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DCC Overview 707
associate with multiple destination addresses. Each dialer interface can contain
multiple physical 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 in Figure 224, physical interfaces Serial1, Bri0 and Serial2 belong to
Dialer2, and on Dialer2 there are the maps of the string dialed and destination
addresses.
Resource-Shared DCC
Compared to circular DCC, resource-shared DCC is simpler, and is more flexible due to
the separation of logical and physical configurations. Specifically, resource-shared 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 dial (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 based on RS-attributes set in implementing
resource-shared DCC. 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).
■ Resource-Shared DCC parameters cannot be directly configured on a physical
interface. The physical interface can implement resource-shared DCC 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 resource-shared DCC
Figure 225 Association of the physical interfaces, dialer bundles and dialer interfaces in
Resource-Shared DCC
Dialer1
Dialer2
Destination A
Destination B
Destination C
Physical
interfaces
Dialer
interfaces
Dialer3
Dialer
bundle3
Dialer
bundle2
Dialer
bundle1
Serial0
Bri0
Serial1
Async0
Bri1
Bri2
dialer number
dialer number
dialer number