Wireless cable, also called fixed wireless broadband, is emerging as a legitimate local access platform for the delivery of high-quality digital data, video and voice services. Like their cable competitors, wireless operators are increasingly using their spectrum to offer high-speed Internet services. Just like wired cable, a 6 MHz wireless television channel can support 27 Mbps of downstream data throughput using cable modems with 64 QAM (quadrature amplitude modulation) technology. Historically, a telephone-return path has been used for …
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…MDS, MMDS and ITFS spectrum for upstream and downstream broadcasts. A number of operators are trialing two-way services and PCTV is now offering two-way wireless cable modem service commercially in Phoenix. Upgrading wireless cable systems to support two-way transmission is technically challenging, as it requires operators to convert broadcast television systems into networks that more closely resemble a cellular telecommunications platform. Additionally, a "transverter" must be added at the customer premise to transmit data upstream.