Spousal Contribution Guidelines. You and your spouse must file a joint tax return to take advantage of IRS guidelines for spousal contributions. Under the IRS spousal IRA rules, both spouses can make contributions to their accounts even if only one has earned income.Spouses can also make contributions to each otherâs IRAs.ou and your spouse must file a joint tax return to take advantage of IRS guidelines for spousal contributions. Under the IRS spousal IRA rules, both spouses can make contributions to their accounts even if only one has earned income. Spouses can also make contributions to each otherâs IRAs.
sigmet SIGMET, or Significant Meteorological Information, is a weather advisory that contains meteorological information concerning the safety of all aircraft. There are two types of SIGMETs, convective and non-convective.
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).