Toshiba Strata DK 280 Installation Manual page 188

3. Only digital telephones equipped with an
HHElJ2 can be wall mounted. The HHEU2
is identical to the V.4 HHEUI, except that
the HHEU2 has longer wires to
accommodate wall mounting.
4. A Toshiba HESC-65A cable is required to
connect the HHEU in a digital telephone
to the HESB.
5.
7000-series
digital
telephones cannot
be
equipped with the HHEU (any type or
version) and the integrated data interface
unit
(f/Ml-D/) at the same time, but 2000-
series digital telephones can support an
HHEU and a RPCI-DI or PDIU-Dl2 at the
same time.
HHEU Upgrade Installation
Install the HHEU in accordance with the following
steps.
For 2000~series digital telephones, refer to Figure
5-7 (DKT2010-H) or Figure 5-8 (DKT2010-SD,
DKT2020-S, DKT2020-SD). Connect the wire
plug of the HHEU PCB to the HHEU connector on
the printed circuit board (PCB) of the telephone.
- or -
1. Loosen the four captive screws securing the
For lOOO-series digital telephones, refer to Figure
telephone base (Figure 5-l), and remove the 5-9, and connect the wire plug of the HHEU to the
base. HHEU connector on the PCB of the telephone.
2. Using a screwdriver or other suitable tool, remove
the plastic tab located on the back of the base
(Figure 5-l); the HHEU modular connector for the
headset will be accessed through this opening.
3. If installing a V.3 HHEUI, set the SW601 switch
on the HHEU to headset for the headset or loud
bell application (Figure 5-10). V.4 HHEUl and
HHEU2 do not have this switch, because both of
these upgrades are automatically set for the
headset/loud bell application.
4. Connect the HESC-65A cable to P601 of the
HHEU (both HHEUlA versions and the HHEU2
have P601) if the Loud Ringing Bell option is
required (Figure 5-11). Refer to Chapter 6-
Peripheral Installation for HESB installation
procedures.
5. For the V.3 HHEUl: If only the headset is
connected to the HHEU, cut both sides of the
R607 resistor (Figure 5-lo), then remove the
resistor to eliminate electrical contact.
Note:
Do not cut the R607 resistor if connecting an
HESB to the HHEU for the Loud Ringing
Bell-even if a headset is also installed on the
HHEU.
- or -
6.
7.
a.
9.
For the V.4 HHEUl and the HHEU2: if only the
headset is connected to the HHEU, cut the
speaker OCA strap (Figure 5-l 0). -
Note:
Do not cut the speaker OCA strap if
connecting an HESB to the HHEU for the
Loud Ringing Bell-even if a headset is also
installed on the HHEU.
Position the HHEU PCB on the standoffs inside
the base (Figure 5-10) and secure with the two
screws provided.
For 2000-series digital telephones, refer to Figure
5-7 (DKT2010-H) or Figure 5-8 (DKT2010SD,
DKT2020-S, DKT2020-SD), and locate the EX.SP
strap on the PCB in the telephone. Cut the strap if
an HESB will be connected to the HHEU.
- or -
For lOOO-series digital telephones, refer to Figure
5-9, and locate the EX.SP strap on the upper PCB
in the telephone. Cut the strap if an HHEU will be
connected to an HESB for the Loud Ringing Bell
option.
For 2000-series digital telephones, refer to Figure
5-7 (DKT2010-H) or Figure 5-8 (DKT2010-SD,
DKT2020-S, DKT2020-SD), and locate the HHEU
strap on the PCB in the telephone. Cut the strap if
a headset will be connected to the HHEU.
5-a January 1996