Loud Ringing Bell/Headset Upgrade (Hheu) - Toshiba Strata DK14 Installation And Maintenance Manual

Station Apparatus
Telephone Upgrades

Loud Ringing Bell/Headset Upgrade (HHEU)

The Loud Ringing Bell/Headset upgrade (HHEU) enables an external speaker (HESB) for the
Loud Ringing Bell feature and/or a headset to be connected to both series of digital telephones.
Notes
There are two types of HHEUs: the HHEU1 (which has four versions, V.1~V.4) and the
HHEU2.
Both 2000- and 1000-series digital telephones require either an HHEU2 or a V.3 or V.4
HHEU1 for HESB operation; earlier HHEU1 versions are only sufficient for headset operation
only.
Only digital 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.
A Toshiba HESC-65A cable is required to connect the HHEU in a digital telephone to the
HESB.
1000-series digital telephones cannot be equipped with the HHEU (any type or version) and
the integrated data interface unit (PDIU-DI) at the same time, but 2000-series digital
telephones can support an HHEU and a RPCI-DI or PDIU-DI2 at the same time.
HHEU Upgrade Installation
See Figures 9-2
these steps:
1. Loosen the four captive screws on the
telephone base, and remove the base.
2. Use a screwdriver or other suitable tool
to remove the plastic tab on the back of
the base. (The HHEU modular
connector for the headset is accessed
through this opening.)
3. If installing a V.3 HHEU1, set the
SW601 switch on the HHEU to headset
for the headset or loud bell application.
V.4 HHEU1 and HHEU2 do not have
this switch, because they are
automatically set for the headset/loud
bell application.
9-12
and 9-8~9-12 and follow
Component Side of HHEU
R607 (HHEU1 V.1 ~ V.3)
HHEU
Figure 9-11 HHEU Installation for Digital Telephones
SW601
(HHEU1 V.1 ~ V.3)
OCA
(HHEU1 V.4
or HHEU2)
P601
1487
Strata DK I&M 5/99