Portable keyboard operated telecommunications system
作者： Gary G. Voget , John M. DeFino , Rufus Coomer , John W. Stannard
DOI:
关键词: Telecommunications 、 Terminal (telecommunication) 、 Baudot code 、 Alphanumeric 、 Transmission (telecommunications) 、 Mode (computer interface) 、 ASCII 、 Computer science 、 Computer hardware 、 Telephone line 、 Character (computing)
摘要: A portable handheld battery operated telecommunications terminal (10) is acoustically coupled to a telephone hand set for the transmission and reception of alphanumeric information over ordinary lines. standard typewriter ASCII keyboard (34) enables encoding messages on character by basis (Baudot code) or entire message second communications with same protocol. visual display (32) provides data editing encoded prior received from (10). microprocessor (50) programmed processor instructions stored in EPROMs (66) (68) controlling operation entries (34). transmit audio transducer (76) receive (84) tones lines frequency shift key mode response pulses (50). Random access memories (62) (64) enable user store an transmission, enter blocks subsequent redisplay (32).
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