warning

SIP（Session Initiation Protocol）是由IETF定义

Export Regulations. Software, including technical data, is subject to U.S.
export control laws, including the U.S. Export Administration Act and its
associated regulations, and may be subject to export or import regulations
in other countries. Licensee agrees to comply strictly with all such
regulations and acknowledges that it has the responsibility to obtain
licenses to export, re-export, or import Software. Software may not be
downloaded, or otherwise exported or re-exported (i) into, or to a
national or resident of, Cuba, Iraq, Iran, North Korea, Libya, Sudan,
Syria or any country to which the U.S. has embargoed goods; or (ii) to
anyone on the U.S. Treasury Department's list of Specially Designated
Nations or the U.S. Commerce Department's Table of Denial Orders.