TDD

1. telecommunications device for the Deaf.

Example Sentences

The genius of TDD is that nothing happens.

Read more on BBC

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

Read more on 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.

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

Read more on Washington Times

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

Read more on Reuters