A non-volatile memory system including an array of cells, each having an access transistor and a capacitor sharing a floating gate. According to one embodiment of the invention, a wavelength division multiplexing optical network includes a number of nodes each having an optical cross connect and each having stored therein a database representing conversion free connectivity from that node to others of the nodes. The latch member may be adapted to latch with a rigid latch bar or a cantilevered spring. Also, a particularized tone may be heard to identify the incoming call including its service type. The determined pump flow rates can then be used to determine pump flow rates at a measured speed by interpolating between corresponding speed values which bound the measured speed.