标准编号：ISO/IEC 23916:2005
中文名称：信息技术.系统间远程通信和信息交换.企业电信网.QSIG和SIP间信令互通.呼叫转移
英文名称：Information technology — Telecommunications and information exchange between systems — Corporate Telecommunication Networks — Signalling Interworking between QSIG and SIP — Call Transfer
发布日期：2005-11
标准范围
This International Standard specifies call transfer interworking between the Session Initiation Protocol (SIP)and “QSIG” within corporate telecommunication networks (CN), also known as enterprise networks."QSIG" is a signalling protocol that operates between Private Integrated services Network eXchanges (PINX)within a Private Integrated Services Network (PISN). A PISN provides circuit-switched basic services andsupplementary services to its users. QSIG is specified in Standards, in particular [1] (call control in support ofbasic services), [2] (generic functional protocol for the support of supplementary services) and a number ofStandards specifying individual supplementary services. Transfer services are specified in [3], [6] and theQSIG signalling protocol in support of these services is specified in [4], [7]. In particular, this signalling protocolsignals information about call transfer to the users who are involved.NOTE The name QSIG was derived from the fact that it is used for signalling at the Q reference point. The Qreference point is a point of demarcation between two PINXs.SIP is an application layer protocol for establishing, terminating and modifying multimedia sessions. It istypically carried over IP. Telephone calls are considered as a type of multimedia session where just audio isexchanged. SIP is defined in [10].As the support of telephony within corporate networks evolves from circuit-switched technology to Internettechnology, the two technologies will co-exist in many networks for a period, perhaps several years. Thereforethere is a need to be able to establish, modify, terminate and transfer sessions involving participants in theSIP network and participants in the QSIG network. Such calls are supported by gateways that performinterworking between SIP and QSIG.This specification specifies SIP-QSIG signalling interworking for transfer services between a PISN employingQSIG and a corporate IP network employing SIP.
立即下载标准文件