Cisco AS5350XM Configuration Manual page 30

Basic Hardware Architecture
Figure 1
Inside a Cisco
network gateway
Asynchronous
interfaces
TTY lines
Modems
Client
PC
Cisco AS5350XM and Cisco AS5400XM Universal Gateways Software Configuration Guide
2
Cisco AS5350XM and Cisco AS5400XM Basic System Architecture
V
Group-async
interface
Cloning
POTS line
Client
modem
= Synchronous PPP
= Asynchronous PPP
= Configuration
template
Understanding Basic Hardware Architecture and Cisco IOS Software
Dialer interface
controlling the
D channels
Cloning
Serial interface
channels S0:1, S0:2...
TDM bus
T1 controllers
PRI lines
PSTN
BRI line
V
ISDN
router
Legend
IP
network
V
Routing and
switching engine
Client
PC