4. Configuration Options

Table 4-2. CSU/DSU Frame Relay and LMI Options (2 of 3)

LMI Behavior (9783 and 9788)

Possible Settings: Independent, Net1-FR1_Follows_Port-1,

Port-1_Follows_Net1-FR1, Port-1_Codependent_with_Net1-FR1

Default Setting: Port-1_Codependent_with_Net1-FR1

Configures the state of LMI on Port-1 and the state of the ATM link on the network interface to be passed from one interface to another.

Independent – Handles the state of each interface separately so that the LMI state of Port-1 has no effect on the state of the ATM link on the network interface, and vice versa.

Net1-FR1_Follows_Port-1– Brings down VCs cross-connected to Port-1 on the network interface when LMI on Port-1 goes down, and sends F5 OAM cells on all network VCs cross-connected to Port-1 DLCIs to alert the network and far-end device that frame relay data can not be delivered through the device. When LMI on Port-1 comes back up, the network VCs are also re-enabled. This setting is useful at a central site when the remote site router on the other end of the PVC connection can initiate recovery via a redundant central site when there is a catastrophic central site LAN or router failure. Not recommended for NSPs.

Port-1_Follows_Net1-FR1– Brings down LMI on Port-1 when there is a physical failure or ATM failure on the network interface. When the alarm on the network interface is cleared, Port-1 is re-enabled and its control leads are reasserted. This setting is useful if the router connected to Port-1 is used to initiate recovery when network failures are detected.

Port-1_Codependent_with_Net1-FR1– The LMI state for Port 1 and the Net1-FR1 interface are dependent on each other. If the LMI is down on either interface, the system will bring the LMI down on the other interface. When the LMI is up on either interface, the system will bring the LMI up on the other interface. When Port-1 LMI goes down, in addition to bringing down the internal network frame relay link, the unit also sends

F5 OAM cells on all network VCs cross-connected to Port-1 DLCIs to alert the network and far-end device that frame relay data can not be delivered through the device. Use this setting when backup is through the router instead of the unit. Note that when the router is disconnected, the NSP cannot access the unit using multiplexed VCs.

LMI Error Event (N2)

Possible Settings: 1 – 10

Default Setting: 3

Configures the LMI-defined N2 parameter, which sets the number of errors that can occur on the LMI link before an error is reported. Applies to both the user and network sides of a UNI.

1 – 10 – Specifies the maximum number of errors before reported.

LMI Clearing Event (N3)

Possible Settings: 1 – 10

Default Setting: 1

Configures the LMI-defined N3 parameter with the number of error-free messages that must be received before clearing an error event. Applies to both the user and network sides of a UNI.

1 – 10 – Specifies how many error-free messages it will take to clear the error event.

9700-A2-GB20-20

December 2002

4-11

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Paradyne 9720, 9788 manual CSU/DSU Frame Relay and LMI Options 2, LMI Error Event N2, LMI Clearing Event N3
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9720, 9788 specifications

The Paradyne 9820-8M, 9788, 9128 standalone, 9128 carrier-mount, and 9820-2M are critical components in telecommunications networks, designed to enhance data transmission and improve connectivity. Each model offers unique features and capabilities that cater to various requirements in both enterprise and service provider environments.

The Paradyne 9820-8M is a multi-service access platform that provides high-speed connectivity for voice, video, and data transmission. It supports multiple protocols, enabling seamless integration into existing infrastructures. Key features include a modular design that allows for scalability and easy upgrades, ensuring that organizations can adapt to evolving demands. Its advanced error correction and QoS (Quality of Service) features ensure reliable performance, even in challenging network conditions.

The Paradyne 9788 serves as a versatile platform for both digital and analog communications. It excels in the delivery of broadband services, supporting T1/E1 lines and providing robust mechanisms for data transmission. This model emphasizes redundancy and resilience, with built-in protection switching capabilities that maintain service continuity during faults or maintenance activities. Its compact design makes it an ideal solution for environments with space constraints.

The 9128 standalone model is aimed at customers requiring an easy-to-deploy solution for point-to-point connections. This model offers critical features such as an intuitive user interface, comprehensive diagnostics, and monitoring capabilities that facilitate system management. It also supports diverse network topologies, making it suitable for various deployment scenarios.

In contrast, the 9128 carrier-mount version is engineered for organizations needing to manage multiple connections within a central office or remote site. This model is specifically designed to be mounted in standard telecom racks, optimizing space utilization while maintaining high performance. Its robust hardware allows for excellent thermal management and environmental resilience.

Lastly, the Paradyne 9820-2M combines versatility with high-performance capabilities, making it a reliable choice for service providers. It features dual-channel support, enabling simultaneous transmission and providing a cost-effective solution for high-capacity data needs. With enhanced security features, including encryption capabilities, the 9820-2M ensures that sensitive information transmitted across networks is protected against unauthorized access.

Collectively, these Paradyne models exemplify advanced telecommunications technology, offering scalability, resilience, and high performance. Their diverse features cater to the unique demands of various users, from enterprise networks to service providers, facilitating the continual evolution of communication technologies.
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