P
AGE
5 of 14
M
ODEL
TI984 T
ELEPHONE
I
NTERFACE
42004-071F
f:\standard ioms - current release\42004 instr. manuals\42004-071f.doc
05/03
If using a dc source, either a battery and/or a UL-approved power supply/battery charger should be used.
The power supply must be capable of providing at least 1.4 amperes dc @ 23-28 V. Connect the positive
wire to terminal 1 and the negative wire to terminal 3 (the Power Selector switch may be in either
position). See Figure 4 for wiring details. Terminal 4 should be connected to the earth ground for
maximum safety.
For convenient wiring, GAI-Tronics offers an 8-conductor cable, Model 60038-101. This cable has three
14 AWG conductors for power and ground and five 18 AWG conductors for page and party line audio
connections and a spare. If another cable is used, note that the audio wires must be twisted pairs but need
not be shielded.
Note
: Each power input is fuse protected. The 2 fuses are located on top of the power supply shield.
Both fuses are rated ½ amp. See Figure 1 for the location of these fuses.
Page/Party
®
Connections
The TI984 needs to be connected to both the
page line and the party line of the
Page/Party
®
system. See Figure 5.
Party line connections should be made to
terminals 13 and 14 as shown in Figure 5,
and on the connection diagram printed on the
power supply circuit board (rear enclosure).
In a multi-party system, one of the party
lines must be selected as the designated party line. The TI984 only connects to the designated party line.
Note
: The 33-ohm line balance resistor must be removed from the designated party line of the
Page/Party
®
system. This resistor is generally located in a separate assembly called a
line balance
network
. Only the line balance resistor for the party line should be disconnected. Page line connections
should be made to terminals 15 and 16.
Remote Connections
The
A
CCESS
,
R
ESET
, and
D
AY
/N
IGHT
switches on the TI984’s front cover can be connected at remote
locations if the unit is located away from the switchboard or primary user. See Figure 6.
The
A
CCESS
switch manually connects between the Page/Party
®
system and the outside telephone line.
The
R
ESET
switch can be used to disconnect calls. The
D
AY
/N
IGHT
switch is used to switch the unit
between the two modes of operation.
Note
: A programming change is required to use the remote
D
AY
/N
IGHT
switch.
Figure 5. Page/Party
®
Connections
Day Mode
Night Mode
In Use
Constant On
Flashing, mostly on
Not in Use
Constant Off
Flashing, mostly off
