NEC XN120 Feature Manual page 80

Features
DISA Toll Restriction
The digits a DISA caller dials for an outgoing call may be subject to the system's Toll Restriction.
DISA Operating Modes
The DISA Operating Modes determine what happens when a DISA caller forgets to dial, calls a busy
or unanswered extension or dials incorrectly. The system can either drop the call or send it to a preset
Ring Group (called a DISA Transfer Destination).
Department Calling with Overflow Message
If a DISA caller dials a busy Department Calling Group, the system can periodically play the voice
prompt, "Please hold on. All lines are busy. Your call will be answered when a line becomes free."
while the caller waits. The interval between the voice prompts is the DISA Overflow Message Time.
When an extension in the Department Group becomes available, the call automatically goes through. If
the Department Calling Group remains busy past the DISA No Answer Time, the DISA call routes to
the overflow destination or disconnects. (What happens to the unanswered call is set by the DISA
Operating Mode). The Overflow Message requires a VRS.
Warning Tone for Long DISA Calls
You can set up the system to provide a warning tone to DISA callers that have been on a call too long.
The warning tone can be just a reminder (which the caller can ignore) or can be followed by a forced
disconnect of the call. When the DISA caller hears the warning tone, they have the option of dialling a
code to continue the conversation or disconnect.
DISA Dial in Mode
You can select the method that the digits dialled by a DISA caller are routed by the system by Program
25-01-01.
You can select Intercom mode where the received digits are used to route the DISA caller or you can
select Convert mode where the received digits are passed to the DDI Conversion table.
When you select the Convert mode the operation of the DISA call is the same as a DDI call, as fol-
lows:
The trunk port that the DISA call is received on will define the trunk group number (Program
14-05-01).
The trunk group number will define the DDI table area for each night mode (Program 22-13-01).
The DDI table area is defined by Program 22-10-01. You now have the DDI conversion table to be
used as the convert table.
The quantity of digits that the DISA caller must dial is define by Program 22-09-01 (default is 4
digits).
The digits received are then compared to the receive dial entries of the DDI table (Program 22-11-01),
if an exact match is found the call will be routed to the DDI target number (Program 22-11-02). If a
match is not found the DISA call will be disconnected.
If the DDI target number is invalid the call will not use the DISA option for Wrong Dial (Program
25-03-01). If the DDI target is invalid the options for the DDI will be used (Program 22-11-06 & 06).
If the DDI target number is busy/no answer the call will not use the DISA option for Busy/RNA
(Program 25-04-01). If the DDI target is busy/RNA the options for the DDI will be used (Program
22-11-04).
DISA Password/User ID
You can enable/disable the DISA password per trunk port by Program 25-01-02. When enabled all
DISA callers must enter a valid 6-digit password before the call can proceed; the password s are
defined in Program 25-08-01. The DISA password is used to assign a DISA Class of Service.
If the DISA password is disabled the incoming caller does not need to enter any password to access all
of the DISA options.
Care should be taken when the password is disabled as any DISA caller can access outgoing trunks
and paging zones etc.
Features Manual
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