Phoenix, Arizona-based AG Communications Systems Corp has slashed the price on its WindowPhone 1.1 personal call management system by 40% to $300: WindowPhone links the Windows personal computer to a telephone and offers features such as identifying a caller by name in a pop-up window on the screen, providing instant access to detailed caller information; it also maintains a complete log of all incoming and outgoing call activity; the product includes an 8-bit board; AG Communication Systems is a joint venture of AT&T Co and GTE Corp.