ETS 300 425 : 20001现行
PRIVATE TELECOMMUNICATION NETWORK (PTN); SPECIFICATION, FUNCTIONAL MODEL AND INFORMATION FLOWS - CALL INTRUSION SUPPLEMENTARY SERVICE
出版：European Telecommunications Standards Institute
专家解读视频
Describes the Call Intrusion supplementary service (SS-CI), which is applicable to basic services supported by Private Telecommunication Networks (PTNs). Basic services are specified in ETS 300 171. This is a supplementary service which enables the user to establish communication with a busy called user (user B) by breaking into an established call between user B and a third user (user C).
DIN ETS 300425 : 1996 - Identical
ECMA 202 : 2ED 97 - Corresponds
NBN ETS 300 425 : 1996 - Identical
PN ETS 300 425 : 2005 - Identical
DIN ETS 300425 : 1996 - Identical
