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1.16 Optional Device Features
156 Feature Guide
[Flowchart]
A DISA call from an outside party is received.
No
Is there an idle port on the
MSG cards?
Does the trunk group that
received the call employ Intercept
Routing Busy DND?
Yes
No
The call is routed to the intercept
destination.
(DISA Delayed Answer Time
Time-out)
Yes
The PBX answers the call.
(DISA Mute Time
Time-out)
The outgoing message (OGM) plays and
the PBX starts to receive the DTMF signalling.
No
Is the first digit dialled?
Yes
(DISA 1st Dial Time for
Intercept Time-out)
The call is routed to the Operator.
(Intercept Routing No Destination)
The outgoing message (OGM) stops.
No
Is the second digit dialled?
Yes
(DISA 2nd Dial Time for
AA Time-out)
Is the first dialled digit assigned a
destination for the DISA AA service?
The call is routed to the destination.
Yes
The PBX receives the following
dialled digits and checks the
dialled number.
No
What is the DISA security mode?
Continued to the next page
Goes to
A
C
The call is routed
to the operator
(Intercept Routing
No Destination)
.
F