Troubleshooting the Dial Shelf Processor Subsystem

—If power is supplied to the router shelf but the enabled LED remains off, the system has detected a hardware failure. You need to replace the interconnect port adapter.

•Is the link LED on?

The link LED indicates an active connection to the dial shelf. This LED lights when the dial shelf interconnect port adapter is receiving a carrier signal from the dial shelf.

—If the link LED remains off, check the dial shelf interconnect cable connection and tighten the jack screws at both ends of the cable.

—If the connection is good but the link LED remains off, proceed to the section “Troubleshooting the Dial Shelf Controller Card.”

Troubleshooting the Dial Shelf Processor Subsystem

The following sections describe troubleshooting procedures for the DSC card, modem cards, VoIP card, and trunk cards.

Troubleshooting the Dial Shelf Controller Card

Check the following to help isolate a problem with the dial shelf controller card:

•Are the two power LEDs on?

Verify that the power LED and MBus LED light after the dial shelf controller card has been completely inserted into the dial shelf and the system is powered on.

—If both the MBus and power LEDs are on, the card should boot normally. During the boot sequence, the four alarm LEDs should momentarily flash and then turn off. In addition, the two four-character alphanumeric displays show status messages.

After the boot sequence completes, the alphanumeric display should read:

MSTR

If the boot sequence does not finish, contact a service representative for assistance.

—If either the power or MBus LED remains off, try removing and reinserting the card. If the problem persists, contact your service representative. You might need to replace the card.

If the problem persists with a new card installed, remove the dial shelf controller card from the dial shelf slot and examine the backplane for bent connector pins.

To inspect the backplane pins, first power OFF the system to avoid hazards caused by high voltages present on the backplane connectors. Next, remove cards in neighboring slots to allow an unimpeded view of the backplane connectors. Then, using a flashlight, verify that the backplane connectors are in good condition. If you discover bent pins, you need a new backplane. The backplane is an FRU. Contact your service representative to order a new backplane.

•You can also use the show command to diagnose a problem with the dial shelf controller card. Enter the following command:

router> enable

enter password <password>

router# show diag <type {shelf slot}>

Ctrl-Z

Hardware Troubleshooting 5-13

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Cisco Systems AS5800 Troubleshooting the Dial Shelf Processor Subsystem, Troubleshooting the Dial Shelf Controller Card
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AS5800 specifications

Cisco Systems has long been a leader in the networking and telecommunications field, and its AS5800 series of routers exemplify this tradition. The AS5800, along with the AS5850, AS5350, AS5400, and AS5300, provides robust solutions for service providers and enterprise-level networking applications. Each of these models has distinct features and characteristics that cater to the evolving demands of internet traffic and data processing.

The Cisco AS5800 is designed for high-capacity routing and optimized for broadband services. It supports a wide range of services, including voice, data, and video applications, making it a versatile option for service providers looking to deliver integrated solutions. It is equipped with advanced quality of service (QoS) features that ensure bandwidth is allocated effectively, holding strong even under heavy traffic conditions.

In comparison, the AS5850 offers superior processing capabilities and is typically utilized in larger-scale implementations. This model supports high-density interfaces, allowing numerous connections without compromising performance. Its architecture includes enhanced MPLS (Multiprotocol Label Switching) support, enabling more efficient traffic management and better utilization of network resources.

The AS5350 is known for its scalability and energy efficiency, ideal for voice-over-IP (VoIP) and media gateway applications. It supports various telephony features, such as protocol interworking and transcoding, making it a preferred choice for organizations focusing on digital voice technologies. The AS5300, while slightly older, continues to be a valuable asset for less demanding networks, offering reliable performance with VoIP capabilities and basic data applications.

The AS5400 bridges the gap between high-performance routing and operational efficiency. It incorporates Cisco's proprietary technologies to ensure seamless connectivity and robust failover systems. This model is highly regarded for its security features, protecting network integrity and providing peace of mind for businesses relying on sensitive data transfer.

Overall, Cisco’s AS5800 series showcases a progressive evolution of routing capabilities with enhanced features tailored for resilience, scalability, and performance. These routers not only address the technical needs of modern networks but also strategically position organizations for future growth in an increasingly digital world. Each model, with its unique attributes, continues to support the varied demands of global communication infrastructures.
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