Tcou Hardware Options; Tcou Installation Or Replacement; Tcou Removal - Toshiba STRATA DK14 Installation And Maintenance Manual

DK40i Installation
Printed Circuit Board (PCB) Installation
TCOU - Four-circuit Loop Start CO Line Board
System:
Circuits per PCB:
Interfaces with:
Older Version(s):
The optional TCOU PCB installs onto the TMAU motherboard. (See
for information on controls, indicators and connectors.)
Note

TCOU Hardware Options

The TCOU PCB accepts the optional Caller ID (TCIU2 not TCIU1) board. When the TCIU2 is
installed on the TCOU, the tip/ring of the TCOU circuits 1~4 are automatically connected to the
tip/ring of TCIU2 circuits 1~4 respectively.

TCOU Installation or Replacement

1. Make sure the power supply (TPSU16A) DC power switch is Off.
2. Mate the TCOU male connectors P110, P111, P112 to P10, P11 and P12 respectively on the
TMAU. Apply firm, even pressure to ensure proper connection. See
information and
3. Secure the three plastic stand-off tabs and install screws in upper right and lower left corners.
4. Set decibel (dB) PAD switches SW101, SW201, SW301, and SW401 to the appropriate
position. In most cases set to the normal position (NOR). Switches are factory set at the 0 (0
dB signal level drop) position. If CO lines are connected to a PBX or are in close proximity to
the central office, set the PAD positions to 3 to provide a -3 dB signal level drop between the
PBX and CO.
5. Slip the spade connected to the green/yellow wire under the second screw from the right on the
TPSU power supply (see

TCOU Removal

If you need to remove/replace the TCOU, make sure the power supply (TPSU16A) DC power
switch is turned Off.
➤ To remove the TCOU
1. Loosen the screw on the TPSU power supply and free the spade.
2. Loosen and remove screws securing the TCOU to the TMAU (see
3. Pull back the three plastic stand-off tabs and pull up on the TCOU until P110, P111 and P112
are unplugged.
3-30
DK40i Base KSU (mounts on KSU TMAU)
four loop start CO line circuits
loop start lines
none
Only one TCOU or TDDU can be installed on the motherboard.
Figure 3-27 on Page 3-44
Figure
for wiring.
3-21). Tighten the screw until the spade is snugly secured.
Figure 3-21 and Table 3-7
Figure 3-6 for installation
Figure 3-21).
Strata DK I&M 6/00