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Principal Sponsors:
 | Hybrid Fiber Coaxial (HFC) Telephony |
11. Emerging Capabilities
Cable Data Modem
As the demand for high-speed data communication grows, sophisticated HFC systems are offering Ethernet access over cable. A 10BaseT interface connects a PC to the modem. The modem can either be a stand-alone unit, in which case it attaches to the network using a standard F-connector, or it can be mounted within a service unit. As with other components of the HFC network, cable-data modems will provide maximum flexibility if they come in a range of data speeds that can be matched to the application.
Wireless Services
Several technologies show promise for delivery of telephony services to homes and to mobile subscribers. These include multipoint multifrequency distribution service (MMDS), wireless local loop, and personal communication services (PCS). MMDS will provide interactive video, telephony, and data services across wide-area networks. Wireless local loop offers architectural options suitable for either mobile or fixed telecommunications applications. In mobile applications, remote antenna driver (RAD) technology provides a low-cost alternative to towers. Using a common optical architecture offers an alternative to building out coaxial facilities.
PCS is an emerging 1.8- and 1.9-GHz wireless service. It can be implemented in either centralized or distributed configuration. This flexible, standard-based technology can be used with equipment from many suppliers and supports both time division multiple access (TDMA) and code division multiple access (CDMA) modulation schemes. It offers network providers the option of providing PCS service or selling transport to a third-party provider.
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