A method of settling trades includes the steps of obtaining an authenticated delivery instrument, wherein the authenticated delivery instrument is authenticated by a first exchange and may be used to settle a trade undertaken on the first exchange. The method includes the steps of positioning a melter assembly relative to the crystal forming apparatus for delivering molten silicon to a crucible of the apparatus. When a PSTN call is placed to a subscriber whose line is being used for internet access, the service control point accesses the subscriber’s internet address from a database and transmits a message over the internet to the subscriber giving the subscriber the option to accept the call as a VOIP call. The first interconnection assembly maintains the plurality of interconnected cartridges at a negative pressure. A decision-making circuit is coupled to the circuit evaluator for formulating a decision in response to the value of the operational parameter. The sensor senses the presence of a connector of the external antenna, and issues a corresponding sensor output signal to a controller that controls a switch in order to alternatively connect one of the internal and external antennas to the RF signal component.