Internet Communications Using SIP : Delivering VoIP and Multimedia Services With Session Initiation Protocol {2Nd Ed.}

Two types of services have been standardized for RSVP: Controlled load, (which offers service with QoS equal to that of the unlo ...

■■ MPLS is only applicable in the core of the network where no QoS ser- vices are required due to the ample bandwidth, but is no ...

Media Transport Using RTP The RTP document, RFC 3550 [17] consists of the following: ■■ RTP for media packet transport ■■ The RT ...

■■ Lost packets reported as a fraction of the total and as a cumulative number. ■■ Highest sequence number received. ■■ Inter-ar ...

Multimedia Server Recording and Playback Control The Real-Time Streaming Protocol [20] is an application level protocol for the ...

Authentication and Key Distribution Messages used by the protocols in the Internet multimedia conferencing archi- tecture can be ...

[7] “An Analysis of Live Streaming Workloads on the Internet” by K. Sripanidkulchai, B. Maggs, and H. Zhang. Proceedings of the ...

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97 In this chapter, an overview of the operation of the SIP protocol will be given, followed by a discussion of the basic functi ...

SIP Enabled Network Figure 6.1 shows the elements of a SIP-enabled IP communication network. The network is composed of the foll ...

Figure 6.1 SIP-enabled IP communication network Endpoints and servers benefit from a long list of protocol features of SIP: ■■ W ...

■■ Proxy—SIP proxy servers will forward the request of the user to another server that can provide the requested service, such a ...

Watching How Sausages Are Being Made We believe the style in which SIP has been developed is another feature, equal in importanc ...

What SIP Is Not The virtual explosion in proposals to extend the SIP protocol to solve various problems has resulted in much dis ...

Table 6.1 SIP Methods METHOD DESCRIPTION INVITE Session setup ACK Acknowledgment of final response to INVITE BYE Session termina ...

SIP requests and responses are composed of either the request method or response code, then a list of fields (called headers), w ...

Table 6.3 (continued) LINE DESCRIPTION From: User A <sip:[email protected]> The Fromheader contains a display ;tag=34kd92kfs ...

Elements of a SIP Network There are three main elements in a SIP Network: user agents, servers, and loca- tion services. User Ag ...

Location Services Alocation service is a general term used in RFC 2543 for a database. The data- base may contain information ab ...

Address Resolution Address resolution is one of the most important functions of the SIP protocol. The SIP address resolution pro ...