US 11,909,911 B2
System for centralized captioned telephone service
Sungho Lee, Fullerton, CA (US); Wonjae Cha, Yongin-si (KR); and John H. Lee, Culver City, CA (US)
Assigned to MEZMO CORPORATION, Buena Park, CA (US)
Filed by Mezmo Corporation, Buena Park, CA (US)
Filed on Jul. 2, 2021, as Appl. No. 17/367,147.
Prior Publication US 2023/0007121 A1, Jan. 5, 2023
Int. Cl. H04M 3/42 (2006.01); H04M 3/22 (2006.01); G10L 15/26 (2006.01)
CPC H04M 3/42391 (2013.01) [G10L 15/26 (2013.01); H04M 3/2227 (2013.01); H04M 3/42144 (2013.01); H04M 3/42221 (2013.01); H04M 2201/40 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A system for centralized captioned telephone service (“C-CTS”), the system comprising:
a C-CTS system (“C-CTSS”) for providing a transcription service to a user subscribed to the C-CTS during a phone call with a peer;
a mobile communications device of the user which includes a first phone number assigned from a carrier of the user;
a communications device of the peer which includes a second phone number; and
a plurality of caption providers that communicate with the C-CTSS, wherein each of the caption providers provide a captioned telephone service,
wherein the carrier of the first phone number includes a voice network, a data network, and a database that stores the first phone number of the user who is subscribed to the C-CTS, wherein the C-CTSS includes a database that stores the first phone number of the user,
wherein the carrier of the first phone number is configured to route a call, which originated from the first phone number and is directed to the second phone number, to the C-CTSS,
wherein the call includes a call setup message from the carrier, and
wherein the C-CTSS is configured to:
receive the call setup message from the carrier;
add or modify a parameter of the call setup message to a predetermined value during a call setup procedure of the call to prevent the carrier from re-routing the call to the C-CTSS; and
route the call to the carrier of the first phone number, upon receiving the call from the C-CTSS and checking the added or modified parameter, the carrier of the first phone number routes the call to the communications device of the second phone number.