PVC Status Management

Chapter

Frame Relay Service Modules (FRSMs)

The management of the ATM layer and FR PVC Status Management can operate independently. The PVC status from the ATM layer will be used when determining the status of the FR PVC. However, no direct actions of mapping LMI A bit to OAM AIS will be performed.

Frame-Relay-to ATM Service Interworking (SIW)

By specifying “service interworking” as the channel type when adding a Frame Relay PVC to an FRSM, all PVC data is subject to service interworking translation and mapping in both the Frame Relay–to–ATM and ATM–to–Frame Relay directions.

Figure 4-2shows a BPX 8620 network with service interworking connections.

Figure 4-2 BPX Network with Service Interworking Connections

T1 or E1

ATM FUNI CPE

ATM UNI CPE

T1 or E1

FRSM

AUSM

		BPX 8620 network
	MGX	BPX 8620 network
	MGX	PVCs
	8220	PVCs
	8220

BPX 8620

T3, E3, OC3

ATM-UNI CPE

MGX 8220

FRSM

H8268

FR UNI

CPE

Figure 4-2shows an MGX 8220 unit and an FRSM to the right with three Frame Relay connection endpoints. These connections indicate the Frame Relay ends of service interworking connections. The diagram shows some possibilities for terminating the other ends of the connections.

•ATM FUNI (Framed UNI) port on an FRSM

•ATM UNI port on an AUSM

•ATM UNI port on a BPX 8620 ASI card

The service interworking is full Frame Relay Forum (FRF.8) compliant and provides full support for routed and bridged PDUs, transparent and translation modes, and VP translation.

Cell Loss Priority and Congestion Indication

In addition to frame-to-cell and DLCI to VPI/VCI conversion, the service interworking feature maps cell loss priority and congestion information between the Frame Relay and ATM formats. The CLP and congestion parameters can be modified for individual connections with the cnfchanmap command.

	Cisco MGX 8220 Installation and Configuration
4-4	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 Frame-Relay-to ATM Service Interworking SIW, PVC Status Management

Models: MGX 8220