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

Figure 18.3 The decrease in average packet loss over the Internet over 10 years Concerns Regarding Congestion Control Not all re ...

Figure 18.4 Average delays over the Internet We recommend readers interested in this topic check Web sources at the time of read ...

Figure 18.5 Sample of P2P and other Internet traffic A Summary of Internet QoS Technologies Network quality of service is a very ...

Table 18.2 (continued) OPTION FOR HIGHLIGHTS AND NETWORK QOS ISSUES Network Layer RSVP requires state in all nodes in the path. ...

QoS must also sometimes be implemented in private networks that have a wide geographic reach and have bandwidth-starved links to ...

Monitoring QoS for Real-Time Communications The concern with ensuring adequate voice quality within domains has led telephony-mi ...

Summary The proliferation of broadband and high-speed Internet core networks has moved the placement of QoS for voice from the n ...

[8] “RTP Payload Format for the Speex Codec” by G. Herlein et al. Internet Draft, IETF, October 2004. [9] The home page for the ...

317 Applications provided by service providers have some history, and it is remarkable that even in the IP environment, many wir ...

“softswitch” in quotes, since it is mostly a marketing concept to designate the combination of the call agent and media converte ...

Device control protocols are master/slave protocols where every detail of the device operation is controlled from a central serv ...

New features in the slave devices are useless unless they are also supported by the master. This limits the ability to rapidly d ...

of IP gateways to ATM networks and, last but not least, for the control of ATM circuit switches for voice. MEGACO and H.248 are, ...

enterprise networks. The GC is controlled by a call agent (CA), where the ser- vice logic resides, and has access to the necessa ...

The Converged Applications Environment The converged applications environment is based on the distributed Internet and Web archi ...

■■ Service controller for delivery of services in conjunction with special- ized communication servers, as will be shown in the ...

Open protocols are used exclusively. As a consequence, servers can be dis- tributed across the network and can be provided and o ...

The architecture is completely distributed. Internet-style alternate servers using DNS for load distribution provide a high degr ...

Table 19.1 (continued) URI IDENTITY EXAMPLE SCHEME 1 EXAMPLE SCHEME 2 EXAMPLE SCHEME 3 Retrieve - SIP authentication sip:sub-rjs ...

The causeparameters can indicate to the caller or to a service component where to redirect the call and what operations to perfo ...