Ip-relay

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.

Originally, relay services were designed to be connected through a TDD, teletypewriter (TTY) or other assistive telephone device.

Services gradually have expanded to include almost any real-time text capable technology such as a personal computer, laptop, mobile phone, PDA, and many other devices.

External Links

• Telecommunications relay service @ Wikipedia