Loud Ringing Bell/Headset Upgrade (Hheu) - Toshiba Strata DK24 Installation And Maintenance Manual

INSTALLATION-TELEPHONE
SECTION 400-096-207
SEPTEMBER 1992
NOTE:
Exercise care when assembling the HVSU to
the HVSI to prevent damage to the connector
pins; also, verify that the HVSU is aligned with
the silk-screened image on the HVSI.
3) Position the HVSU/HVSI subassembly on the
standoffs inside the base, and secure with the
two screws provided (Figure 7-14).
4) Connect the HVSU/HVSI subassembly wire
plug to the P2 connector on the electronic
telephone PCB (Figure 7-13).
5) Reinstall the electronic telephone base, and
secure it with its four captive screws.
4.20 Loud Ringing Bell/Headset Upgrade
(HHEU)
4.21 The Loud Ringing Bell/Headset upgrade
(HHEU) enables an external speaker (HESB) and/
or a headset to be connected to the electronic
telephone. The HESB serves as a Loud Ringing
Bell when connected to a telephone.
NOTES:
1. There are two types of HHEU: the HHEU1
(which has four versions, V.1 ~ V.4) and
the HHEU2.
2. Only electronic telephones equipped with
an HHEU2 can be wall mounted. The
HHEU2 is identical to the V.4 HHEU1,
except that the HHEU2 has longer wires
to accommodate wall mounting.
3. A Toshiba HESC-65 or HESC-65A cable
is required to connect the HHEU in a
digital telephone to the HESB. Refer to
Section 400-096-208 for HESB installa-
tion procedures.
4. All HHEU versions and types, except for
V.1 HHEU1, are compatible with the Off-
hook Call Announce upgrades (HVSU2
and HVSU/HVSI).
4.22 HHEU Upgrade Installation. Install the HHEU
upgrade in accordance with the following steps:
1) Loosen the four captive screws securing the
telephone base (Figure 7-1), and remove the
base.
2) Using a screwdriver or other suitable tool,
remove the plastic tab located on the back of
the base (Figure 7-1). The HHEU modular
connector for the headset will be accessed
through this opening.
3) If using a V.3 or earlier HHEU1, set the
SW601 switch to the HEADSET position for
HESB and/or headset connection (Figure 7-
15). This switch is not on either the V.4
HHEU1 or the HHEU2, because the opera-
tion is automatic with these subassemblies.
4) Connect the HESC-65 or HESC-65A cable
(either one) to P601 of the HHEU if the Loud
Ringing Bell option is required (Figure 7-11).
Refer to Section 400-096-208 for HESB in-
stallation procedures.
5A) For the V.3 or earlier HHEU1: If only the
headset is connected to the HHEU, cut both
sides of the R607 resistor on the HHEU
(Figure 7-15) and 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.
5B) For the V.4 HHEU1 or the HHEU2: If only the
headset is connected to the HHEU, cut the
OCA strap (Figure 7-15).
NOTE:
Do not cut the OCA strap if connecting an
HESB to the HHEU for the Loud Ringing
Bell—even if a headset is also installed on the
HHEU.
6) Position the HHEU subassembly on the stand-
offs inside the base (Figure 7-15), and secure
with the two provided screws.
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