Direct Inward System Access (DISA)
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40
UST DK Electronic Telephone
Direct Inward System Access (DISA)
Outside callers with telephones that send Dual-tone Multi-frequency (DTMF) tones can call
on CO lines programmed for DISA and dial a [DN] or outgoing CO Line without going
through an attendant or operator. See the System Administrator for this number.
➤
To make an internal DISA Call
➤
To make an external DISA Call
1. Dial the DISA CO
Line telephone
number.
You hear a ringback tone signal, then an internal dial tone for
10 seconds.
If you do not dial within 10 seconds, the system automatically
causes the DISA CO Line to ring a telephone or group of
telephones designated in system programming. Then, if the call
is not answered within 15 seconds after the ringing starts, it
disconnects.
2. Dial a [DN].
You hear ring tone. When the station answers, you are
connected.
Note
If the call is not answered after 6 rings or 24 seconds,
(whichever comes first) you hear busy tone.
3. Press
anytime you
hear busy tone and
repeat step 2 to make
another call.
Note
To call another station after completing a DISA station
call, the internal party must transfer you. Station and
System Page cannot be accessed on DISA calls.
1. Call the DISA CO
Line telephone
number.
You hear a ringback tone signal, then an internal dial tone for
10 seconds.
If you do not dial within 10 seconds, the system automatically
rings the DISA CO Line as a normal incoming call. Then, if the
call is not answered within 15 seconds after the ringing starts, it
disconnects.
2. Dial a CO Line or CO
Line access code
when you hear dial
tone
If you do not hear dial tone, you must also dial a DISA security
code. See Table 29 on Page 100 for CO Line Access Codes.
