Title :
Enhanced telephone set on the Inter-IC bus
Author :
Ooi, T.H. ; Lau, K.T.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Inst., Singapore
fDate :
2/1/1990 12:00:00 AM
Abstract :
A microcontroller-based enhanced telephone set designed and developed using the Inter-IC (I2C) bus system is described. Besides functioning as a subscriber telephone, this feature phone incorporates a software-controlled ringer function, pulse and DTMF (dual-tone multifrequency) dialing, redial and extended redial features, direct dialing for emergencies, on-chip memory for 10 repertory dial numbers of 18 digits, direct access repertory dialing, and a liquid-crystal display
Keywords :
telecommunications computer control; telephone sets; DTMF; I2C bus; Inter-IC bus; direct access repertory dialing; direct dialing; dual tone multifrequency dialing; enhanced telephone set; liquid-crystal display; microcontroller based set; on-chip memory; pulse dialing; redial features; software-controlled ringer function; subscriber telephone; Clocks; Design engineering; Flexible printed circuits; Keyboards; Liquid crystal displays; Microcontrollers; Read-write memory; Speech enhancement; Telephony; Transducers;
Journal_Title :
Consumer Electronics, IEEE Transactions on
