Aastra DT390 - Direct Inward System Access (DISA); Tandem Configuration

DT390
Valid digits 0-9. Internal dial tone. Make the external call.
15.3 Direct Inward System Access (DISA)
If you are working externally and you have the need to make business calls,
call your company and use the company PBX to make an external call to the
desired party. You just pay the costs for the phone call to your company.
The other costs will automatically be placed on your extension number or on
a special project.
Note: To use the DISA function, your extension has to be authorized by
the system administrator. To activate the DISA function, you have
to change the default password from “0000” to a personal one, see
Section 12.8 on page 59.
You can also divert calls from your office extension to your external position,
see Section 9 on page 43. During the procedure you will be prompted for your
password.
1. Enter the public number of your company, followed by the DISA number.
Ask the system administrator for the defined DISA number.
Note: If want to register the call on an account number, you should use
the Account Number procedure before you enter the external
number, see Section 15.2 on page 67.
2. Follow the voice announcements.
3. Dial the digit(s) for external line access and the desired public number.
Note: Which digit to press for external line access depends on the
configuration of the system.
Or:
Use the External Diversion function. Procedure, see Section 9 on page 43.
Note: If you program a new diversion address, remember to reset it when
you return to your office.
15.4 Tandem Configuration
The tandem configuration is a unit, consisting of two phones using the same
directory number. One of the phones is defined as the primary and the other
one as the secondary.
This function enhances the communication for users that, for example, have a
wired phone on their desk (the primary phone) and need to be mobile within
their company’s building with their own Cordless phone (the secondary phone).
Basically, the tandem configuration works as follows:
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1424-EN LZT 103 091 Uen A1 2008-10-27