DISA Call Receive Programming
     
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 + 5 9 0 */EXT C

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+  5 9 0 * 1 5 9 0 3 1 0 5 9 0 3 2 0 5 9 0 3 4 0

 
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