s moving at over 250 mph (400 kph). (DVB-T can only support SDTV on moving vehicles, and ATSC cannot be used on moving vehicles at all.) ISDB-T is applicable to all 6MHz, 7MHz, and 8MHz band- width systems, so it could be adopted worldwide. ISDB-Tsb refers to the terrestrial digital sound broadcasting specifica- tion and is the same technical specification as ISDB-T. ISDB-Tsb can also be used for mobile reception. The Broadband Infrastructure ISDB-C (digital cable TV)-ISDB-C is the cable digital broadcasting speci- fication. It supports terrestrial digital broadcasting services over cable using the OFDM scheme with a 6MHz channel. It employs 64-QAM modulation. 2.6GHz band (mobile broadcasting)-The mobile broadcasting 2.6GHz band uses Code Division Multiplexing (CDM). A Japanese company named MobaHO! began using mobile broadcasting in October 2004, constituting the world's first satellite digital multimedia broadcasting for personal and mobile device use. Users throughout Japan can listen to and view the same programs from 30 audio channels (including overseas FM radio and genre- specific music programming) and from 7 video channels (including news, sports, and entertainment programming). All these standards are based on MPEG-2 video and audio coding and are capable of HDTV. Brazil is currently the only country considering adopting ISDB-T for its DTV standard. The Broadband Infrastructure We are in an era of new networks that we loosely term next-generation networks. Data traffic in these networks is equal to or surpassing voice as the most mission- critical aspect of the network. Remember that when all the traffic is ones and zeros, everything is data, and voice is just another data application. Integration of voice, data, and video without protocol conflicts greatly simplifies the migration of legacy communication systems and network applications to next-generation transport technologies. The undeniable appeal of interactive multimedia applications, con- tent, and programming also signals the need for a converge