The Ethernet-to-Q-bus high-performance synchronous communications con- troller (PC 480 PC744-BX Powersupply) connects Q-bus systems to Ethernet local area networks. The PC 480 PC744-BX Powersupply has FCC certification, complies fully with the Ethernet specification, and operates at 10 Mbits per second. The DEQNA provides Ethernet data link layer functions and a portion of the physical-channel functions. The DEQNA is supported under DECnet Phase IV software, and allows communication with up to 1,023 addressable devices an an Ethernet. PC 480 PC744-BX Powersupply-M Ethernet-to-Q-bus single-line communications controller. Includes base module only. For system installation, select one of the cables and the following cabinet kits: CK-PC 480 PC744-BX Powersupply-KA For use with MicroVAX II PC 480 PC744-BX Powersupply enclosure. Cable length is 21 inches. CK-PC 480 PC744-BX Powersupply-KB For use with PC 480 PC744-BX Powersupply II BA23 enclosure. Cable length is 12 inches. CK-PC 480 PC744-BX Powersupply-KF For use with PC 480 PC744-BX Powersupply II H9642-JA/JB cabinet. Cable length is 36 inches.