| Publication CODE |
Title |
| ISO/IEC 15991:2003 (2003-03) |
INFORMATION TECHNOLOGY -- TELECOMMUNICATIONS AND INFORMATION EXCHANGE BETWEEN SYSTEMS -- PRIVATE INTEGRATED SERVICES NETWORK -- SPECIFICATION, FUNCTIONAL MODEL AND INFORMATION FLOWS -- CALL PRIORITY INTERRUPTION AND CALL PRIORITY INTERRUPTION PROTECTION SUPPLEMENTARY SERVICES |
| |
| Price Excl. VAT |
Total number of pages, tables and drawings |
|
183.00 €
|
42. |
Description
ISO/IEC 15991:2003 specifies the Supplementary Services Call Priority Interruption (SS-CPI) and Call Priority Interruption Protection (SS-CPIP), which are applicable to various basic services supported by Private Integrated Services Networks (PISN). Basic services are specified in ISO/IEC 11574.
NOTE This edition of ISO/IEC 15991 does not apply to the circuit-mode Multiple Rate Bearer Service.
SS-CPI is a supplementary service that allows a call request for a priority call to proceed successfully in the case that there is no user information channel available. This is accomplished by force releasing an established call of lower priority.
SS-CPIP is a supplementary service that allows for the protection of calls against interruption from other, priority, calls.
SS-CPI and SS-CPIP are described separately because SS-CPI is a service used by a calling user, and SS-CPIP is a service used by either a calling user or a called user.
Supplementary service specifications are produced in three stages, according to the method described in ETS 300 387. ISO/IEC 15991:2003 contains the stage 1 and stage 2 specifications of SS-CPI. The stage 1 specification (clause 6) specifies the general feature principles and capabilities. The stage 2 specification (clause 7) identifies the Functional Entities involved in the supplementary service and the information flows between them.
|
| Class |
C990
(IEC PUBLICATIONS IEC PUBLICATIONS)
|
| Status |
IEC PUBLICATION |
| Situation |
Currently active
|
|
| Committee |
ISO/IEC JTC 1/SC 6
TELECOMMUNICATIONS AND INFORMATION EXCHANGE BETWEEN SYSTEMS
|
| BEC Approval |
2003-03-21 |
| ICS-Code (International Standards Classification) |
33.040.35
|
| NBN Status |
New |
|
| IEC publication date |
2003-03-21 |
| IEC last modification date |
2014-04-14 |
|
