Toshiba STRATA DK14 Installation And Maintenance Manual page 469

HHEU Upgrade Installation
See Figures 11-7 and
follow 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.
4. Connect the HESC-65A cable to
P601 of the HHEU (both HHEU1A
versions and the HHEU2 have P601) if
the Loud Ringing Bell option is
required.
Refer to Chapter 12 – Peripheral
Installation for HESB installation
procedures.
5. For the V.3 HHEU1: If only the headset
is connected to the HHEU, cut both
sides of the R607 resistor, then remove
the resistor to eliminate electrical
contact.
Do not cut the R607 resistor if
Note
connecting an HESB to the HHEU
for the Loud Ringing Bell–even if a
headset is also installed on the
HHEU.
...or
For the V.4 HHEU1 and the HHEU2: if
only the headset is connected to the
HHEU, cut the speaker OCA strap.
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.
Strata DK I&M 6/00
11-15~11-19 and
R607 (HHEU1 V.1 ~ V.3)
Figure 11-18 HHEU Installation for Digital Telephones
DKT2001 Digital Single Line Telephone
Component Side of HHEU
HHEU
Feed Through
for HESC-65(A) Cable
1488
HESC-65 Cable
or
HESC-65A Cable
HHEU
Figure 11-19 HESC-65A Cabling
Station Apparatus
SW601
(HHEU1 V.1 ~ V.3)
OCA
(HHEU1 V.4
or HHEU2)
P601
1487
To HESB
Block
SW601
P601
11-19