Toshiba Strata DK 280 Installation Manual page 152

Programs *81,
*84, *87-Assigns which [DN] will
flash when the CO line rings a telephone.
Program
93-Assigns names to lines.
4.10 Four-Circuit CO Line Interface
Unit (PCOU: Versions 1 & 2)
Each PCOU PCB adds four loop start CO lines to the
system. The PCOU provides Ring Detection, Dial
Outpulsing, and Hold, as well as Automatic Busy
Redial circuitry. Each line can be programmed for
DTMF or dial pulse signaling and gas tube secondary
protection. There are two PCOU versions: the PCOUI
,
and the PCOU2. They are identical in fit/form/function
and are interchangeable in all DK system models.
PCOU controls, indicators, and interface connectors
are shown in Figure 4-25 and described in Table
4-18.
4.10.1
PCOU Hardware Options
There are no hardware options supported by the
PCOU.
4.10.2
PCOU Installation Procedures
Install the PCOU in accordance with the following
steps:
1.
Remove the PCOU from its protective packaging.
Note:
The decibel (dB) PAD switches SW10 1
through S W40 1 control excessive loudness
resulting from close proximity to a CO or PBX
telephone office by providing a -3 db signal
level drop to, or from, the PBX or CO when
set to the 3 position. Switches are factory-set
to the 0 (0 dB signal level drop) position.
2. If the KSU is located within one mile of the PBX or
CO telephone office, set dB PAD switches SW101
through SW401 to the 3 (-3 dB signal level drop)
position.
Note:
Ensure the PCOU's component side is facing
right when installing it in the KSU.
3. Insert the PCOU into the appropriate slot and
apply firm, even pressure to ensure proper mating
of connectors.
4. After installing the PCOU, gently pull the PCB
outward. If the connectors are properly mated, a
slight resistance will be felt.
4.10.3
PCOU Wiring
Refer to the PCOU wiring diagram in Chapter 7-
Wiring Diagrams for wiring/interconnecting details.
4.10.4
PCOU Programming Overview
See Subsection 5.8.4 (RCOU Programming Overview)
for an overview of PCOU programming (as well as
RCOU programming).
4-36
January
1996