Abstract: This invention provides telecommunication companies and operators of private branch exchanges (PBXs) with the ability to detect the use of modem calls and bill the user accordingly. By detecting a modem call, the telecommunication company and PBX operator can bill the modem call differently than a voice call. Billing rate structure plans can be created based on the connection time of the modem call, the number of bits transferred during the modem connection, or a combination of both connection time and number of bits transferred.

Abstract: An apparatus and method for illuminating a message lamp on analog customer premises equipment (CPE) under the control of a digital switch. A message conversion circuit (MCC) which is positioned intermediate to the digital switch and the analog CPE controls an on-hook isolation and relay circuit to selectively connect the subscriber line associated with the analog CPE with a voltage supply to illuminate the message lamp.

Abstract: Tractor with speed-responsive circuit-interrupting switch for automatically dousing, at night, flood work lamps provided in a lighting circuit on the tractor. Switching is controlled according to a microcomputer chip program by which frequency of a ground speed transducer is compared with the speed limit speeds pre-assigned to an intermediate tractor speed range; thus deluminizing occurs, necessarily on the highest side, at one speed commonly associated with highway rate of travel whereas, on the lower side, the switching effective to reconnect and relight the lamps is at a materially different desired speed of the tractor.