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DIRECT TRUNK SELECTION
Each station can be allowed access to or denied access from a trunk or trunk group
by access code when LCR is activated. When restricted, the station user must use
a trunk key or a route key.
DIRECTORY NAMES
Each station, station group and C.O. line may be assigned a directory name (maxi-
mum 11 characters). In addition, each personal speed dial number, system speed
dial number and entry in the DID translation table may be assigned a name (maxi-
mum 11 characters). These names are displayed during calls with these ports and
in the case of station and speed dial names, can be used to originate calls.
Dial by Name feature (Display Features).
DISA SECURITY
Telephone fraud and long distance thefts are a serious concern. The 400si pro-
vides a strong DISA security system. If an incorrect DISA passcode is entered
repeatedly (as is the case with "hackers"), the DISA system can be automatically
disabled temporarily. Both the number of incorrect passcode attempts and the time
that DISA is disabled are programmable. In addition, all failed attempts to access
DISA print on SMDR (if provided) with a "DE" DISA error flag.
DISTINCTIVE RINGING
A user knows the type of call received by the type of ring heard. Outside calls have
a single ring repeated while internal calls have a double ring repeated.
In addition any trunk or station can be programmed to ring a keyset with a pre-
defined ring tone (1–8) or a single line port with a predefined cadence (1–5) selec-
tion. This provides for easy identification of special lines or extensions that ring
your phone.
DOOR LOCK RELEASE (PROGRAMMABLE)
After answering a call from the door phone, users can dial a code to activate a
contact closure. This can be used to operate a customer-provided electric door
lock release mechanism. The contact closure timer is programmable from 100–
2500 ms.
DOOR PHONES
The door phone interface module (DPIM) provides for connection of a door phone
to a DLI port. Pressing the button on the door phone produces a distinctive ring
(three short rings repeated) at the assigned station or station group. If not an-
swered within a programmable time, the system releases the door phone and stops
the ringing. Stations may call the door phone directly and monitor the surrounding
areas. Door phones follow the system ring mode plan.
4.1.11
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