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Trunk Line and Station Line Assignment
1. The DX-408 / 408I systems automatically assigns station and line ports.
2. Trunk numbers for both systems are assigned 71 to 74, and station numbers are assigned 21
to 28.
3. For the DX-408i digital key system, 2 channels of the second BRI port (CO3&4 / BRI2
line) can be used either as trunks or ISDN extensions. The latter results in 71 and 72 being
the 2 ISDN trunks and 73, 74 being the ISDN extensions.
Below is a summary of the numbers assigned to the DX-408/DX-408i digital key system ports:
Port
Trunk Port
DLI Port(1~4)
SLI Port(1~4)
CO1.2/BRI1 : 71~72
CO3.4/BRI2 : 73~74 (*With DX-408i digital key system, this line can
be used 2 ISDN extensions with the same port
numbers).
21~24
25~28
Number
2-25
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