Cisco AS5800 Specifications download pdf (Page 20)

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Cisco AS5800 Operations, Administration, Maintenance, and Provisioning Guide

DOC-7810814=

Chapter1 Introduction

Cisco AS5800 Functional Profile

In addition to the system controller, a network management system (CiscoWorks) with a graphical user

interface (GUI) runs on a UNIX SPARC station and includes a database management system, polling

engine, trap management, and map integration.

The dial shelf contains ingress interfaces (CT1/CE1/PRI) that terminate ISDN and modem calls, and

break out individual calls (DS0s) from the appropriate telco services. Digital or ISDN calls are

terminated onboard the trunk card HDLC controllers, and analog calls are sent to modem resources on

the modem cards. As a result, any DS0 can be mapped to any HDLC controller or modem module.You

can install multiple ingress interface cards of similar or different types. This enables you to configure

your systems as fully operative, port redundant, or card redundant, depending on your needs.

Trunk cards and modem cards are tied together across a time division multiplexing (TDM) bus on the

dial-shelf backplane. The backplane TDM bus transmits and receives PCM-encoded analog data to and

from the modem cards. Then the dial shelf and the router shelf exchange framed packets via a proprietary

interconnect cable for further processing.

The dial shelf also contains a DSC card that provides clock and power control to the dial-shelf feature

cards. Each dial-shelf controller card contains a block of logic referred to as the common logic and

system clocks. This block generates the backplane Stratum-4 compliant 4-MHz and 8-KHz clocks used

for interface timing and for the TDM bus data movement. The common logic can use a variety of sources

to generate the system timing, including an E1 or T1 input signal from the BNC connector on the

dial-shelf controller card front panel. The clock source can also be telco office timing units (BITS

clocking) extracted from the network ingress interfaces.

On the DSC card, only one common logic is active at any one time, which is identified by the CLK

(clock) LED on the DSC card front panel. The active common logic is user selectable and is independent

from each dial-shelf controller card. This ensures that, if a DSC card needs replacing or if the slave DSC

card becomes master, clocking remains stable. The selected common logic should not be changed during

normal operation, unless related hardware failure is suspected or diagnosed.

Note Software support for redundant DSC cards will be available soon.

The Cisco 7206 router shelf supports call signaling for PRI interfaces; packet processing, and routing;

and all commonly used high-speed LAN and WAN interfaces including Fast Ethernet (FE),

Asynchronous Transfer Mode (ATM), High-Speed Serial Interface (HSSI), and Fiber Distributed Data

Interface (FDDI). These interfaces are supported by common port adapters that are configured on the

Cisco 7206 router shelf.

You can install and upgrade software remotely, without affecting current system operation. You can also

upload and download configuration files remotely, without affecting current system operation. Remote

access is enabled by using SNMP, a Telnet session to a console port on the router shelf, the World Wide

Web (WWW) interface, or the optional system controller network management system.

The Cisco AS5800 can dynamically adjust any port to support any user configuration. Individual users

can be authenticated as they connect to the system by use of one or more authentication servers using

RADIUS and TACACS+ authentication protocols. Primary and backup authentication servers can define

user authentication parameters via user domain and the number called. User profile information can also

be configured to include time of day, number of simultaneous sessions, and number of B channels used.

A remote LAN user can connect to the Cisco AS5800 via an ISDN line or asynchronous serial

connection, be authenticated, and establish a session. In addition to dynamic or static address

assignments, this connection requires the traditional Cisco IOS software support for different routing

protocols on different ports simultaneously, with virtually no impact on service provider routing tables.

A dial wholesale customer can connect to a Cisco AS5800, and tunnel PPP packet information to a retail

service provider using dial virtual private network (dial VPN).

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Cisco AS5800 Specifications Page 20

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