3Com MSR 50, MSR 30 manual Dialer disconnect, Dialer enable-circular, Undo dialer enable-circular

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	[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
Syntax	dialer disconnect [ interface interface-type interface-number ]
View	Any view
Parameter	interface interface-typeinterface-number: Specifies an interface by its type and
	number.
Description	Use the dialer disconnect command to clear the dialup link on an interface or
	all dialup links if no interface is specified.
Example	# Clear the dialup link on interface Dialer0.
	<Sysname> dialer disconnect interface dialer0
dialer enable-circular
Syntax	dialer enable-circular
	undo dialer enable-circular
View	Dial interface (physical or dialer) view
Parameter	None
Description	Use the dialer enable-circularcommand to enable circular dial control center
	(C-DCC).
	Use the undo dialer enable-circularcommand 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.