OC signal levels put STS frames onto multimode fiber-optic line at a variety of speeds. ODA Open Document Architecture . ISO standard that specifies how documents are represented and transmitted electronically. Formally called Office Document Architecture . ODI Open Data-Link Interface .
OEMI channel See block multiplexer channel .
Office Document Architecture See ODA . Ohio Academic Resources Network See OARnet . OIM OSI Internet Management . OIR Online insertion and removal . Feature that permits the addition, replacement, or removal of interface processors in a Cisco router without interrupting the system power, entering console commands, or causing other software or interfaces to shut down.