Terminal Equipment (TE); Narrowband networks (PSTN or ISDN); Access to interactive audio-visual retrieval services without datafacility; Access for ISDN or PSTN videophony terminals to audio-visual databases
终端设备(TE);窄带网络(PSTN或ISDN);在没有数据设施的情况下使用交互式视听检索服务;ISDN或PSTN可视电话终端对视听数据库的访问
This ETS will define the protocol elements for interactive audiovisual retrieval services on narrowband networks without data-facility: Access for ISDN or PSTN videophony terminals to audiovisual databases using Dual Tone Multi Frequency (DTMF). The protocol stack on PSTN access shall be based on ITU-T Recs H.324 and H.245. The protocol stack on ISDN shall be based on ETS 300 144 and ETS 300 145. Details of the protocl stack are given in the documents listed in the Reference documents list. New work item supported by Austrian PTT, France Telecom, KPN, TeleDenmark