J1

J1 BYTE: Used on Point of Sale Interfaces, the ITU-T G.707 standard defines the Synchronous Digital Hierarchy (SDH), which is widely deployed in Europe. The Bellcore/Telcordia GR-253 standard defines Synchronous Optical Networks (SONETs). J1 VISA: J-1 visitors may remain in the United States until the end of their exchange program, as specified on form DS-2019. Once a J-1 visitor's program ends, he may remain in the United States for an additional 30 days, often referred to as a "grace period," in order to prepare for departure from the country. If the visitor leaves the United States during these 30 days, the visitor may not re-enter with the J-1 visa. The minimum and maximum duration of stay are determined by the specific J-1 category under which an exchange visitor is admitted into the United States. As with other non-immigrant visas, a J-1 visa holder and his or her dependents are required to leave the United States at the end of the duration of stay.