3Com 3C13636 Configuration Manual page 1404

3Com Router 3000 Ethernet Family
Configuration Guide
interfaces. In addition, a physical interface does not necessarily belong to any dialer
interface, and can directly route to one or multiple destination addresses.
As shown above, physical interfaces Serial1/0/0, Bri0/0/0 and Serial2/0/0 belong to
Dialer2, and there are different dial-numbers (a kind of address) directing to different
destination addresses for Dialer2. That means Dialer2 has multiple addresses.
II. RS-DCC
Comparing with C-DCC, RS-DCC is concise, and is available with good flexibility due to
the separation of logical and physical configurations. Specifically, RS-DCC has the
following features:
Separate the configuration of physical interfaces from the logical configuration
required for calls and then dynamically binds them. Thus, a physical interface can
provide services for various dial applications.
A dialer interface only associates with a dialing destination address, which is
specified in the dialer number command.
Each logical dialer interface can use the services provided by multiple physical
interfaces, and each physical interface can serve multiple dialer interfaces at the
same time.
Dial attributes are described by RS-attribute set. All the calls originated to the
same destination network use the same RS-attribute set (including the parameters
like dialer interface, dialer bundle, physical interface, etc).
RS-DCC parameters cannot be directly configured on a physical interface. The
physical interface can have RS-DCC service only after it is bound to a dialer
interface.
The figure below shows the association of the physical interfaces, dialer bundles
and dialer interfaces in RS-DCC
Dialer Dialer Dialer Dialer Dialer
bundle3 bundle3 bundle3 bundle3 bundle3
Dialer Dialer Dialer Dialer Dialer
bundle2 bundle2 bundle2 bundle2 bundle2
Dialer Dialer Dialer Dialer Dialer
bundle1 bundle1 bundle1 bundle1 bundle1
Figure 1-2 Association of physical interfaces, dialer bundles and dialer interfaces in
RS-DCC
Physical interface Physical interface Physical interface Physical interface Physical interface
Serial Serial Serial Serial Serial
0/0/0 0/0/0 0/0/0 0/0/0 0/0/0
Bri0/0/0 Bri0/0/0 Bri0/0/0 Bri0/0/0 Bri0/0/0
Bri1/0/0 Bri1/0/0 Bri1/0/0 Bri1/0/0 Bri1/0/0
Bri2/0/0 Bri2/0/0 Bri2/0/0 Bri2/0/0 Bri2/0/0
Serial Serial Serial Serial Serial
1/0/0 1/0/0 1/0/0 1/0/0 1/0/0
Async Async Async Async Async
0/0/0 0/0/0 0/0/0 0/0/0 0/0/0
3Com Corporation
Dialer interface Dialer Dialer interface Dialer Dialer
Dialer number Dialer number
Dialer1 Dialer1 Dialer1 Dialer1 Dialer1
Dialer number Dialer number
Dialer2 Dialer2 Dialer2 Dialer2 Dialer2
Dialer number Dialer number
Dialer3 Dialer3 Dialer3 Dialer3 Dialer3
1-3
Chapter 1 DCC Configuration
Destination A Destination A Destination A Destination A Destination A
Destination B Destination B Destination B Destination B Destination B
Destination C Destination C Destination C Destination C Destination C