Toshiba Strata AirLink DK40i, Руководство по установке и обслуживанию

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DK40i Installation
Printed Circuit Board (PCB) Installation
3-30
Strata DK I&M 6/00
TCOU - Four-circuit Loop Start CO Line Board
System:
DK40i Base KSU (mounts on KSU TMAU)
Circuits per PCB:
four loop start CO line circuits
Interfaces with:
loop start lines
Older Version(s):
none
The optional TCOU PCB installs onto the TMAU motherboard. (See Figure 3-21 and Table 3-7
for information on controls, indicators and connectors.)
Note
Only one TCOU or TDDU can be installed on the motherboard.
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 Figure 3-6 for installation
information and Figure 3-27 on Page 3-44 for wiring.
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 Figure 3-21 ). Tighten the screw until the spade is snugly secured.
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 Figure 3-21 ).
3. Pull back the three plastic stand-off tabs and pull up on the TCOU until P110, P111 and P112
are unplugged.