`
`An IP.com Prior Art Database Technical Disclosure
`
`Authors et. al.: Motorola
`Charles P. Schultz
`
`Original Publication Date: November 01, 1996
`IP.com Number: IPCOM000007883D
`IP.com Electronic Publication Date: May 02, 2002
`Copyright: Motorola Inc. November 1996
`
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`at:https://ip.com/IPCOM/000007883
`
`
`
`® MOTOROLA
`
`Technical Developments
`
`COMMUNICATION DEVICE INACTIVITY PASSWORD LOCK
`
`by Charles P. Schultz
`
`When a communication device (radio, phone,
`etc.), is misplaced or left unattended, someone other
`than the authorized user could use it, leaving the
`legitimate user responsible for the consequences,
`financial or otherwise. A password lock feature
`currrently allows users to "lock" their radios from
`use unless a correct password is entered, but this
`feature would not be activated when the device is
`accidentally misplaced, or the user hastily leaves his
`radio behind while attending to some urgent mat(cid:173)
`ter. An improvement over the current radio lock fea(cid:173)
`ture would be for the device to become locked after
`it is inactive for a preprogrammed period of time,
`similar to computer screen "locking" programs.
`
`This invention allows the user to program an
`inactivity timer which would be reset each time a
`"physical input" occurs. If the timer expires, the com(cid:173)
`munication device enters the "locked" mode and
`begins operation on a pre-programmed revert chan(cid:173)
`nel which is defined by one of the personalities stored
`in the device's memory. If the device is operating on
`a system that requires registration with a site, it will
`unregister prior to locking. The device optionally
`sends an over-the-air signal on the revert channel
`indicating the radio's ID and its "locked" status. This
`could alert a dispatcher to use a feature such as
`Remote Monitor to aid in locating a lost or stolen
`device. While locked, the device will not route any
`audio to its speaker. The device will receive and
`respond to over-the-air signaling, including an
`
`"unlock" transmission from the base station which
`can be used to assist users who have forgotten their
`passwords. The device is subject to the same
`unlocking procedure as the present radio password
`lock feature and, upon unlocking, it will register on
`the current site, if applicable. The device stores its
`locked state in non-volatile memory so it remains
`locked when power is cycled.
`
`For the purposes of this feature, a wide variety
`of actions are classified as "physical inputs" so legit(cid:173)
`imate operation will not be interrupted. In addition
`to keypad, button and switch activation, receiving
`bus messages for memory reprogramming will reset
`the timer to insure that reprogramming will not be
`interrupted. A motion-sensing device and circuit
`could also be added to prevent the device from
`locking while it is being carried around in dispatch
`mode.
`
`Some of the devices operating modes will inhibit
`the activation of the inactivity timer. In order to
`facilitate factory testing or field servicing of the device,
`the inactivity timer will not activate when it is in
`"test mode" or during rekeying. The timer will also
`remain inactive during Over-The-Air Programming
`(OIAP) and Over-The-Air-Rekeying (OIAR). To pre(cid:173)
`vent interruption of critical transmissions, locking
`will be inhibited during Emergency feature trans(cid:173)
`missions, and during phone calls to emergency serv(cid:173)
`ices such as 911.
`
`Cl Motorola, Inc. 1996
`
`91
`
`November 1996
`
`
`
`® MOTOROLA
`
`De,·ice lnacti\'ily Password Lock
`
`LOCKING SEQUENCE
`
`RADIO
`
`IDLE
`
`Technical Developments
`
`Charles P. Schultz
`
`y
`
`STORE LOCKED
`STATUS AND
`BLANK DISPLAY
`
`y
`
`DEREGISTER
`
`SWITCH TO REVERT
`CHANNEL
`
`N
`
`N
`
`N
`
`y
`
`SEND ID AND STATUS
`ON REVERT CHANNEL
`
`ST A Y LOCKED UNTIL
`UNLOCK SUCCESSFUL
`
`Cl Motorola, Inc. 1996
`
`92
`
`November 1996
`
`