1.15 Optional Device Features
120 Feature Guide
[Flowchart]
A DISA call from an outside party is received.
No
Is there an idle port on an MSG card?
Does the CO line group
that received the call employ Intercept
Routing Busy/DND?
Yes
No
The call is routed to the intercept
destination.
Yes
The PBX answers the call.
The OGM plays and the PBX starts to
receive the DTMF signaling.
No
Yes
The call is routed to an operator.
(DISA Intercept Routing No Dial)
The OGM stops.
No
Is a second digit dialed?
Is the first digit dialed?
Yes
Is the first dialed digit assigned a
destination for the DISA AA service?
The call is routed to the destination.
Yes
The PBX receives the dialed
digits and checks the dialed
number.
No
What is the DISA security mode?
Continued on next page
F
C
A
The call is routed
to an operator.
(Intercept Routing
No Destination)
(DISA First Digit Time for Routing To
Operator When No Dial expires)
(DISA Mute & OGM Start Time
after Answering expires)
(DISA Delayed
Answer time expires)
(DISA Second Digit Time for
Automated Attendant expires)
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