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Definity TN429D DIOD (Direct Inward/Outward Provides 8 ports for direct
inward/outward dialing (DIOD) trunks.
Each port provides a 2-wire interface
to the central office (CO) public exchange for incoming and outgoing
calls. CO provides caller names and numbers to the TN429D,
which displays the on Definity digital voice terminals (DCP and BRI)
equipped with a 32 or 40 character alphnumeric display and with System
25/Merlin 7315H and 7317H terminals supported by Definity.
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