Telecommunication device for the deaf with automatic...

Details Telecommunication device for the deaf with automatic... Telecommunication device for the deaf with automatic...

H - Electricity

04

M

H04M 11/06 (2006.01) G06F 13/38 (2006.01) H04M 11/04 (2006.01)

Patent

CA 2113841

A telecommunication device for the deaf (12, 14, 16, 20, 22, 24, 26, 28) includes a self-identification sequence which auto- matically commences upon the initiation of communication with the device. The self-identification sequence consists of a series of characters which may be separated by pauses and the device listens during the pauses to see if TDD communication has been established. The purpose of the character string is so that a receiving station can identify, with a low rate of error, a calling TDD and therefore switch the incoming call to a TDD equipped operator. This capability is particularly useful for emergency service operators (911 services) which must be able to handle incoming TDD calls with a maximun of efficiency and a minimum of error.

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