Clocking, LED and Alphanumeric Indicators

Chapter 3 Channelized T3 Trunk Card

CT3 Trunk Card Overview

Clocking

All Cisco AS5800 access server trunk cards use the same transmit clock. This clock can originate from the following sources:

•TDM clock source—A priority value from 1 to 50 that is applied to a clock source when multiple clock sources are used

•External clock source—A clock source external to the access server

Clocks are prioritized by slot number (slots 0 to 5). The highest-priority clock is selected from the card in slot 0 and used as the default clock. If this clock fails, the highest-priority clock from the card in slot 1 becomes the default clock, and so forth.

The trunk card then forwards the clocks to the dial shelf controller. The dial shelf controller selects the highest-priority clock as the system primary clock, and the rest of the clocks remain in a prioritized backup queue.

Instead of using the default algorithm for clock selection, you can specify clocks through global configuration and select a maximum of two clocks per trunk card.

If you configure fewer than two clocks on a trunk card and all other configured clocks fail, clock selection resorts to the default algorithm on that card and the second clock will be selected automatically.

CT3 Clocking

CT3 trunk cards are usually attached to an external device, such as a Digital Access and Crossconnect System (DACS) or Add-Drop Multiplexer (ADM). This point-to-point link requires a single clock source to which the CT3 link is timed. You must determine whether you want the CT3 trunk card or an external device to be used as the primary clock source and configure it accordingly during the software configuration process, which is discussed in the “Configuration Commands” section on page 3-12.

CT1 Clocking

The CT3 trunk card has 28 T1 framers that always get their clock from the line. As a result, configuration of T1 clock sources is not allowed.

LED and Alphanumeric Indicators

The CT3 trunk card front panel is designed with LED and alphanumeric displays to provide trunk card status. (See Figure 3-3.)

Cisco AS5800 Universal Access Server Dial Shelf Card Guide

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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.