Device Problems

8. Troubleshooting

Table 8-2. Device Problems

Symptom	Possible Cause	Solutions

Cannot access the unit	Login/password is incorrect,	Reset the unit (see Resetting
or the menu-driven	COM port is improperly	the Unit and Restoring
user interface.	configured, or the unit is	Communication on page 8-3.)
	otherwise configured so it	Contact your service
	prevents access.	Contact your service
	prevents access.	representative.
		representative.

Failure xxxxxxxx	The unit has detected an	Record the 8-digit code from
appears at the top of	internal software failure.	the System and Test Status
the System and Test		screen.
Status screen for		Reset the unit and try again.
Self-Test Results.		Reset the unit and try again.
Self-Test Results.
		Contact your service
		representative and provide the
		8-digit failure code.

No power or the LEDs	The power cord is not	Check that the power cord is
are not lit.	securely plugged into the	securely attached at both ends.
	wall receptacle and the rear
	panel connector.

	The wall receptacle has no	Check the wall receptacle
	power.	power by plugging in other
		working equipment.
		Check the circuit breaker.
		Verify that your site is not on
		an energy management
		program.

Power-On Self-Test	The unit has detected an	Reset the unit and try again.
fails. Only Alarm LED	internal hardware failure.	Contact your service
is on after power-on.		Contact your service
is on after power-on.		representative.
		Return the unit to the factory
		(refer to Warranty, Sales,
		Service, and Training
		Information on page A of this
		document).

Receiving data errors	Frame Relay Discovery is	Change the DLCI Type for each
on a multiplexed DLCI,	being used for automatic	network DLCI from Multiplexed to
but frame relay is okay.	DLCI and PVC	Standard, turning off multiplexing.
	configuration.
	The equipment at the other
	end is not frame relay
	RFC 1490-compliant.

8-12

December 2002

9700-A2-GB20-20

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.

Paradyne 9788, 9720 manual Device Problems Symptom Possible Cause Solutions

Models: 9720 9788

Device Problems

Table 8-2. Device Problems

Symptom

Possible Cause

Solutions

Communication on page 8-3.)

Service, and Training

9700-A2-GB20-20

9720, 9788 specifications