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Direct Inward System Access
DESCRIPTION
CONSIDERATIONS
The Direct Inward System Access (DISA) feature allows remote access to
MERLIN II system phones and lines. By placing calls on lines administered
for DISA, callers outside the system can do the following:
Place calls to a particular intercom number in the MERLIN II system
without going through an attendant. For example, a person working off
site can call a co-worker directly, even if the system is pooled and all
incoming calls normally ring at an attendant's console.
Access a line that is administered to the MERLIN II system and place a
call on that line. For example, a sales representative who is on the road
can use the company's WATS line to call prospective clients.
For security reasons, you can set up this feature so that callers must enter a
password before placing a call. You can also allow callers to dial intercom
numbers from outside the MERLIN II system but prevent them from
accessing other system lines.
DISA lines must appear on buttons at the Display Console.
To take advantage of DISA, the caller must use a Touch-Tone telephone.
The MERLIN II control unit must contain one or more modules with
Touch-Tone receivers, such as the 4-Line Module with Touch-Tone
Receivers (400 w/TTR Module) or the 12-Basic Telephone (012) Module.
Callers using the DISA feature cannot use Automatic Route Selection
(ARS), enter an account code, or make announcements using Loudspeaker
Page or Group Page.
The system treats DISA calls to intercom numbers as transferred calls.
Therefore, in square (nonpooled) and behind-switch systems, the phone to
which the call is directed must have a button for the line on which the call
came in. After the connection is made, the call becomes a standard
outside call.
DISA calls cannot be placed on rotary lines.
If the system has the Call Report feature, it generates records of outgoing
calls placed through DISA by remote access callers.
Calls that are misdialed or not dialed within a certain amount of time are
transferred to the primary attendant.
MERLIN II System Features
3-45
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