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TTNew, TT92 & TT21 [and more]

Digital/TEC definition

of

TTNew, TT92 & TT21 [and more]

from

Tunstall Healthcare (UK) Ltd

Tunstall

A range of legacy Tunstall tone-based signalling protocols. Each generation of these protocols extended the capability of the former. TTNew was widely adopted (and copied) by other suppliers but is quite limited in its call presentation abilities. TT92 & TT21 are proprietary protocols although there has been some limited release under license.

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TTNew, TT92 & TT21 [and more]

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