From the NannyMUD documentation

LAST CHANGE

2000-12-11

FUNCTION

NAME
        _disconnect - hard disconnect (Restricted to 28++)


SYNTAX
	void _disconnect(object)

DESCRIPTION
	This function is used to disconnect a player object from the network
	link (ie, simulate a network link down).


NOTE
	Only wizards of exalted level and higher and objects in /local, /obj
	and /room may use this efun.


SEE ALSO
        wizlevels in wizinfo/wizlevels