3com MSR 20-20 참조 매뉴얼

[Sysname-Serial2/0] dialer circular-group 1

[Sysname-Serial2/0] quit

[Sysname] interface serial 2/1

[Sysname-Serial2/1] dialer circular-group 1 

dialer disconnect [ interface interface-type interface-number ]

Any view

interface interface-type interface-number: Specifies an interface by its type and 
number.

Use the dialer disconnect command to clear the dialup link on an interface or 
all dialup links if no interface is specified.

# Clear the dialup link on interface Dialer0.

<Sysname> dialer disconnect interface dialer0 

Dial interface (physical or dialer) view

None

Use the dialer enable-circular command to enable circular dial control center 
(C-DCC).

Use the undo dialer enable-circular command to disable C-DCC.

By default, C-DCC is enabled on ISDN BRI and PRI interfaces but disabled on other 
interfaces.

You need to enable C-DCC before you can use it.

To use resource-shared DCC (RS-DCC) on a dialer interface, you need to configure 
the dialer user command and the dialer bundle command on the dialer 
interface and assign physical interfaces to the dialer bundle with the dialer 
bundle-member command.

After you disable C-DCC, the system clears all configurations on dial interfaces. To 
make them recover, you need to shut down and then bring up them by 
performing the shutdown command and then the undo shutdown command.