S e c t i o n 3 – S y s t e m P r o g r a m m i n g
35
DISA
Dial at auto answer.
The system can be set to answer incoming calls with a voice message, prompting the user to dial a
specific extension, or dial ‘00’ to be diverted to an external number. The external number is shared
with the External call diversion feature, on page 46. Depending on the digits entered, the caller is put
through to the correct extension directly, or to the external number. If no digits are dialled, the call
will revert to a general call. It is possible to program a PIN number with the DISA facility so that the
extensions or external number may only be dialled directly if a PIN is also entered with the DISA
code. Callers into the system will be treated according to the flowchart of Figure 3-5. Note also that
the access code is shared with the incoming call control feature above.
Figure 3-5 DISA Operation Flowchart
Yes
No
No
Yes
No
Yes
No
Yes
Yes
No
Incoming call
Auto-answered ?
Auto-answer not enabled
Dial 4 for DISA
Access code
required?
Enter DISA access
code
Access code
correct?
Call accepted,
ext. rings with incoming
call
Incoming Call
control enabled?
Call
disconnected
Call goes to a general
call, all extensions ring
Enter a valid
extension
number
Entered ‘00’ &
external no.
programmed?
Call diverted to
external number
Yes
