Pcou Exchange Line Interface Unit; Pcou Installation - Toshiba Strata DK40 Installation & Maintenance Manual

DK40 Universal Slot PCBs
PCOU
Exchange Line Interface Unit
System:
Circuits per PCB:
Interfaces with:
Compatible Slot(s): 15 ~ 18
Older Version(s):
The PCOU also provides ring detection, dial outpulsing, and hold circuitry. Each PCOU line
can be programmed for DTMF or dial pulse signalling.
Note
PCOU PCBs are shown in

PCOU Installation

Excessive loudness which is caused by close proximity to a local Exchange or PBX can be
fixed through the PCOU decibel (dB) PAD switches. PCOU dB switches SW101, SW201,
SW301, and SW401 provide a -3 dB signal level drop between the PBX and local Exchange
when set to position 3. Switches are factory-set at the 0 (0 dB signal level drop) position.
See Figure 3-8
To install a PCOU PCB
1. If the Strata DK system is within one mile of the PBX or local Exchange, set the PCOU
dB PAD switches SW101, SW201, SW301, and SW401 to the 3 (-3 dB signal level
drop) position.
2. Insert the PCOU (component side facing right) into the appropriate slot, and apply firm,
even pressure to ensure proper mating of connectors.
3. After installing the PCOU, gently pull the PCB outward. If the connectors are properly
mated, a slight resistance will be felt.
3-16
Refer to the Strata DK40 Programming Manual or DK Library CD-Rom for more details.
DK40Expansion KSU
four loop start exchange line circuits
loop start lines
PCOU1 (not compatible with DK40)
Toshiba strongly recommend that dial pulse signalling is not selected.
Figure 3-8
and Table 3-5 for PCOU controls, indicators, and interface connectors.
and described in Table
Strata DK40 I&M Manual Spring 1999
3-5.
PCOU