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D
Feature References
Operation References
D
irect Dialing In (DDI)
Description
Conditions
Connection References
3-50
Features
[404] DTMF Time
[990] System Additional Information, Fields (17), (21)
Section 3, Features,
End-to-End DTMF Signaling
(Tone Through)
Not applicable.
Provides an automatic direction of an incoming ISDN S0 line call
to a specific extension. This requires a DDI number informed from
the ISDN network. The DDI number is converted to a specific
extension number by using a pre-programmed conversion table.
@ @ @ @Extension
200
(DDI:111)
201
(DDI:112)
202
(DDI:113)
Explanation
1. An incoming call from the ISDN network reaches your DSHS
(Digital Super Hybrid System).
The ISDN network informs DSHS of the DDI number.
2. DSHS converts the DDI number to an extension number and
directs the call to the extension.
• The DDI service can be enabled or disabled on a CO line basis.
• After the extension number is determined, the system operates the call
in the same way as the DIL 1:1 operation.
• If a DDI number cannot be converted to an extension number, the call is
put to IRNA destination.
Section 2, Installation,
2.4.2 CO Line Connection (KX-TD1232 : CO 1 through CO 8)
2.4.7 2-ISDN S0 Line Unit Connection
3
Pulse to Tone Conversion
DSHS
Network
ISDN
555-4112
DDI number
Features
External
telephone
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