ISO/IEC 17343:2007 信息技术 系统间远程通信和信息交换 企业远程通信网络 QSIG与SIP间的信令互通 基本业务

标准编号：ISO/IEC 17343:2007

中文名称：信息技术 系统间远程通信和信息交换 企业远程通信网络 QSIG与SIP间的信令互通 基本业务

英文名称：Information technology — Telecommunications and information exchange between systems — Corporate telecommunication networks — Signalling interworking between QSIG and SIP — Basic services

发布日期：2007-11

标准范围

ISO/IEC 17343:2007规定了QSIG和会话发起协议(SIP)之间的信令互通，以支持公司电信网络(CN)(也称为企业网络)内的基本服务。QSIG是在专用综合业务网络(PISN)内的专用综合业务网络交换机(PINX)之间操作的信令协议。PISN向其用户提供电路交换基本服务和补充服务。QSIG在其他标准中有规定。注意QSIG这个名称来源于它用于Q参考点的信令。Q参考点是两个引脚之间的分界点。SIP是用于建立、终止和修改多媒体会话的应用层协议。它通常通过IP进行。电话呼叫被认为是一种仅交换音频的多媒体会话。随着企业网络内对电话的支持从电路交换技术发展到互联网技术，这两种技术将在许多网络中共存一段时间，也许是几年。因此，需要能够建立、修改和终止涉及SIP网络中的参与者和QSIG网络中的参与者的会话。这样的呼叫由在SIP和QSIG之间执行互通的网关支持。ISO/IEC 17343:2007规定了用于基本服务的SIP-QSIG信令互通，所述基本服务为采用QSIG的PISN和采用SIP的公司IP网络之间的语音、DTMF、传真和调制解调器媒体提供双向传输能力。互通的其他方面，例如。g.RTP和SDP的使用将根据相关介质的类型而有所不同，并且超出了ISO/IEC 17343:2007的范围。支持补充服务的呼叫相关和呼叫无关信令超出了ISO/IEC 17343:2007的范围，但是对某些补充服务（例如，呼叫转移、呼叫转移）的支持可能是未来工作的主题。QSIG和SIP之间的互通允许在PISN的用户处发起的呼叫在公司IP网络的用户处终止，或者在公司IP网络的用户处发起的呼叫在PISN的用户处终止。采用QSIG的PISN和采用SIP的公共IP网络之间的互通超出了ISO/IEC 17343:2007的范围。然而，ISO/IEC 17343:2007中规定的功能在与其他相关功能(例如。ISO/IEC 17343:2007适用于可以充当采用QSIG的PISN和采用SIP的公司IP网络之间的网关的任何互通单元。

ISO/IEC 17343:2007 specifies signalling interworking between QSIG and the Session Initiation Protocol (SIP) in support of basic services within a corporate telecommunication network (CN) (also known as enterprise network).

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 and supplementary services to its users. QSIG is specified in other Standards.

NOTE The name QSIG was derived from the fact that it is used for signalling at the Q reference point. The Q reference point is a point of demarcation between two PINXs.

SIP is an application-layer protocol for establishing, terminating, and modifying multimedia sessions. It is typically carried over IP. Telephone calls are considered a type of multimedia session where just audio is exchanged.

As the support of telephony within corporate networks evolves from circuit-switched technology to Internet technology, the two technologies will coexist in many networks for a period, perhaps several years. Therefore, there is a need to be able to establish, modify, and terminate sessions involving a participant in the SIP network and a participant in the QSIG network. Such calls are supported by gateways that perform interworking between SIP and QSIG.

ISO/IEC 17343:2007 specifies SIP-QSIG signalling interworking for basic services that provide a bi-directional transfer capability for speech, DTMF, facsimile, and modem media between a PISN employing QSIG and a corporate IP network employing SIP. Other aspects of interworking, e.g., the use of RTP and SDP, will differ according to the type of media concerned and are outside the scope of ISO/IEC 17343:2007.

Call-related and call-independent signalling in support of supplementary services is outside the scope of ISO/IEC 17343:2007, but support for certain supplementary services (e.g., call transfer, call diversion) could be the subject of future work.

Interworking between QSIG and SIP permits a call originating at a user of a PISN to terminate at a user of a corporate IP network, or a call originating at a user of a corporate IP network to terminate at a user of a PISN.

Interworking between a PISN employing QSIG and a public IP network employing SIP is outside the scope of ISO/IEC 17343:2007. However, the functionality specified in ISO/IEC 17343:2007 is in principle applicable to such a scenario when deployed in conjunction with other relevant functionality (e.g., number translation, security functions, etc.).

ISO/IEC 17343:2007 is applicable to any interworking unit that can act as a gateway between a PISN employing QSIG and a corporate IP network employing SIP.

标准预览图