textphone การใช้

A textphone service is available on 18001 101 for those who are deaf, hard-of-hearing or speech-impaired.
For those who are deaf or hard of hearing, there was a textphone service available on "'0845 606 4647 " '.
It is provided by a team that answers a range of disability-related queries of members by phone, email, textphone, post or online.
During the 1980s it developed the Telephone Exchange for the Deaf, a pioneering relay service allowing telephone users and deaf " textphone " users to communicate with each other using a third-party operator to relay voice and text communication.
It is both an umbrella protocol that allows recognition and interoperability of some of the most commonly used textphone protocols, as well as offering a native V . 18 mode, which is an ASCII full-or half-duplex modulation method.