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TIMESTAMPS
The Wayback Machine - https://web.archive.org/all/20050209213744/http://usatalkcheap.com:80/telecom-glossary-t3.html
Telecom Glossary T3
Telecommunications Relay Service (TRS)
A free service that enables persons with TTYs, individuals
who use sign language and people who have speech
disabilities to use telephone services by having a
third party transmit and translate the call.
Telephony
The word used to describe the science of transmitting
voice over a telecommunications network.
TTY
A type of machine that allows people with hearing or
speech disabilities to communicate over the phone
using a keyboard and a viewing screen. It is sometimes
called a TDD.
TCP/IPTransmission Control Protocol/Internet
Protocol - networking protocol used to connect network
hosts, even with computers with very different hardware
architectures and operating systems; network protocol
of the Internet.