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首页> 外文期刊>Bell Labs technical journal >Issues in Supporting Multimedia Services in SIP Networks with Mixed Endpoint Types
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Issues in Supporting Multimedia Services in SIP Networks with Mixed Endpoint Types

机译：在具有混合端点类型的SIP网络中支持多媒体服务的问题

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摘要

The evolution from traditional circuit-based networks to packet-based networks is a salient feature of today's telecommunications industry. As new types of Session Initiation Protocol (SIP) networks and endpoints (e.g., 3rd Generation Partnership Project Internet Protocol Multimedia Subsystem [3GPP IMS], cable, public switched telephone network [PSTN] gateways, and 802.11-capable personal digital assistant [PDAs]) are introduced, SIP extensions are being introduced to solve the problems unique to each of them. As SIP networks mature to support mixed endpoint types, interesting issues relating to interoperability among the various endpoints arise. This paper includes a discussion of some of these issues, including out-of-band versus in-band call progress information, handling early media, support of Internet Protocol (IP) and asynchronous transfer mode (ATM) transport networks, interworking with ISDN User Part (ISUP), and support of different SIP extensions. It also explores issues of performance, reliability, and service quality that arise as networks serving mixed endpoints are deployed.
机译：从传统的基于电路的网络到基于分组的网络的演进是当今电信行业的显着特征。作为新型的会话发起协议（SIP）网络和端点（例如，第三代合作伙伴计划Internet协议多媒体子系统[3GPP IMS]，电缆，公用电话交换网[PSTN]网关和具有802.11功能的个人数字助理[PDA]） ），SIP扩展，以解决每个扩展所独有的问题。随着SIP网络逐渐成熟以支持混合端点类型，出现了与各个端点之间的互操作性有关的有趣问题。本文讨论了其中一些问题，包括带外与带内呼叫进度信息，处理早期媒体，支持Internet协议（IP）和异步传输模式（ATM）传输网络，与ISDN用户互通。部分（ISUP），并支持不同的SIP扩展。它还探讨了在部署服务于混合端点的网络时出现的性能，可靠性和服务质量问题。

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