def broadcastSignal(self, member, signature=None, body=None,
                        path='/org/freedesktop/DBus',
                        interface='org.freedesktop.DBus'):
        """
        Sends a signal to all connections with registered interest

        @type member: C{string}
        @param member: Name of the signal to send

        @type path: C{string}
        @param path: Path of the object emitting the signal. Defaults to
                     'org/freedesktop/DBus'

        @type interface: C{string}
        @param interface: If specified, this specifies the interface containing
            the desired method. Defaults to 'org.freedesktop.DBus'

        @type body: None or C{list}
        @param body: If supplied, this is a list of signal arguments. The
            contents of the list must match the signature.

        @type signature: None or C{string}
        @param signature: If specified, this specifies the DBus signature of
            the body of the DBus Signal message. This string must be a valid
            Signature string as defined by the DBus specification. If the body
            argumnent is supplied , this parameter must be provided.
        """
        if not isinstance(body, (list, tuple)):
            body = [body]

        s = message.SignalMessage(path, member, interface,
                                  None, signature, body)
        self.router.routeMessage(s)