Telephonic communications – Including aid for handicapped user
Patent
1994-11-29
1996-09-24
Chan, Jason
Telephonic communications
Including aid for handicapped user
379201, H04M 1100, H04M 342
Patent
active
055598560
ABSTRACT:
A system and method are disclosed for recognizing and routing telephone call activity involving a hearing or speech impaired person. A long distance party is called direct using standard 1+ calling. The call is routed to a switching network which contains a trigger table of hearing or speech impaired customers. This switch compares the caller's Automatic Number Identification (ANI) and the called party's Dialed Long Distance Number (DLN) with the information contained in the trigger table to determine whether the caller or the called party are hearing or speech impaired. This same switch can also query a Universal Subscriber Data Structure database using the caller's ANI and the called party's DLN to obtain the parties' profiles. Based upon the existence of either the caller's ANI or the called party's DLN in the foregoing trigger table, the call is routed to an adjunct which connects the call to an appropriate AT&T Operator Services for the Deaf (OSD) or Telecommunications Relay Services (TRS) center. At the center, the conversation can then be relayed between the hearing or speech impaired party and the voice party. During this time, the adjunct can monitor the call for a particular subscriber's feature interaction and route the call to an appropriate switch in the network based on the feature invoked by that party. A second database connected to the adjunct can verify feature subscriptions. Moreover, an X.25 query protocol between the adjunct and the switching network can be used to perform calling card validation.
REFERENCES:
patent: 4577066 (1986-03-01), Bimonte et al.
patent: 5121421 (1992-06-01), Alheim
patent: 5289523 (1994-02-01), Vasile et al.
patent: 5396536 (1995-03-01), Yudkowsky
Chan Jason
Lucent Technologies - Inc.
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