摘要 |
The present invention concerns a public telephone using inductive card debiting comprising, besides the microprocessor traditionally made use of in this kind of telephone set, a subsidiary processor for carrying out some of the functions previously performed by said microprocessor, comprising interruption pre-processing, the interfacing with the keyboard, the generation of auxiliary tones and various timer functions. |
申请人 |
TELECOMUNICACOES BRASILEIRAS S/A - TELEBRAS;PISANI, CARLOS, ALBERTO;DI GIORGIO, ROSANA, CERON;GONCALVES, LUIZ, CARLOS;DOS SANTOS, GILDEMAR |
发明人 |
PISANI, CARLOS, ALBERTO;DI GIORGIO, ROSANA, CERON;GONCALVES, LUIZ, CARLOS;DOS SANTOS, GILDEMAR |