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The extensions can be programmed not to receive
DISA calls, when DISA on the trunk is active,
and caller dials that deactivated extension number.
The default setting is DISA call receive disable
for all extensions, hence the programmer have
to programme desired extensions DISA enable, while
programming DISA activation on the trunk. This
can be programmed as follows,
Password
+

Where,
* for All extensions
Ext is Particular Extension
C = 0 or 1 is DISA Call Receive Disable or Enable
respectively.
For example, the extensions 31, 32 and 34
are executive where the DISA calls should not
come without screening and for rest extensions
DISA call should be received, then programme as
follows,
Password+
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