AASTRA 4187 Plus for BusinessPhone User Guide EN - Manual (Page 62)

Other Useful Features
BusinessPhone – Dialog 4187 Plus 62
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.
Notes: 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 “ Change Password ” on page 52.
You can also divert calls from your office extension to your external
position, see section “ Call Forwarding ” on page 35. During the
procedure you will be prompted for your password. z
Dial the public number of your company,
z
followed by the DISA directory number.
Ask the system administrator for the defined DISA directory
number.
Listen and follow the voice announcements.
Note: If want to register the call on an Account Number,
you should use the Account Number procedure before you
enter the public number, see section “ Account Number ” on
page 61. 0 z
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 “ Call Forwarding ” on page 35.
Note: If you program a new diversion address, remember
to reset it when you return to your office.