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Chapter 3 - Key Station Features, Operation, and Programming
Direct Inward System Access (DISA)
Description
This feature allows you to remotely access system features such as System Speed Dial,
Line Access for long distance calling, CO Line-to-CO Line Conferencing, and Intercom
dialing. Any number of DISA lines may be assigned incoming DISA access based on the
system service mode (Day, Night or Always). Talk time can be manually extended by the
outside DISA party. Since the passwords are relatively short, caution should be exercised
when permitting unauthorized use of the DISA facilities.
Operation
CO line 1 is programmed for DISA operation. When a call is made to CO line 1, that call is
automatically answered and a DISA dial tone is heard.
When a DISA dial tone is heard:
1. Dial [#].
2. Dial the desired station number + your password.
3. Dial [#]. Once your password is verified, a second dial tone is presented.
4. Dial a CO line access code (700-795) or a valid station number.
Conditions
Two DISA CO lines may be used simultaneously. If more than two DISA CO lines are
signaling for answer, the subsequent calls will receive an internal busy tone.
DISA CO line (COS) assignment coincides with Toll Restriction COS Tables.
Activation time for a DISA CO line is programmable for Never, Day, Night or Always.
If you dial a station number which is non-existent, your call will be directly transferred
to the attendant.
The CO Line-to-CO line conference time is programmable for 1, 2, 3, 5, 10, and 15
minutes (default is one minute). The CO line-to-CO line conference time may be set to
automatically drop the connected outside parties upon expiration of a
pre-programmed time.
D irect Inward System Ac cess (DISA)
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