Multi-Tech Systems MT5634ZBAV manual #CBS0

	6 Callback Security
#CBS0	Disables callback security. With this command,
	the modem connects as if it did not have callback
	security. This command can be entered after the
	setup password has been entered.
#CBS1	Enables local and remote callback security. Local
	callback security requires that the setup
	password be entered to use the AT command
	set. The only AT commands that are available
	without the setup password are AT, ATI, and
	AT#Sx. For the remote callback security
	description, see the #CBS2 description. This
	command can be entered after the setup
	password has been entered.
#CBS2	Enables remote callback security only. When
	remote callback security is enabled, the modem
	waits for a call, challenges the remote modem,
	calls back the remote modem, and challenges
	the remote modem again. Local security is
	disabled, allowing calls to be made from the
	modem without entering the setup password.
	This command can be entered after the setup
	password has been entered.
#CBS3	Temporarily disables callback security if either
	#CBS1 or #CBS2 is enabled. Callback security
	remains disabled until the hangup command
	(+++ATH) is executed locally or the modem is
	reset. This command can be entered after the
	setup password has been entered.

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