split between the PTT and the Audiotex to individually record each part description when there may be service provider. many thousands, or even millions of distinct descriptions. As an enhancement to basic Audiotex services, caller details can Whilst not directly being part of a voice processing system there be recorded. This is used in games to identify the winner, or can be is a growing use of fax response systems. These allow the caller to used for telemarketing purposes. A typical telemarketing use would select information using voice processing techniques and then send be to automate the collection, collation and transcription of names out a fax of the required information to the caller. and addresses of callers responding to a television advert. In many cases it would be difficult to speak the information to Here the Audiotex system can be used to collect large numbers of callers, and there is considerable benefit in a fax message being sent. caller details (e.g. names, address and telephone numbers). These details are then transcribed by data entry operators from the voice 37.1.4 Fax responses processing system into computer databases. The benefit of collecting of names and addresses this way is that Fax response systems, when incorporated within a voice processing the peaks of traffic caused by media advertisements are accommo- system, have two basic modes of operation; store and forward on dated 24 hours a day, 365 days a year and can be dealt with when demand and the on line transmission of information constructed for convenient. the particular caller from a database. The first mode is used to make For example, a TV advertisement will generate a peak of traffic a standard document, such as a map, available to a large number of immediately it is shown. To reach the maximum audience, these callers. The second is used to allow caller relevant details to be put adverts will be shown at peak viewing times in the evening, which in to a fax and be sent. Typical applications include faxing of bank is probably o