Understanding the Basic Hardware Architecture

Figure 2-1 shows the logical and physical system architecture for the Cisco AS5300. It illustrates the components used to process a call.

I Understanding the Basic Hardware Architecture

Figure 2-1 Cisco AS5300 Basic System Architecture

Inside a Cisco network access server

Group-async interface

Asynchronous interfaces

TTY lines Modems

Client PC

Dialer interface controlling the D channels

Cloning

Group-async interface

TDM bus T1 controllers

Asynchronous interfaces

TTY lines Modems

Dialer interface controlling the D channels

Cloning y Serial interface channels S0:1, S0:2.

PRI lines

Client PC

Client modem

ISDN router

Routing and switching engine

Routing and switching engine

Client modem y Serial interface channels S0:1, S0:2.

TDM bus T1 controllers

PRI lines

ISDN router

Client PC

Client PC

Legend

À

= Synchronous PPP

o

= Asynchronous PPP

= Configuration

template

| Section 2 Commissioning the Cisco AS5300 Hardware_

Verifying Basic Setup I

Figure 2-1 shows the following:

• Client modems and ISDN routers dial into the access server through the PSTN.

• Analog PPP calls connect to modems inside the access server.

• Each modem inside the access server provides a corresponding TTY line and asynchronous interface for terminating character and packet mode services.

• Asynchronous interfaces clone their configurations from a group-async interface.

• Synchronous PPP calls connect to serial interface channels (for example, S0:1 and S0:2).

• Synchronous interfaces clone their configurations from a dialer interface. One analog PPP call consumes:

• One integrated modem

• One asynchronous interface One synchronous PPP call consumes:

• One serial interface channel

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