HP HOI-653A是一款Hewlett-Packard接口总线（HP-IB）到VXI总线的接口，它占用一个C型大型机插槽。面板具有信号器、时钟和触发器连接器、接口端口和提取杆。HP E1406A命令模块上有四个报警器，显示以下内容：Failed显示命令模块的电源打开失败自检或在某个时间点停止工作，SYSFAIL显示VXI总线背板上的SYS。

It is a Hewlett Packard Interface Bus (HP-IB) to VXI bus interface that occupies a C-type mainframe slot. The panel has signalers, clock and trigger connectors, interface ports, and extraction rods. There are four alarms on the HP E1406A command module, displaying the following information: Failed displays the power on self-test of the command module or stops working at a certain point in time, and SYSFAIL displays SYS on the VXI bus backplane.