The Cisco uMG9850 QAM Module provides the most versatile solution for Gigabit Ethernet-based digital video networks integrating switching, optics, and quadrature-amplitude-modulation (QAM) functions on one platform - the Cisco Catalyst 4500 Series Switch - to simplify network architectures delivering video-on-demand (VoD) services. Performing as the IP-to-MPEG-2 gateway between the Gigabit Ethernet transport network and the hybrid fiber-coaxial (HFC) cable network, the Cisco uMG9850 QAM Module provides high-performance operation for QAM modulation and upconversion of digital video. The Cisco uMG9850 QAM Module consists of 12 RF ports generating two QAM channels per port for a total of 24 QAMs per module.