ASMI is an acronym for Advanced System Management Interface.
"The ASMI (Advanced System Management Interface) is the interface to the service processor that is required to perform general and administrator-level service tasks, such as reading service processor error logs, reading vital product data, setting up the service processor, and controlling the system power. The ASMI may also be referred to as the service processor menus." 
- ASMI from IBM Systems Hardware Information Center
- "Ethernet vary off/on - no twinax" thread from March 2008 at MIDRANGE-L