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从1982年起,模拟的CT_1无绳电话产品,诸如BT(British Telecom)的‘Freeway’,已经在英国住宅市场上应用.最近,英国工商部批准四家运营者采用数字CT_2技术提供公众无绳电话服务(Telepoint Service),并且很快CT_2产品将可以在商业市场[如无线电话用户交换机(Wireless PBXs)]和家庭中应用.由于CT_2公共空中接口(CAI)规范的引入,使得用户可以在以上三种应用中使用同一手机.本文概括地描述了CAI规范的各个组成部分,并且举例说明了CT_2手机经无线键路至基站(和相反方向)的呼叫建立过程.
Analog CT_1 cordless telephony products such as Freeway, BT (British Telecom), have been in use in the UK residential market since 1982. Recently, the UK’s Commerce and Industry Department approved four operators using digital CT_2 technology to provide public cordless telephony services (Telepoint Service), and soon CT_2 products will be available in the commercial market [such as Wireless PBXs] and homes. Due to the introduction of the CT_2 Public Air Interface (CAI) specification, Application uses the same handset.This article outlines the various components of the CAI specification and illustrates the call set-up of a CT_2 handset via a radio link to a base station (and vice versa).