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ICX (International), issued March/1998
ICX-35-700
Chapter 3. System Features
Section 700 - Operation
Hardware Requirements
•
N/A
Considerations
•
N/A
Direct Inward System Access
(All Versions)
Description
Direct Inward System Access (DISA) gives off-site users dial-in access to the System. You access
DISA from an outside location by entering a digit number assigned to a DISA trunk.
For security reasons, sixteen incoming DISA ID codes/Toll Restriction Service (TRS) (Call Barring)
class can be assigned. If a code is assigned, it must be entered as soon as the DISA trunk answers.
Operation
To make a DISA call to an extension:
To make a DISA call to an outside number:
Hardware Requirements
•
N/A
Considerations
•
Busy override cannot be used for a DISA line.
•
DISA can be used to access extensions as well as outside numbers.
Action
Result
1. From an outside location, enter the DISA trunk number.
DISA dial tone
2. If an incoming DISA code is assigned enter the DISA code
(up to 10 digits). Otherwise, proceed to step 3.
3. Dial the extension number.
Action
Result
1. From an outside location, enter the DISA trunk number.
DISA dial tone
2. If an incoming DISA code is assigned enter the DISA code
(up to 10 digits). Otherwise, proceed to step 3.
3. Enter the trunk group number (9 [UK/HK], 0 [Taiwan, Indo-
nesia, Malaysia], or 81-84)
4. Dial the phone number.
