Instruction manual

ACU-1000 Operations Manual
6-2
6.1.3 Installation
Note: STU-3 Option interfaces only with DSP modules, not the PSTN
6.1.3.1 Connections
Connecting the STU-III phone to the ACU-1000:
1.) Plug the STU-III phone into the telephone jack in the wall.
2.) Remove the handset cord from the STU-III phone.
3.) Find the supplied telephone cables with an RJ-9 connector on one end and RJ-11 on the
other.
Note: The RJ-9 is the connector used with the handset, the RJ-11 is the
connector used with the STU-III interface boxes.
4.) Plug in the supplied cables between the STU-III interface box and the STU-III phone.
a.) Plug one of the RJ-11s into the “HAND-SET” jack located on the STU-III
interface box; plug the other end of the cable (RJ-9) into the handset of the STU-III
phone.
b.) Plug in the other RJ-11 into the “PHONE” jack located on the STU-III interface
box and plug the other end of the cable (RJ-9) into the base of the STU-III phone where
the handset cable would normally be connected.
Note: Step 5 does not apply for turnkey systems having the DB-15
cables already mounted.
5.) Find the supplied ACU/STU-III cable having one DB-15 terminated on each end of the
cable.
a.) Plug the end of the cable identified STU-III END into the “INPUT” connector
on the STU-III interface box. This DB-15 will have a cable and two separate
conductors terminated within the shell. The two conductors (one red and one black) are
used to power the STU-III boxes. Connect the other end of the red and black
conductors to the back of the ACU-1000 DC-INPUT terminals. If more than one STU-
III is being used, plug these conductors into the supplied power terminal bus (red to
positive and black to negative). The terminal bus will receive power from the ACU-
1000’s DC-INPUT terminals or any other 12 VDC power source. When using the
ACU-1000 as the power source the PSM-1A module must be in the “charge” and “12
VOLT” mode.
b.) To place the PSM-1A in these modes the user must first UNPLUG the power
cable from the wall. Loosen the retaining screws on the top and bottom of the PSM-1A
module.