This International Standard specifies the Call Intrusion supplementary service (SS-CI), which is applicable to various basic services supported by Private Integrated Services Networks (PISN). Basic services are specified in ISO/IEC 11574.
Call Intrusion (SS-CI) is a supplementary service which, on request from the served user, enables the served 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).
Supplementary service specifications are produced in three stages, according to the method described in CCITI Recommendation I.130. This International Standard contains the stage 1 and stage 2 specifications of SS-CI. The stage 1 specification (clause 6) specifies the supplementary service as seen by users of PISNs. The stage 2 specification (clause 7) identifies the functional entities involved in the supplementary service and the information flows between them.
| SDO | ISO: International Organization for Standardization |
| Document Number | ISO/IEC 14845 |
| Publication Date | Not Available |
| Language | en - English |
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| Committee | ISO/IEC JTC 1/SC 6 |