Detection of TDD signals in an automated telephone system

Details Detection of TDD signals in an automated telephone system Detection of TDD signals in an automated telephone system

1994-10-17

1996-01-02

Chan, Wing F.

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

379 52, 379386, H04M 1100

Patent

active

054815894

ABSTRACT:
An automatic telephone answering system employs a switch activated by any of several techniques to select a language for communication with a caller. A single matrix determines the content of a message to be generated in response to input from the caller. A single matrix can be used because it is arranged in accordance with the content of the various messages and not on the specific language of the messages. All of the messages for each respective language are stored in a separate directory such that a given identifier obtained from the matrix will recall that message in the language determined by identification of the particular directory. A telecommunications device for the deaf (TDD) is treated in the same manner as a language and selection of messages employs the same matrix used for traditional languages. Received TDD signals are converted to ASCII for storage, and messages to be identified by the matrix are stored in ASCII and converted to TDD before transmission. Digital signal processing (DSP) techniques are used to recognize the transmission of TDD signals by a caller.

REFERENCES:
patent: 3153121 (1964-10-01), Crabtree et al.
patent: 3199226 (1965-08-01), Joslow
patent: 3896267 (1975-07-01), Sachs et al.
patent: 4013967 (1977-03-01), Fassbind
patent: 4181813 (1980-01-01), Marley
patent: 4365315 (1982-12-01), Jamnik
patent: 4420656 (1983-12-01), Freeman
patent: 4523055 (1985-06-01), Hohl et al.
patent: 4604063 (1986-08-01), Gurmarnik
patent: 4608457 (1986-08-01), Fowler et al.
patent: 4615002 (1986-09-01), Innes
patent: 4633777 (1987-05-01), Szeto
patent: 4635199 (1987-06-01), Muraki
patent: 4700322 (1987-10-01), Benbassat et al.
patent: 4701943 (1987-10-01), Davis et al.
patent: 4712189 (1987-12-01), Mohri
patent: 4716583 (1987-12-01), Groner et al.
patent: 4769642 (1988-09-01), Davis
patent: 4790003 (1988-12-01), Kepley et al.
patent: 4803312 (1989-02-01), Britos
patent: 4809577 (1989-06-01), Fujita
patent: 4811379 (1989-06-01), Grandfield
patent: 4813019 (1989-06-01), DeBell
patent: 4837689 (1989-06-01), Tanaka et al.
patent: 4849966 (1989-07-01), Willis et al.
patent: 4866755 (1989-09-01), Hashimoto
patent: 4959847 (1990-09-01), Engelke et al.
patent: 4996707 (1991-02-01), O'Malley et al.
patent: 5016220 (1991-05-01), Yamagata
patent: 5121421 (1992-06-01), Alheim
patent: 5163081 (1992-11-01), Wycherley et al.
patent: 5325417 (1994-06-01), Engelke et al.
patent: 5388146 (1995-02-01), Morduch et al.
"News Bytes", Telephony, Jul. 1, 1991, p. 14.
Fike et al., "Understanding Telephone Electronics", pp. 242, 243, .RTM.1984.
Instruction Manual, "Communicating With Your Superprint ES", Ultratec, Inc. (1988).
Disk Operating System Version 2.10, IBM/Microsoft User Manual (1983) pp. 2-35.
R. L. Smith, "Baudot to ASCII", Radio Electronics, Apr. 1976, pp. 57-59, 82, 83, 86.
"Telesonic Offers TDD Capabilities: Improves Access For Hearing Impaired", Voice Technology News, Jun. 18, 1991, pp. 4-5.

Affiliated with

Also associated with

Rating

Detection of TDD signals in an automated telephone system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Detection of TDD signals in an automated telephone system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of TDD signals in an automated telephone system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-241981