stand-alone applications, the BNM card interface format must be configured to UNI before connections can be provisioned. You need to enter the cnfbnmif command to specify the “interface format” parameter as 2 (for UNI).

The BNM interface format is preserved in the BRAM (battery-backed RAM) of the ASC card(s) and need not be reconfigured. The clrallcnf command will not modify the BNM interface format.

Display the current BNM interface format by entering the following command:

shelf.1.3.ASC.a > dspbnmif

The current BNM interface format (in this case, STI) is displayed.

bnmLineInterfaceFormat: bnmSti

 

Cisco MGX 8220 Installation and Configuration

6-2

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

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Cisco Systems MGX 8220 manual LMI Interface, Configuring the BNM, Out-of-Band Access
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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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