CLEARWATER, Fla., Aug. 30 -- Digital Lightwave Inc. said that Cisco Systems has placed a $2 million, multi-unit order for a cross section of the company's portable Network Information Computers for high-speed optical monitoring and analysis. The order is made up of the company's OC-12, OC-48, and OC-192 models of the NICs. Digital Lightwave will ship the orders during this quarter.