AASTRA 4225 for MX-ONE Telephony Switch - Manual (Page 95)

95 Dialog 4223 Professional/Dialog 4225 Vision
Other Useful features
DISA = Direct Inward System Access
If you are assigned to use this feature and you are working externally,
you can call your office and get access to an external line in order to
make business calls. The business call will be charged your office
extension number or an account number. You will be charged just for
the call to the office.
The external phone must be of push button type provided with pound
key ( #
) and star key (
*
) or a mobile phone adapted for dial tone
pulses (DTMF).
After a completed DISA call you must hang up before a new DISA call
can be made.
There are different procedures depending on the type of Authorization
Code, or when an Account Code is used.
With common Authorization Code
z
Call the DISA feature at your office.
Dial tone.
*72*
Dial.
z #
Dial the Authorization Code and press.
Dial tone.
z
Dial the external number.
With individual Authorization Code
z
Call the DISA feature at your office.
Dial tone.
*75*
Dial.
z *
Dial the Authorization Code and press.
z #
Dial your own extension number and press.
Dial tone.
z
Dial the external number.