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VCO telephone calls must be made through a relay service. This connection allows the person with the hearing loss to speak to the other party and read their incoming message on the telephone's display screen. There is also a portable VCO device, which can be attached to cell phones, pay phones, or cordless phones.
A Phone of Our Own: the Deaf Insurrection Against Ma Bell. Washington, D.C.: Gallaudet University Press. ISBN 978-1-56368-090-8. OCLC 59576008. Strauss, Karen Peltz (2006). A New Civil Right: Telecommunications Equality for Deaf and Hard of Hearing Americans. Washington, D.C.: Gallaudet University Press. ISBN 978-1-56368-291-9. OCLC 62393257
A typical relay service conversation. A telecommunications relay service, also known as TRS, relay service, or IP-relay, or Web-based relay service, is an operator service that allows people who are deaf, hard of hearing, deafblind, or have a speech disorder to place calls to standard telephone users via a keyboard or assistive device.
Two cordless telephones 3 VTech cordless landline phones A Panasonic KX-TG2226B 2.4GHz cordless phone with answering machine. A cordless telephone or portable telephone has a portable telephone handset that connects by radio to a base station connected to the public telephone network. The operational range is limited, usually to the same ...
A hearing aid and a telephone are "compatible" when they can connect to each other in a way that produces clear, easily understood sound. The term "compatibility" is applied to all three types of telephones (wired, cordless, and mobile). There are two ways telephones and hearing aids can connect with each other:
James Carlyle Marsters (April 5, 1924 – July 28, 2009) was a deaf orthodontist in Pasadena, California, who in 1964 helped invent the first teletypewriter device capable of being used with telephone lines.