C H A P T E R 1 Understanding Basic Hardware Architecture And Cisco Ios Software - Cisco AS5350 - Universal Access Server Configuration Manual

Basic Hardware Architecture
Figure 1-1
Asynchronous
interfaces
TTY lines
Cisco AS5350 and Cisco AS5400 Universal Gateway Software Configuration Guide
1-2
Cisco AS5350 and Cisco AS5400 Basic System Architecture
Inside a Cisco
network gateway
V
Group-async
interface
Cloning
Modems
POTS line
Client Client
PC modem
Chapter 1 Understanding Basic Hardware Architecture and Cisco IOS Software
Dialer interface
controlling the
D channels
TDM bus
T1 controllers
PRI lines
PSTN
BRI line
V
ISDN
router
Legend
= Synchronous PPP
= Asynchronous PPP
= Configuration
template
V
Routing and
switching engine
Cloning
Serial interface
channels S0:1, S0:2...
Client
PC
IP
network
OL-3418-02 B0