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talking time
- On mobile devices: the maximum duration of an active call connection until the device battery goes flat
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TAPI
- An interface in the ICT system that enables computer-based control of telephony functions to be used
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TFT colour display
- A TFT display is a special kind of LC (liquid crystal) display which is better able to reproduce colours
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TFTP
- A very simply transmission protocol that only supports the reading of or writing to files
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ticket
- A job number (reference), generated during a support request and used to manage communications
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TLS
- Encryption protocol for secure data transfer in the Internet (previously called SSL)