The use of each type of chemotherapy drug (or combination of drugs) for metastatic breast cancer is called a âlineâ of treatment. For example, the first chemotherapy used is called the âfirst-lineâ treatment and the second is called the âsecond-lineâ treatment.
RigNet Inc. is a data network infrastructure provider serving the remote communications needs of the oil and gas industry.
Short for Synchronous Optical Network, a standard for connecting fiber-optic transmission systems. SONET was proposed by Bellcore in the middle 1980s and is now an ANSI standard. SONET defines interface standards at the physical layer of the OSI seven-layer model.The standard defines a hierarchy of interface rates that allow data streams at different rates to be multiplexed.SONET establishes Optical Carrier (OC) levels from 51.8 Mbps (OC-1) to 9.95 Gbps (OC-192).he standard defines a hierarchy of interface rates that allow data streams at different rates to be multiplexed. SONET establishes Optical Carrier (OC) levels from 51.8 Mbps (OC-1) to 9.95 Gbps (OC-192).