Specifications

Overview of Modem Interfaces
Cisco IOS Modem Components
DC-53
Cisco IOS Dial Technologies Configuration Guide
Figure 12 Cisco AS2511-RJ Access Server
Figure 13 Cisco AS5300 Access Server
Cisco IOS Modem Components
Different components inside Cisco IOS software work together to enable remote clients to dial in and
send packets. Figure 14 shows one Cisco AS5300 access server that is receiving calls from a remote
office, branch office (ROBO); small office, home office (SOHO); and modem client.
Depending on your network scenario, you may encounter all of the components in Figure 14. For
example, you might decide to create a virtual IP subnet by using a loopback interface. This step saves
address space. Virtual subnets can exist inside devices that you advertise to your backbone. In turn, IP
packets get relayed to remote PCs, which route back to the central site.
14479
1 ASYNC 2 3 ASYNC 4 5 ASYNC 6 7 ASYNC 8
9 ASYNC 10 11 ASYNC 12 13 ASYNC 14 15 ASYNC 16
Cisco AS2511-RJ
Modems are outside
the chassis
Modem
Modem
14480
Cisco AS5300
Modems are inside
the chassis