AT&T DEFINITY 2500 series Bedienerhandbuch Seite 66

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FEATURE DETERMINATION
TABLE F (continued).
Features Requiring Additional Hardware and/or Software
Feature
Visually-Impaired Atten -
dant Service
Hardware and/or
Software
Required
Requires the TN457 Voice (or Speech) Syn -
thesizer circuit pack for English-speaking
countries and the TN433 Voice (Speech)
Synthesis circuit pack for Italian-speaking
Actual
Hardware and/or
Software Needed
countries.
Voice Message Retrieval
Voice Terminal Display
A Voice (Speech) Synthesizer circuit pack
(see Table Q for the correct circuit pack for
each country). Each circuit pack has four
ports to provide Voice Message Retrieval.
Traffic Engineering is required to determine
the number of circuit packs.
A display-equipped voice terminal and one
port on a TN754B Digital Line circuit pack
for DCP services. See ‘ISDN-BRI” in this
table for ISDN-BRI requirements.
56
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