Telephonic communications – Reception of calling information at substation in wireline... – Blocking caller id transmission
Patent
1995-10-10
1998-08-18
Loomis, Paul
Telephonic communications
Reception of calling information at substation in wireline...
Blocking caller id transmission
379 9305, 379199, 379372, H04M 156, H04M 1506, H04M 166
Patent
active
057968101
ABSTRACT:
An apparatus for providing a convenient and flexible way for a user to dial a block code which allows the user to withhold his/her identity and telephone number when the user makes a phone call. By programming different operation modes using the keys when the apparatus is in an on-hook status, the user may elect to have a block code dialed by manually pressing a block key when desired, or to have a prompt message displayed on the screen to remind him/her to press a key to dial the block code, if so desired, when the phone is off-hook, or to have the block code auto-dialed every time the phone is off-hook. When the apparatus is in an automatic block code dialing mode, the user may override this setting and have his/her caller ID sent on a per call basis. Another aspect of the invention is a circuit arrangement which is capable of reducing the speech/voice interference to the call waiting caller-ID-alert signal during normal telephone conversation, thus improving the chance of a successful caller ID data transmission during call waiting.
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Schwartz, Barry K., "The Analog Display Services Interface," IEEE Communications Magazine, vol. 31, No. 4, Apr. 1, 1993, pp. 70-75.
Lim Boon Chen
Lim Yeung How
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