Tii VIS-4 - Manual

P/N 92230501 • Rev B• 3/25/2008
Warranty: If this unit fails during the warranty period, contact tii customer service to authorize return. Unit may be returned prepaid.
Model VIS-4
VOICE INTERCOM SWITCH
Installation Note
Description
1. The tii VIS-4 (Voice Intercom Switch) is a
microprocessor controlled module that
provides seamless switching from Digital
Voice Service to Door Answering Systems
(DAS)/Intercom service in multiple dwelling
unit’s (MDU’s). It also includes dial down
functionality.
2. The tii VIS-4 enables attending to the
DAS/Intercom calls while using Digital Voice
Service. The VIS-4 provides call waiting type
functionality between the two services.
3. The tii VIS-4 is for indoor use only.
4. The tii VIS-4 switches to the DAS/Intercom
when the Digital Voice Service loses power.
The user can also access the DAS intercom
line using a special dial down code.
5. The tii VIS-4 provides line hold function while
answering the DAS intercom.
Installation
1. Locate a suitable flat, dry area to install the
unit.
2. The existing telephone wiring to the MDU may
need to be modified to enable all telephone
connections in the MDU to connect through
the VIS-4.
3. Locate the first appearance of the DAS
Intercom telephone connection wall jack to the
MDU. Rewire the connections so that the
incoming wires from the DAS intercom are
connected to pins 2 & 3 of the RJ-11 marked
DAS/Intercom Input. Refer to Figure 2 for a
rewiring example.
From Digital
Voice Service To Phone at
Premises
3
2 2
2
3
2
From
DAS/Intercom
Figure 1
2
2
3
2
Digital Voice
VIS-4
Phone Intercom
DAS
Pins 2,3 Pins 2,3 Pins 2,3
Output
Input Input
Phone
Premises