Direct Dialling In (Ddi) - Panasonic KX-T7400 Series User Manual Addendum

3.1 System Management

Direct Dialling In (DDI)

Allows the external caller to connect to an extension in the system directly. Assignable
destinations are: operator, extension, or extension group. This requires a DDI number
transmitted from the ISDN network. The DDI number is converted to a specific extension
number by using a pre-programmed conversion table.
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.
Extension21
(DDI:111)
(CLIP/COLP:555-4111)
(DDI:112)
(CLIP/COLP:555-4112)
(DDI:113)
(CLIP/COLP:555-4113)
• You can store a DDI number (20 digits maximum) by System Programming.
!
!
• To reach an extension group, the group must have been previously stored by System
Programming.
• If a wrong number is entered, the call will be transferred to the operator.
• It is possible to use DND on a DDI call if the Class of Service permits.
• ISDN Port Programming (Section 3.7)
[404] CLIP / COLP Number Assignment
[405] Direct Dialling In
[412] ISDN DDI Number/Extension Number Transformation
• COS Programming (Section 3.8)
[510] Do Not Disturb for Direct Dialling In Call
• Optional Programming (Section 3.12)
[902] System Additional Information,
[903] Received Number Check
40
22
23
Area 1 – Field (04)
DSHS
ISDN
112
DDI Number
SLT ISDN-T
Network
External telephone
555-4112
PT