TDD

1. telecommunications device for the Deaf.

Example Sentences

The genius of TDD is that nothing happens.

From BBC

RTT, or real-time text, is a mode where people can call deaf and hard-of-hearing people who use a TDD device.

From The Verge

TDDs make a unique sound, so it was easy to know when another TDD user was calling my parents; I would simply place the phone’s receiver on the TDD and tell my parents the call was for them.

From The Verge

Assistance is available in more than 150 languages, and TDD/TYY access is provided for voters with hearing impairments.

From Washington Times

The network, on the 2600 MHz TDD frequency, will be rolled out using technology from Nokia and Ericsson, Cyfrowy Polsat said.

From Reuters