cluding haptic features. Now, of the five senses (hearing, sight, taste, touch, and smell), only the first two are used for the Internet, the rest will appear progressively. This multimodality will be interactive to achieve the maximum level of collaboration among users. To accomplish this new featured content, the network should be content- and service-centric, regardless of the location of the end user, and must trans- port real-time 3D multi-modal media to multi-functional devices. SIP decouples the media from the signaling, and if the network is able to transmit this media, SIP can signal it. The underlying idea is because SIP uses companion protocols to perform its functions, and if, up until now, SIP used SDP to transport media information, in the future, it will be SDPng with embedded XML that provides this function, with an evolution of MPEG-21 performing a five-senses-content-exchange-framework, for example. On the other hand, the capacity of networks has grown during recent years. New generations of optical networks are enabling many different services that until now were not accessible to users. Video engineers need to transmit video signals, such as plugging wires locally, and users want to consume this studio- quality video in cultural events or health scenarios. SIP can provide the sig- naling framework for the transmission of these standardized digital interfaces, such as HDSDI, SDTI, SDI, and Firewire (IEEE 1394), even if the trans- port of these signals is carried out by a new media network architecture (see Figure 2.13). In this case, SIP would be able to signal these current and future media contents, due to its decoupled nature from media. In the case of SIP the major involvement would emerge, since IP addresses, routing, and DNS names, among others, are closely tied to an underlying structure evolving to a clean-state Internet [27]. Serial digital in/out interfaces Media layer Destination Source address address Payload Lower layers PHY layer FIGURE 2.13 New media architecture and its signalin