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the network. It will also make it possible to provide new services, such as alternative
billing methods (pay-per-bit, pay-per-session, flat rate, asymmetric bandwidth, and
others). The higher bandwidth of UMTS also promises new services, such as video
conferencing. UMTS promises to realize the Virtual Home Environment (VHE) in which
a roaming user can have the same services to which the user is accustomed when at home
or in the office, through a combination of transparent terrestrial and satellite connections.
The electromagnetic radiation spectrum for UMTS has been identified as frequency bands
1885-2025 MHz for future IMT-2000 systems, and 1980-2010 MHz and 2170-2200 MHz
for the satellite portion of UMTS systems.
Evolution-Data Optimized (EV-DO, EVDO, or 1xEV-DO)
EVDO is a wireless radio broadband data standard adopted by many CDMA mobile
phone service providers. It is standardized by 3GPP2, as part of the CDMA2000 family of
standards. Compared to 1xRTT (CDMA2000 1x) networks, or GPRS and EDGE
networks, 1xEV-DO is significantly faster. (Available in ConnectPort WAN VPN only.)