AASTRA 4220 Lite for BusinessPhone User Guide EN - Manual (Page 76)

Other Useful Features
BusinessPhone – Dialog 4220 Lite / Dialog 3210 76
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 cost for
the phone call to your company. The other cost will automatically
be placed on your extension number or on a special project.
Note: To activate this function, you have to change the
Default Password from 0000 to a personal one. Which code
to use and how to change it, see section “ Change
Password ” on page 62.
You can also divert calls from your office extension to your external
position, see section “ Call Forwarding ” on page 36. During the
procedure you will be prompted for your Password. z
Dial the public number of your company,
z
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 “ Account Number ”
on page 77. z
Dial the external number.
Or:
Use the External Diversion function.
Procedure, see section “ Call Forwarding ” on page 36.
Note: If you program a new diversion address, remember
to reset it when you return to your office.