Patent ID: 9614913
Date: 2017-04-04
CPC Classifications: H04L,H04M

Claim:
1. A method of providing TTY services in a vehicle, comprising the steps of: establishing a cellular link between a vehicle telematics unit and a wireless carrier system, wherein the telematics unit is configured for cellular communication according to a first telecommunication standard using a first chipset and according to a second telecommunication standard using a second chipset; identifying at the telematics unit a TTY device near or within the vehicle; receiving at the telematics unit an indication that the TTY device is in an enabled state, wherein the enabled state indicates that a vehicle user desires to use the TTY device; in response to receiving the indication, switching at the telematics unit from communicating with the wireless carrier system via the second telecommunications standard to communicating with the wireless carrier system via the first telecommunications standard; and transmitting a TTY message from the telematics unit via the first telecommunications standard.