This Ethernet-to-Q-bus high-performance, synchronous communications con- troller connects Q-bus systems to Ethernet local area networks. The DS-DSGGB-AA PSU /160407-B21 complies fully with the Ethernet specification, and operates at 10 Mbits per second. The DS-DSGGB-AA PSU /160407-B21 provides Ethernet datalink layer functions and a portion of the physical-channel functions. The DEQNA is supported under DECnet Phase IV software. The DEQNA allows communication with up to 1,023 addressable devices an an Ethernet. It connects physically and electrically to the Ethernet coaxial cable via transceiver cables (DS-DSGGB-AA PSU /160407-B21 series) and an H4000 transceiver or a local network interconnect (DS-DSGGB-AA PSU /160407-B21). The transceiver cable can be a maximum of 45 meters (148 feet) in length for BNE3X series transceiver cable. DEQNDS-DSGGB-AA PSU /160407-B21A-M Ethernet-to-Q-bus single-line communications controller. Includes base module only. For system installation, select one of the following cabinet kits: CK-DS-DSGGB-AA PSU /160407-B21-KA For use with DS-DSGGB-AA PSU /160407-B21-11/83 BAl23 enclosure. Cable length is 21 inches. CK-DEQNA-KB For use with MicroPDP-11 BA23 enclosure. Cable length is 12 inches. CK-DS-DSGGB-AA PSU /160407-B21-KF For use with DS-DSGGB-AA PSU /160407-B21 11/83 H9642 JA/JB cabinet. Cable - - length is 3 feet.