Dual interface handover method. None: the same radio interface scans and transfers data. Scan: one designated radio scans only, and the other transfers data. CBB (Connect Before Break): while a radio transfers data, the other ^^^ scans and connects, to allow immediate traffic diversion. PLH (Predictive Linear Handover): variation of CBB where AP's are ^^^ expected to line up, and direction of movement, therefore AP ^^^ signal level slope, determines next AP to use. NOTE! setting this OID is as yet unsupported. Use the GUI instead. [FW:E2148.AC.1:4.12.0.1]