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2.2 Making Calls
50 Operation
2.2.7 Integrated Services Digital Network (ISDN) Service
Access
You can reach the ISDN Key Pad Protocol Service from your extension. The service depends on the
contract with your telephone company.
If your telephone has an ISDN SERVICE button.
If your telephone does not have an ISDN SERVICE button.
• At the end of the procedure, a voice prompt tells you that the acceptance of the service is
completed depending on each Integrated Digital Services Network.
Off-hook.
DPT
Seize an external line
(CO, 9 or 81-83).
OR
to
OR
8
9
1
8 3
Press “ISDN SERVICE” button.
(ISDN SERVICE)
(CO)
DPT
Off-hook. Seize an external line
(CO, 9 or 81-83).
OR
to
OR
8
9
1
8
3
Press FWD/DND
button.
ISDN Service no.
Enter ISDN Service
number (max. 32 digits).
Press FWD/DND
button.
(CO)
FWD/DND FWD/DND
DPT/SLT
Off-hook.
7 2 9
Dial 729 .
ISDN Port no.
Enter ISDN Port
number (1, 2 or 3).
Wait for
5 seconds.
ISDN Service no.
Enter ISDN Service
number (max. 32 digits).