3com 3031 Instruccion De Instalación

By default, Circular DCC is enabled on ISDN PRI interfaces, but disabled on other 
interfaces (Serial, Asynchronous, AUX, etc.) and the user should manually 
configure the 

 command. If no dialer interface is 

created then by default, the physical interfaces do not belong to any dialer circular 
group.

Each RS-attribute set consists of a dialer interface, the attributes of the interface, 
and a dialer bundle. Specifically, 

■

Only one dialing number can be defined for a dialer interface. Since this dialing 
number has its own dial attributes set, all the calls originated by dialing this 
number can use the same DCC attribute parameters (such as dialing rate).

■

Each dialer interface can use only one dialer bundle, which contains multiple 
physical interfaces of different priorities. However, each physical interface can 
be used by different dialer bundles. For an ISDN PRI interface, the number of B 
channels used can be configured by using the 

 command.

■

All the calls aimed to the same destination segment use the same RS-attribute 
set.

Due to the differences between the configurations of logical and physical 
interface, Resource-Shared DCC are applicable for more network topologies and 
DCC dialing requirements, especially for the situation in which multiple interface 
groups originate calls to multiple remote interfaces.

Figure 266   Multiple interfaces placing calls to multiple remote ends in the 
Resource-Shared DCC implementation

As shown in the above figure, different dialer interfaces are used for establishing 
calls to different remote ends. (That is, one dialer interface only corresponds to 
one remote end). A physical interface can generate calls to different destinations 
by joining the interface into bundles, each of which corresponds to a certain dialer 
interface.

Delete the existing configuration of the dialer 
interface

Add a physical interface to the specified dialer 
circular group

Delete the physical interface from the 
specified dialer circular group

Table 1118   Configuring multiple local interfaces to receive calls from multiple remote 
ends

Router

Remote end C

Single/Multiple interface(s)

Local end

(multiple interfaces)

Remote end B

Single/Multiple interface(s)

Remote end A

Single/Multiple interface(s)

if1

if2

if3

Physical interface

groups

Call

Remote end A

Call

Remote end B

Call

Remote end C

Dialer0

Dialer1

Dialer2

Router

Router

Router